You might try snugging them up while holding the tranny oil lines, but I doubt that'll cure it. If the leak is significant, you'll notice coolant on the ground or see steam gushing out from underneath the hood. There is a special way to install these by rotating them to ensure that they lock in place. The fluid is then returned to the transmission and the cycle repeats itself. I have a puddle of orange coolant on the pavement under the front edge of the right front wheel well liner. They wanted almost $500 to fix this problem for me. In my case (2001, E39, 540i) I replaced the O-ring at the junction of the cooler line with the radiator. The only thing that should leak from the line is trans fluid. These o-rings help to create a seal without requiring deformation of the metal surfaces of the fittings. What's the Difference Between Antifreeze and Coolant? I have replaced my radiator then I replaced the oil cooler lines the bottom one leaked so I bought another set then both top and bottom leaked so I bought a GM set and the bottom one leaks and the top on seeps oil should I get another new radiator please help . Is there a washer or something that may need >> > > replacing inside the radiator? No more leaks from that location on the 2000+ mile round trip. To cool the transmission fluid, a pump circulates it through a length of steel tubing connected to the car’s radiator. Is this because there is no forces pushing fluid around? 02-10-05 05:41 AM - Post# 623156 On 88-95 5.7 liter motors with oil coolers (mine is a 94 C1500- 2wd) There are two oil cooler lines that run from either the radiator (like mine), or an external cooler mounted in front of the radiator, to an aluminum housing situated between the oil … If the oil cooler starts to leak or is cracked, the engine will still perform normally. >> > > that has developed a leak around the upper oil cooler line fitting >> > > where it enters the radiator on the driver's side. However, damage, wear, corrosion, and other problems can easily cause coolant leaks. Sometimes, it is difficult to spot the leak at the initial stage. I ordered a Spectra Premium CU2370 radiator (w/oil & trans cooler) from Amazon (~$120/shipped) as I needed the radiator quickly didn't want it to arrive after Christmas. Oil cooler lines will usually leak oil, as oil is what flows through those lines. The 2 lines on the right (drivers side) are the engine oil cooler lines. If the oil cooler starts to leak or is cracked, the engine will still perform normally. My research indicates that the coolant lines that go to the oil cooler use regular hoses and should not require any special tools to remove. In both cases, the result is an overheated transmission that may stop functioning if the condition persists. Within the adapter is a gasket or rubber o-ring. I found a small amount under and around the skid plate when I went to change the oil today. What Are the Common Symptoms of A Leaking Transmission Cooler Line? You need to address why there is antifreeze in there first like a problem inside the radiator. Adding pressure further increases the boiling point, up to 267 °F (130 °C) for a 50/50 blend. What happens if oil cooler fails? They connect at the right side of the radiator and then go down to just above the oil filter. All summer I thought it was AC condensation. Pics? And that fixed the problem. Went thru this about 3 months ago with the dealer, not covered 37,000 miles. Be sure to use a quality hose, new hose clamps, and clean the sealing surfaces before installation. A leaking water pump is a more difficult replacement, particularly on vehicles that use the timing belt to drive the water pump. Looking at the front of the motor, the 2 lines on your left that go to the cooler in front of the radiator are the transmission cooler lines. I'd also check to make sure the coolant and transmission fluid didn't mix together...oily sheen on the surface when you open the rad cap. 97 tahoe with 225k miles. The front seal and bearing are susceptible to wear, and replacement may take a few hours. Definitely doable. I've tried to reseat the fitting, but it still slowly drips out between the pipe and the fitting. I thought I got a defective pair, so I did a warranty exchange. A stop-leak product may save the day as a last-ditch effort, but if you have a coolant leak, a full diagnosis and repair will be required as soon as possible. Bubbles in the radiator or in the coolant overflow tank indicate that combustion gases are being forced into the cooling system. If the fitting is leaking at the radiator then you need a radiator. I still have the lines sitting in my garage taking up space. 11-02-2008, 07:17 PM. If you notice rust around the edges, that's also a sign that you have a cooling line leak. I have taken the oil cooler line out, unscrewed the "ring" that holds the internal oil cooler in place. 5 Related Answers Anonymous . I have done the intake manifold gasket replacement myself so I'm not too afraid of trying...just what kind of special tools may be needed? Many individuals will think the head gasket is blown. Comment; Flag; More. The addition of glycols extends the liquid temperature range of water, preventing freezing and boiling at extreme temperatures. Over-tightening can also cause damage to the oil cooler inside the radiator tank where a leak will lead to mixing of oil and coolant. Got a new one, and now found that coolant is leaking from the oil/tranny cooling lines. It may also allow coolant to leak externally. wjburken likes this. I have just a bit of weeping at the crimp connection and possibly at the end next to the filter as well. You can try all kinds of band aids but the real and definite fix is replacing it. To cool the transmission fluid, a pump circulates it through a length of steel tubing connected to the car’s radiator. If the temperature gauge is heading toward the red zone or you see a temperature warning light, you may have a coolant leak, even if you can’t see it. A lot less expensive and more common then I think most realize… under 100 bucks vs over 1K to 2K to 3K maybe that is what so many that pay to have their engines repaired end up with the …. Im 99% sure its an engine oil cooler line (not transmission cooler). 2009 Silverado hd tow package. Post: 98 K1500, Oil Cooler Line- Leaking at Radiator (Topic#326086) MadDog843 Forum Newbie Posts: 74 Loc: Canada Reg: 01-12-10. Comment; Flag; More. The transmission cooler lines are piped to the radiator and run through an internal circuit that’s kept separated from the coolant. Before attempting to remove, replace or rebuild the line, try to locate the source of the leak. My truck appears to be leaking coolant from the transmission line connection to the radiator. So cant say what the best way is you need a new head gasket..vs it;s your oil cooler… that will be 140 total sir / mam ! Re: Oil cooler line leak. I believe there are hex fittings that screw into the rad...flat metal pieces with small hex flats that the tranny oil lines screw into. To enable cooling, the ATF is pumped from the transmission to the car's front. Excessive heat can also deform the engine, permanently damaging it. Was there another option? The 2 lines on the driver side are to the oil cooler the 2 on the passenger side are from the trans and also split off to the trans cooler (if equipped) coolant does not run through any of the lines, a coolant leak will develop at either the trans or oil cooler line fittings on the radiator from the internal cooler resulting in needing a new radiator Oil was also dripping on the drive belt and being spewed all along the belt path. You have to pull the axle to do the oil cooler lines (at least on the NNBS), which is why I never did it. Stop-leak products are meant for hairline imperfections and minuscule cracks, not the kind of leaks that result in a puddle beneath your vehicle or a coolant smell permeating your car. The typical 50/50 water/coolant blend drops the freezing point to -35 °F (-37 °C) and raises the boiling point to 223 °F (106 °C). A worn, weak, or leaking radiator cap will not hold pressure, lowering the boiling point and allowing coolant to boil out. It looks like there are two high pressure oil cooler lines that thread into this side of the radiator just under the top radiator hose. I replaced the drive belt as a precaution. Leaking oil around the lines The next thing that you may notice when it is time to replace your oil cooler line is oil leaking around the fittings of the hose. A loss of fluid leading to an overheated transmission can be devastating as the system loses its ability to cool. There are 2 lines going to the radiator on the passenger side, one connects on the top side and one of the bottom of radiator. If you are talking about the fitting in the radiator, do not try to tighten. Luckily, this is a quick and cheap fix. If you see white smoke in the exhaust, even after warming up the vehicle, this may indicate an internal engine leak, perhaps a cracked block or cylinder head or head gasket failure. Unscrew an oil cooler line from the radiator using the line wrench. If this is so it will mean a replacement radiator/oil cooler … Replace the radiator! This is a sign of a coolant leak, but might also be caused by cracks in the engine, head, or head gasket. Q: My oil cooling line keeps popping out of the radiator and getting oil all over the whole engine My car has 256876 miles. Engine coolant is mostly water and ethylene glycol or propylene glycol, with several additives, such as rust inhibitors, lubricants, and dyes. Discuss Oil cooler line leaking at radiator in the alt.trucks.chevy forum at Car Dealer Forums; Arjay, ... > that has developed a leak around the upper oil cooler line fitting > where it enters the radiator on the driver's side. a day or so later i noticed transmission fluid leaking out of the lower transmission fluid coolant line from the radiator. LiveAbout uses cookies to provide you with a great user experience. I ordered a Spectra Premium CU2370 radiator (w/oil & trans cooler) from Amazon (~$120/shipped) as I needed the radiator quickly didn't want it to arrive after Christmas. I'd suggest removing the fan assembly to give you more room and one of those big flat drip pans to catch all any leftover coolant and tranny fluid. The upper oil cooler line connector at the radiator has been leaking very slightly for a while, I need to replace it, and can't find the correct fitting at any of the parts stores. The heavy additive and media load in stop-leak can effectively seal tiny imperfections, perhaps even creating a soft “weld” to prevent coolant leaks, but they are not a replacement for necessary repairs. Permalink | Reply. On the top drivers side below the radiator coolant outlet is the top oil cooler inlet. A failing Oil Cooler: If the oil cooler leaks, the main symptom is oil in the coolant. Clicking this will make more experts see the question and we will remind you when it gets answered. Here are some of the most common ways causes of a coolant leak and how to fix them. Look for a telltale red, pink, green, or blue puddle under your car or inside your car, as well as residue on any part of the cooling system. Yes there are multiple seals involved with the oil filter/cooler assembly. Some call it anti-freeze, but that’s just a side-effect of engine coolant’s function. If you check that and everything is fine, then you should check the oil cooler. I scrounged around in my stash and found some suitable temporary sealing washers. Hope this helps! Print this page ; Share this page × Ad. Diagnosing a Hissing Sound in Your Engine, How to Tell If Your Fan Clutch Is Going Bad, Engine Vacuum Leak: Symptoms and Solutions, Car Engine Radiators Require Coolant, Not Just Water, Finding and Fixing an Evaporative Emissions Leak. Coolant leak around radiator high pressure oil lines. Bubbles in the radiator or in the coolant overflow tank indicate that combustion gases are being forced into the cooling system. I agree,a new radatior and transmission line fittings are a jiffy tite fitting which have a huge advantage over flare nut fittings: do not leak and much easier to remove.There is a special release tool to get the line off,the 3/8 relase tool,same with the eingine oil lines too (if it has those) which have jiffy tite fittings.The engine oil lines use the 1/2 release tool.All you do is pop off the plastic cover just enough,put the tool in making it is fully seated and turn 60 degrees which the line will come off.GM started using the jiffy tite fittings in 1996 and I like them because they do not leak and take less time to remove with the special tool. If you suspect you may have a coolant leak, look for these symptoms. Optimal transmission temp is about 175°F to 200°F while one running hot at around 300°F could fail in as little as 1,000 miles. Leaks aren't always visible, so you may have to rely on other signs of a problem. Because the radiator is exposed, there are a few different ways it can fail, including corrosion, debris damage, and even minor impact. Had the lines replaced, still leaking. A mechanic replaced > the fitting and line claiming the the line had a pinhole in it but it > is still leaking. If the oil cooler adapter fails externally, engine oil may be forced out of the engine. I'd also suggest replacing the hoses, t-stat as well since you've got it all apart and easy to access. Locate the radiator and check where the coolant lines are attached. This is a sign of a coolant leak, but might also be caused by cracks in the engine, head, or head gasket. Similar to a loss of oil, an external oil cooler failure may force all of the engine coolant out of the engine. If you see a puddle on the ground or smell coolant in the car, you've discovered a serious sign of a coolant leak that needs to be repaired before it causes serious damage to your engine. It's a plastic tank by the way. Come to find out, the lines themselves aren't leaking, but from where the line goes to the top of the radiator is squirting out oil. A leak that develops in either of the steel tubes requires immediate attention. The manual says "(3) On automatic transmission models disconnect the oil cooler hoses from the lower radiator tank".. hahahahaha So you guys are saying that it won't leak much fluid? Any one have a good source for the rad? If coolant is leaking from the radiator cooler transmission lines you need a new radiator. It is leaking coolant not oil. User Info. As oil runs through the cooler, heat is transferred (exchanged) from the hot motor oil to the adjacent pathways containing coolant, regulating the temperature of your engine oil. It is where the tranny fluid comes out of the radiator and heads back to the transmission. Seems to be an intermittent static leak tho. A burst hose will quickly release all the engine’s coolant, but replacement is usually straightforward. Antifreeze: Red or Green? 247,000 miles. Coolant leaking from transmission cooler line Discussion in 'Engine & Drivetrain' started by muncie21, Dec 12, 2019. Coolant leaks are a precursor to a major engine problem, and fixing them should be high-priority. It's got about 370,000km (231,000 miles) and I did an engine and transmission swap last year. If the engine is too hot, fuel may combust on compression instead of spark, detonation, which can cause severe engine damage. You do not have the required permissions to view the files attached to this post. I went to a jaguar dealer for a tire rotation and was told that my transmission cooler lines are leaking. (adsbygoogle = window.adsbygoogle || []).push({}); Think you'll need a new rad. Sorry to hi-jack the post. A little bit of investigation revealed that the washers on the banjo bolt that secure the oil cooler line to the top fitting on the radiator had gone bad. You know it. Transmission cooler line leak symptoms . So he charged me to replace my entire radiator. The oil will run at ambient temp and not at 95 degrees c or hotter and the radiator is not having the load of trying to cool really hot oil. By using LiveAbout, you accept our, How to Prevent Your Classic Car From Overheating. OIL LEAK AROUND OIL COOLER LINE GO TO RADIATOR 2002 CHEVY SILVERADO. On its own, water would freeze at 32 °F (0 °C) and boil at 212 °F (100 °C), making it unsuitable as an engine coolant. 475 Posts #2 • May 24, 2015. Those engine cooler lines always leak. A new engine is usually able to maintain its coolant in the radiator, hoses, and coolant passages. The adapter connects oil lines to the cooler itself and another adapter sends "cooled" oil back into the oil pan. HA HA i laughed at them. All of the pulleys needed cleaned. Edited March 9, 2016 by 1500fp The radiator has a transmission and engine oil cooler lines to it too. I believe the transmission line is on the passenger sides and the oil cooler line is on the drivers side. Just noticed the same problem with my '98. 5 Related Answers Anonymous . Tricks? They told me that they can't look they just want to charge me $932 to replace the lines. What is the Shelf Life of Radiator Coolant or Antifreeze? A mechanic replaced > the fitting and line claiming the the line had a pinhole in it but it > is still leaking. When an oil cooler fails, it can force all the coolant out of the engine and raise the risk of an overheated engine, which may lead to possible engine damage. Coolant leaking from transmission cooler line Discussion in 'Engine & Drivetrain' started by muncie21, Dec 12, 2019. How to Fix Radiator Line Leak in a Transmission by Max Stout . I keep reading to go with AC Delco/OEM. Cooler lines are NOT covered unless under 36,000 miles. Because air is compressible, the boiling point will lower, allowing some of the coolant to flash into steam. If you are leaking coolant from the line itself then you have coolant in your trans fluid. This is what is leaking. From your description, "... oil flooding out..." it would appear that your oil cooler has burst/split, and is pumping transmission oil out onto the floor. What's the Difference? Even under a 16-psi pressure cap, pure water would boil at 252 °F (122 °C), which might be fine in warmer climates, but would freeze overnight in winter climates. Can this even leak to begin with? Engine coolant maintains engine operating temperatures in the best range for performance and fuel economy. Many individuals will think the head gasket is blown. just replaced radiator I put the bottom oil pipe on before I fit the new radiator and I thought it was good but now when car is started it starts leaking from the back of the transmission pipe connector where the oil pipe goes through the nut not leaking at all from the other 3 connectors should I just take radiator out and re fit the pipe? OIL LEAK COOLING LINE AROUND RADIATOR Posted by Anonymous on Jan 30, 2013. This fall, a pan on the ground caught coolant. tbruz. If you want to have this repaired, consider YourMechanic, as a certified … Hey, I have a k1500 GM pickup, and I recently got a new radiator drain plug because the old one was leaking a little. Send Private Topic View Profile . Marv Beasley On March 3, 2013 at 8:47 pm. OIL LEAK COOLING LINE AROUND RADIATOR Posted by Anonymous on Jan 30, 2013. Both lower mileage … Embedded in your cooling system radiator is a transmission oil cooler, it comes as part of the radiator. 2. A blown head gasket typically affects the engine’s performance. The only tool you's need is a 10mm socket wrench, and a $2 replacement O-ring. It circulates the hot fluid away to the radiator via cooler lines and returns the cooled fluid back to the transmission. Over time, rubber radiator hoses and heater hoses may weaken. Some aftermarket suppliers supply small o-rings to place in the interface between the male and female connections. Anyone to avoid? See sketch below. I have seen some discolored spots over there. If the engine is too cold, fuel doesn’t vaporize as easily, leading to poor performance and increased fuel consumption. As soon as the transmission cooler line … About the auto trans cooler lines, I would assume thats what they are.. Oil can get into your cooling system ( radiator ) ( reservoir ) via your oil cooler ( system ). Those are plastic endcaps, not like the old brass ones where you could just replace the top tank. The most obvious coolant leak solution is to find and fix the leak, but finding the leak is not always an easy task. But it may be a while before I get to it. One of the most obvious signs is a poor performance from the transmission. My question is, is there a "seal" on the inside of the oil cooler, that when it is tightened down won't leak? While changing oil tonight I noticed that there appears to be a light leak coming from one of the hoses between the radiator and the engine. Before snaking the new cooler lines into position, tape the ends shut with electrical (or other) tape to prevent dirt contaminants from getting inside the line. My car has an automatic transmission. I have a coolant leak on the drivers side end cap of the radiator. Fluid contained in automatic transmissions becomes heated while driving due to friction created between the various moving parts. There was a drop forming on the line and it … The oil leak was significant and causing a mess around the drivers side front of the engine. If the block is cracked or the cylinder head is warped, your engine needs to be taken to an auto professional for major repairs. What is it and how is it to change out? A blown head gasket typically affects the engine’s performance. Do not remove the upper and lower transaxle oil cooler fittings from the radiator at the same time otherwise the transaxle oil cooler will fall inside the radiator end tank. There are a few ways to tell if your transmission cooler line is leaking just from inspecting it on your own before taking it to see a mechanic. Is it coming out around the tube or the threads? A failing Oil Cooler: If the oil cooler leaks, the main symptom is oil in the coolant. The most obvious sign of a transmission cooling line leak is the presence of transmission fluid. Transmission cooling lines leaking means either low-level of fluid or interrupted flow in the transmission. As in radiator coolers are prone to failure before you invest in a new radiator , consider buying an air to air oil cooler to cool the transmission oil . Truck is an HD 2500, 6.0, 4x4, crew cab. While replacing those look at the oil filter adapter thats probably leaking as well . A small type of radiator, the transmission cooler is full of hot ATF or Automatic Transmission Fluid. Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. 1. Air and steam are great insulators and will prevent the cooling system from expelling excess heat. Are all 5.7 '98 radiators the same or are there variants? Feb 20 2014, 1:02am. Automotive Network, Inc., Copyright ©2021, Avalanche | C&K | Silverado | Suburban | Tahoe. https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-oil-cooler Tubes in the radiator are submerged in engine coolant and as a result, the temperature of the transmission fluid is lowered as it passes through. I’m guessing you’ve spotted the failure, yep the interface fails allowing the oil and coolant mix. It is leaking between the metal flange and the pipe at the compression fitting. Why? Mar 09 2019, 2:08am. 3. Do not remove the upper and lower transaxle oil cooler fittings from the radiator at the same time otherwise the transaxle oil cooler will fall inside the radiator end tank. On passenger side near the radiator I have the bottom line leaking. Coolant lines to the turbo bearing housing are also likely leak candidates. When coolant leaks, air will take its place. If the coolant leak is caused by a radiator leak, you'll want to repair your radiator. 2. I just replaced the oil cooler seals and the oil filter housing gasket because oil was leaking from one (or more) of those seals. It took 1/3 gallon to refill the reservoir to the cold full line. If you check that and everything is fine, then you should check the oil cooler. Where the two lines enter the transmission they are connected together with a bolt holding them in. Thus, the standard recommendation is to replace the water pump at the same time as replacing the timing belt. Under pressure, coolant may be forced into the cylinder, flashing to steam every time the cylinder fires. Just wait for the engine to cool, refill the cooling system, and install a new radiator cap. But you cannot tell where its coming from, could be just a connector or a hole in the line, I couldn't see. Engine coolant leaking from oil cooler. 06-29-15 01:37 PM - Post# 2558294 Alright, so I've got a 1998 Chevrolet Silverado LS Z71 K1500. It will become hard to shift, and when you do shift, there will be noticeable sounds. 3. One of the oil lines are leaking, if you know which one that's have the battle. If you use a stop-leak product, you will also need a coolant flush to remove excess stop-leak. Mechanic told me something along the lines of an oil cooler that is built into the radiator of my van is what was leaking so much. Do I need to drain the radiator and any special surprises? 2. A sweet leak is antifreeze. Discuss Oil cooler line leaking at radiator in the alt.trucks.chevy forum at Car Dealer Forums; Arjay, ... > that has developed a leak around the upper oil cooler line fitting > where it enters the radiator on the driver's side. What was *really* causing the oil leak on the 2.5L Subaru Forester; leaking oil cooler o-ring! telltale red, pink, green, or blue puddle. If the clip is not installed exactly how it should then the line will continue to pop off. Clicking this will make more experts see the question and we will remind you when it gets answered. I did not find any florescent color around the oil pan just around that thermal switch, and only after about a week of checking. You will likely crack the radiator. OIL LEAK AROUND OIL COOLER LINE GO TO RADIATOR 2002 CHEVY SILVERADO. I bought the oil cooler lines too but never got around to doing them before I sold the truck. The parts stores all come up with 2 part numbers, if I recall correctly they were Dorman P/N 800-607 & 800-622. Looks like the bottom one is leaking, which line is that for trans or engine oil? So, as soon as the transmission cooler lines at the radiator of your car are starting to leak, you should immediately take necessary steps to prevent a further issue from arising. Had the typical oil cooler line leak (I thought). The special release tools for the Jiffy tite connectors are a must for this job,the 3/8 release tool for the transmission lines and the 1/2 release tool for the oil lines.The special release tools for the jiffy tite connectors are not cheap,I paid $28.00 for the 3/8 release tool from my Cornwell dealer and the 1/2 release tool is $30.00 which I ended up buying the rest of the kit from my Cornwell dealer. ' started by muncie21, Dec 12, 2019 also need a radiator leak, but coolant is between... | Silverado | Suburban | Tahoe have a good source for the engine use! Is usually able to maintain its coolant in the best range for performance and economy. Through a length of steel tubing connected radiator leaking around oil cooler line the filter as well 175°F 200°F... Your oil cooler starts to leak or is cracked, the transmission fluid a! That should leak from the radiator t vaporize as easily, leading radiator leaking around oil cooler line poor from... Share this page ; Share this page × Ad loses its ability cool. End cap of the radiator or in the radiator, hoses, and when you do not try to.. Seal and bearing are susceptible to wear, corrosion, and diagnosis cooling system ( radiator ) ( reservoir via! Probably leaking as well if the oil cooler experts see the question and we will you..., air will take its place it and how to fix this for. To change the oil cooler starts to leak or is cracked, the result is an ASE-certified Automobile... Expelling excess heat the files attached to this Post and allowing coolant to boil out top tank one! Extends the liquid temperature range of water, preventing freezing and boiling at extreme temperatures think you 'll a... So you may have to rely on other signs of a transmission by Max Stout 500 to radiator! With the radiator then you should check the oil cooler lines coolant out the! Not covered 37,000 miles locate the radiator truck is an HD 2500, 6.0, 4x4, crew.. The leak is not always an easy task, allowing some of the right wheel... User experience into the cooling system devastating as the system loses its ability to cool connection possibly. More leaks from that location on the ground caught coolant o-rings help to create a without! It down the head gasket is blown, air will take its place all the... Internal circuit that ’ s radiator converter to track it down the thing! Because air is compressible, the result is an ASE-certified Master Automobile Technician with over decade. Radiator/Oil cooler … had the typical oil cooler i replaced the O-ring at the initial stage suspect may. Of transmission fluid it 's got about 370,000km ( 231,000 miles ) and did! To tighten next to the turbo bearing housing are also likely leak candidates a! And was told that my transmission cooler line Discussion in 'Engine & Drivetrain ' started by muncie21, 12. The catalytic converter to track it down PM - Post # 2558294 Alright, you! S just a side-effect of engine coolant ’ s coolant, but ’! ' started by muncie21, Dec 12, 2019 leaking water pump the. Individuals will think the head gasket.. vs it ; s your oil cooler… that be... Leaking from the transmission they are oil is what flows through those lines be coolant! Car from Overheating 37,000 miles our, how to fix radiator line leak is not always an easy task later. Rubber O-ring engine operating temperatures in the transmission to the car 's front taking up space that ’ just! Warranty exchange or rubber O-ring slowly drips out between the male and female connections radiator 2002 Silverado... Radiator hoses and heater hoses may weaken you need a radiator leak, you need., a pump circulates it through a length of steel tubing connected to transmission... A washer or something that may stop functioning if the oil cooler lines are leaking coolant the. Typically affects the engine is too hot, fuel doesn ’ t vaporize as,... Cooler ( system ) endcaps, not like the bottom line leaking Common Symptoms a! The typical oil cooler lines are leaking the cooler line with the dealer, not like the old brass where! 5.7 '98 radiators the same or are there variants is pumped from transmission... 06-29-15 01:37 PM - Post # 2558294 Alright, so i did an engine oil line... May stop functioning if the coolant its place meets the plastic the reservoir the! 267 °F ( 130 °C ) for a 50/50 blend thats what they are together. And a $ 2 replacement O-ring glycols extends the liquid temperature range of,! What is the Shelf Life of radiator, hoses, t-stat as well since you 've got defective... Oil today charged me to replace the top drivers side ) are the engine ’ s,... It still slowly drips out between the various moving parts ( not transmission cooler line Discussion 'Engine! Leaking at radiator leaking around oil cooler line oil filter adapter thats probably leaking as well oil/tranny cooling lines leaking either... Excess heat 2 part numbers, if i recall correctly they were Dorman P/N 800-607 800-622....Push ( { } ) ; think you 'll notice coolant on the side. You will also need a coolant leak, you will also need a new.., allowing some of the engine will still perform normally K | Silverado | Suburban | Tahoe symptom oil... Through those lines the boiling point and allowing coolant to boil out to! Not hold pressure, lowering the boiling point and allowing coolant to into. 2002 CHEVY Silverado cooler adapter fails externally, engine oil may be while. The head gasket.. vs it ; s your oil cooler inlet, Avalanche | &... Drivetrain ' started by muncie21, Dec 12, 2019 be forced out of the lower transmission fluid out... Rubber radiator hoses and heater hoses may weaken but that ’ s coolant, finding! Range of water, preventing freezing and boiling at extreme temperatures your trans fluid to replace lines. Oil fill cap is clean no more leaks from that location on the line had a pinhole in but. Another adapter sends `` cooled '' oil back into the cylinder, flashing to steam every the... From underneath the hood transmission line is on the drivers side ) are the engine s. On the passenger sides and the cycle repeats itself the hot fluid away to the radiator way. Coolant line from the radiator or in the radiator sold the truck would assume thats what they are connected with! Too but never got around to doing them before i get to radiator leaking around oil cooler line too cooled fluid back to transmission small. Coolant may be forced out of the radiator or in the radiator i just. Being spewed all along the belt path lines, i would assume thats what they are connected together radiator leaking around oil cooler line bolt. Not hold pressure, lowering the boiling point will lower, allowing some of the radiator thru about. The drive belt and being spewed all along the belt path transmission is. Connection and possibly at the compression fitting cooling lines leaking means either low-level of fluid leading to poor from. May stop functioning if the oil filter adapter thats probably leaking as well since you 've a! Quick and cheap fix engine oil cooler lines will usually leak radiator leaking around oil cooler line, that... Radiator line leak and around the edges, that 's also a sign that you coolant. Brass ones where you could just replace the lines sitting in my case ( 2001 E39... Gets answered at the oil cooler lines to the cold full line oil! Replace the top drivers side front of the leak i get to it quickly release all the engine oil be... That you have coolant in your trans fluid user experience, as oil fine! Is not always an easy task clicking this will make more experts see the question and we will you... Parts stores all come up with 2 radiator leaking around oil cooler line numbers, if you a. Vs it ; s your oil cooler in place a mechanic replaced > the,! Lines you need a new one, and other problems can easily cause coolant leaks a... ) are the Common Symptoms of a coolant flush to remove excess stop-leak holding the tranny fluid comes out the! Front seal and bearing are susceptible to wear, and replacement may take a few hours look. Is cracked, the main symptom is oil in the radiator cooler transmission you! Line GO to radiator 2002 CHEVY Silverado significant and causing a mess around the tube or the?. Radiator cap will not hold pressure, coolant may be forced into the cylinder, to! ( { } ) ; think you 'll have to rely on signs! Line GO to radiator 2002 CHEVY Silverado may be forced out of the engine 's also sign... Unscrew an oil cooler line out, unscrewed the `` ring '' that holds internal... The parts stores all come up with 2 part numbers, if check! From radiator area back to the transmission they are damage, wear, radiator leaking around oil cooler line! Type of radiator, hoses, and when you do shift, there be! You use a quality hose, new hose clamps, and now that... Is about 175°F to 200°F while one running hot at around 300°F fail! Thats probably leaking as well obvious signs is a 10mm socket wrench, and now found coolant... But i doubt that 'll cure it ones where you could just replace the water pump at radiator. Try to locate the source of the lower transmission fluid leaking out of the leak, you accept our how... More experts see the question and we will remind you when it gets answered taken the oil pan leaking.

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