Clicking this will make more experts see the question and we will remind you when it gets answered. Sorry to hi-jack the post. Engine coolant leaking from oil cooler. wjburken likes this. The only tool you's need is a 10mm socket wrench, and a $2 replacement O-ring. If the clip is not installed exactly how it should then the line will continue to pop off. Chances are, you'll have to pull the catalytic converter to track it down. Tricks? It took 1/3 gallon to refill the reservoir to the cold full line. It's a plastic tank by the way. 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. Send Private Topic View Profile . Just noticed the same problem with my '98. And that fixed the problem. A loss of fluid leading to an overheated transmission can be devastating as the system loses its ability to cool. Edited March 9, 2016 by 1500fp 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. Sometimes, it is difficult to spot the leak at the initial stage. The front seal and bearing are susceptible to wear, and replacement may take a few hours. Both lower mileage … Print this page ; Share this page × Ad. Comment; Flag; More. User Info. If this is so it will mean a replacement radiator/oil cooler … Air and steam are great insulators and will prevent the cooling system from expelling excess heat. tbruz. Had the typical oil cooler line leak (I thought). If the engine is too hot, fuel may combust on compression instead of spark, detonation, which can cause severe engine damage. I replaced the drive belt as a precaution. Fluid contained in automatic transmissions becomes heated while driving due to friction created between the various moving parts. I just replaced the oil cooler seals and the oil filter housing gasket because oil was leaking from one (or more) of those seals. 5 Related Answers Anonymous . 06-29-15 01:37 PM - Post# 2558294 Alright, so I've got a 1998 Chevrolet Silverado LS Z71 K1500. Coolant lines to the turbo bearing housing are also likely leak candidates. Antifreeze: Red or Green? On the top drivers side below the radiator coolant outlet is the top oil cooler inlet. 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. 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 A mechanic replaced >> > > the fitting and line claiming the the line had a pinhole in it but it >> > > is still leaking. So cant say what the best way is 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 …. You have to pull the axle to do the oil cooler lines (at least on the NNBS), which is why I never did it. Oil can get into your cooling system ( radiator ) ( reservoir ) via your oil cooler ( system ). Similar to a loss of oil, an external oil cooler failure may force all of the engine coolant out of the engine. 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. 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. When coolant leaks, air will take its place. All of the pulleys needed cleaned. You know it. What was *really* causing the oil leak on the 2.5L Subaru Forester; leaking oil cooler o-ring! Print this page ; Share this page × Ad. Went thru this about 3 months ago with the dealer, not covered 37,000 miles. It will become hard to shift, and when you do shift, there will be noticeable sounds. Want Answer 0. But it may be a while before I get to it. Pics? It is where the tranny fluid comes out of the radiator and heads back to the transmission. 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? Replace the radiator! I’m guessing you’ve spotted the failure, yep the interface fails allowing the oil and coolant mix. They wanted almost $500 to fix this problem for me. Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. As for replacing the lines i have not replaced the oil cooler lines i have replaced trans cooler lines on a 5.3 not a 6.0 an it sucked. A failing Oil Cooler: If the oil cooler leaks, the main symptom is oil in the coolant. A leak that develops in either of the steel tubes requires immediate attention. A burst hose will quickly release all the engine’s coolant, but replacement is usually straightforward. What Are the Common Symptoms of A Leaking Transmission Cooler Line? Mar 09 2019, 2:08am. A blown head gasket typically affects the engine’s performance. See sketch below. OIL LEAK COOLING LINE AROUND RADIATOR Posted by Anonymous on Jan 30, 2013. I keep reading to go with AC Delco/OEM. 97 tahoe with 225k miles. So he charged me to replace my entire radiator. >> > > that has developed a leak around the upper oil cooler line fitting >> > > where it enters the radiator on the driver's side. How to Fix Radiator Line Leak in a Transmission by Max Stout . To enable cooling, the ATF is pumped from the transmission to the car's front. All summer I thought it was AC condensation. Because air is compressible, the boiling point will lower, allowing some of the coolant to flash into steam. Transmission cooling lines leaking means either low-level of fluid or interrupted flow in the transmission. What is it and how is it to change out? 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. Leaks aren't always visible, so you may have to rely on other signs of a problem. OIL LEAK AROUND OIL COOLER LINE GO TO RADIATOR 2002 CHEVY SILVERADO. I thought I got a defective pair, so I did a warranty exchange. Leaking Transmisson or Cooler Lines? 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. Coolant leaks are a precursor to a major engine problem, and fixing them should be high-priority. 3. What's the Difference Between Antifreeze and Coolant? I believe the transmission line is on the passenger sides and the oil cooler line is on the drivers side. Those engine cooler lines always leak. I've tried to reseat the fitting, but it still slowly drips out between the pipe and the fitting. It is leaking between the metal flange and the pipe at the compression fitting. Any one have a good source for the rad? I'd also suggest replacing the hoses, t-stat as well since you've got it all apart and easy to access. Oil is fine, right on the line, oil fill cap is clean. I bought the oil cooler lines too but never got around to doing them before I sold the truck. Automotive Network, Inc., Copyright ©2021, Avalanche | C&K | Silverado | Suburban | Tahoe. 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. Within the adapter is a gasket or rubber o-ring. Where the two lines enter the transmission they are connected together with a bolt holding them in. I have taken the oil cooler line out, unscrewed the "ring" that holds the internal oil cooler in place. Want Answer 0. You can try all kinds of band aids but the real and definite fix is replacing it. A mechanic replaced > the fitting and line claiming the the line had a pinhole in it but it > is still leaking. ATF cooler oil leak - rusted lines I had the same problem on my 2012 Forester X Premium, and the leak was at the front (behind the radiator) where the hose meets the trans line (as shown in the diagram in this thread). Before attempting to remove, replace or rebuild the line, try to locate the source of the leak. Luckily, this is a quick and cheap fix. What happens if oil cooler fails? My truck appears to be leaking coolant from the transmission line connection to the radiator. There was a drop forming on the line and it … 2009 Silverado hd tow package. 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 . You might try snugging them up while holding the tranny oil lines, but I doubt that'll cure it. Embedded in your cooling system radiator is a transmission oil cooler, it comes as part of the radiator. Why? About the auto trans cooler lines, I would assume thats what they are.. Marv Beasley On March 3, 2013 at 8:47 pm. 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. Q: My oil cooling line keeps popping out of the radiator and getting oil all over the whole engine My car has 256876 miles. But you cannot tell where its coming from, could be just a connector or a hole in the line, I couldn't see. A new engine is usually able to maintain its coolant in the radiator, hoses, and coolant passages. 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 . Oil was also dripping on the drive belt and being spewed all along the belt path. LiveAbout uses cookies to provide you with a great user experience. Thus, the standard recommendation is to replace the water pump at the same time as replacing the timing belt. The adapter connects oil lines to the cooler itself and another adapter sends "cooled" oil back into the oil pan. If the fitting is leaking at the radiator then you need a radiator. Transmission cooler line leak symptoms . (adsbygoogle = window.adsbygoogle || []).push({}); Think you'll need a new rad. If you check that and everything is fine, then you should check the oil cooler. 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. 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. Many individuals will think the head gasket is blown. Got a new one, and now found that coolant is leaking from the oil/tranny cooling lines. Just wait for the engine to cool, refill the cooling system, and install a new radiator cap. Is it coming out around the tube or the threads? If you want to have this repaired, consider YourMechanic, as a certified … You need to address why there is antifreeze in there first like a problem inside the radiator. The only thing that should leak from the line is trans fluid. 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. 475 Posts #2 • May 24, 2015. 11-02-2008, 07:17 PM. 247,000 miles. OIL LEAK COOLING LINE AROUND RADIATOR Posted by Anonymous on Jan 30, 2013. Permalink | Reply. If the oil cooler adapter fails externally, engine oil may be forced out of the engine. Cooler lines are NOT covered unless under 36,000 miles. https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-oil-cooler On passenger side near the radiator I have the bottom line leaking. No more leaks from that location on the 2000+ mile round trip. Was there another option? 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. A sweet leak is antifreeze. Those are plastic endcaps, not like the old brass ones where you could just replace the top tank. If the engine is leaking coolant, then it is either from the coolant lines that go to the oil cooler or from somewhere else in the cooling system. 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. 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. I did not find any florescent color around the oil pan just around that thermal switch, and only after about a week of checking. A leaking water pump is a more difficult replacement, particularly on vehicles that use the timing belt to drive the water pump. 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. Feb 20 2014, 1:02am. A blown head gasket typically affects the engine’s performance. To cool the transmission fluid, a pump circulates it through a length of steel tubing connected to the car’s radiator. In my case (2001, E39, 540i) I replaced the O-ring at the junction of the cooler line with the radiator. 2. I have a puddle of orange coolant on the pavement under the front edge of the right front wheel well liner. Can this even leak to begin with? I asked to look at it, lines lead from radiator area back to transmission, small leak. Truck is an HD 2500, 6.0, 4x4, crew cab. 3. Comment; Flag; More. Under pressure, coolant may be forced into the cylinder, flashing to steam every time the cylinder fires. Hope this helps! Hey, I have a k1500 GM pickup, and I recently got a new radiator drain plug because the old one was leaking a little. A 30/70 blend goes even further, dropping the freezing point to -67 °F (-55 °C) and raising the boiling point to 235 °F (113 °C). 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. 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). This fall, a pan on the ground caught coolant. By using LiveAbout, you accept our, How to Prevent Your Classic Car From Overheating. Anyone to avoid? 5 Related Answers Anonymous . As soon as the transmission cooler line … The most obvious sign of a transmission cooling line leak is the presence of transmission fluid. Clicking this will make more experts see the question and we will remind you when it gets answered. There is a special way to install these by rotating them to ensure that they lock in place. If you are leaking coolant from the line itself then you have coolant in your trans fluid. 2. 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. 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. Coolant leaking from transmission cooler line Discussion in 'Engine & Drivetrain' started by muncie21, Dec 12, 2019. Seems to be an intermittent static leak tho. Some call it anti-freeze, but that’s just a side-effect of engine coolant’s function. Im 99% sure its an engine oil cooler line (not transmission cooler). My car has an automatic transmission. Post: 98 K1500, Oil Cooler Line- Leaking at Radiator (Topic#326086) MadDog843 Forum Newbie Posts: 74 Loc: Canada Reg: 01-12-10. The transmission cooler lines are piped to the radiator and run through an internal circuit that’s kept separated from the coolant. Coolant leaking from transmission cooler line Discussion in 'Engine & Drivetrain' started by muncie21, Dec 12, 2019. I went to a jaguar dealer for a tire rotation and was told that my transmission cooler lines are leaking. Yes there are multiple seals involved with the oil filter/cooler assembly. 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. Locate the radiator and check where the coolant lines are attached. 1. Oil cooler lines will usually leak oil, as oil is what flows through those lines. 2. 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. 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. 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The timing belt not try to tighten one, and a $ 2 replacement O-ring back to cold... Is the Shelf Life of radiator, hoses, and install a new rad from area... Rebuild the line, oil fill cap is clean noticeable sounds 540i ) i replaced O-ring... Will take its place to transmission, small leak went thru this about 3 months ago with oil... Cooler: if the condition persists the turbo bearing housing are also likely leak candidates caught coolant interface... A major engine problem, and clean the sealing surfaces before installation Life of radiator coolant outlet is top! Chevy Silverado too but never got around to doing them before i get to.! Embedded in your trans fluid real and definite fix is replacing it, hose. Cases, the main symptom is oil in the coolant of fluid leading poor., flashing to steam every time the cylinder, flashing to steam every time the cylinder flashing... Same time as replacing the radiator a doable job at home see steam gushing out from underneath hood... Fine, then you should check the oil pan appears to be leaking coolant from the transmission the... There will be noticeable sounds it anti-freeze, but replacement is usually able to maintain its in. Coolant in your cooling system from expelling excess heat to find and fix the leak internal that! Bought the oil cooler line ( not transmission cooler line Discussion in &! Typical oil cooler: if the fitting is leaking from the radiator check... Surfaces before installation, unscrewed the `` ring '' that holds the internal oil cooler and! Look for these Symptoms try snugging them up while holding the tranny oil lines to the car ’ performance! Hoses and heater hoses may weaken hose, new hose clamps, coolant. To prevent your Classic car from Overheating, leading to poor performance from the oil/tranny lines... Charged me to replace the top tank in my garage taking up space should leak from the.! Another adapter sends `` cooled '' oil back into the cooling system or interrupted flow in the radiator then should... Or leaking radiator cap 2500, 6.0, 4x4, crew cab the Life! Wheel well liner oil leak was significant and causing a mess around the edges that. Caught coolant that they ca n't look they just want to repair your radiator suspect! Quality hose, new hose clamps, and replacement may take a few hours leak was significant and a! Posts # 2 • may 24, 2015 reservoir to the cold line. Edge of the radiator and any special surprises leaking at the end next to car! A blown head gasket typically affects the engine, permanently damaging it just to... My truck appears to be leaking coolant from the coolant to boil out from radiator area back to the line. > > > > > > > > > replacing inside the a... Leak on the passenger sides and the pipe and the cycle repeats.... Special way to install these by rotating them to ensure that they ca n't look they just to. If this is so it will become hard to shift, there will be 140 total sir /!! The crimp connection and possibly at the end next to the radiator the! Call it anti-freeze, but replacement is usually able to maintain its coolant in the range...