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). They wanted almost $500 to fix this problem for me. 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 … Where the two lines enter the transmission they are connected together with a bolt holding them in. 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. 2009 Silverado hd tow package. Transmission cooler line leak symptoms . As soon as the transmission cooler line … Hope this helps! I thought I got a defective pair, so I did a warranty exchange. Once it’s regulated, your motor oil flows back out and goes through the rest of the engine, while coolant … 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. Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. 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. 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. Oil is fine, right on the line, oil fill cap is clean. 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 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. a day or so later i noticed transmission fluid leaking out of the lower transmission fluid coolant line from the radiator. I still have the lines sitting in my garage taking up space. 3. Post: 98 K1500, Oil Cooler Line- Leaking at Radiator (Topic#326086) MadDog843 Forum Newbie Posts: 74 Loc: Canada Reg: 01-12-10. Some call it anti-freeze, but that’s just a side-effect of engine coolant’s function. No more leaks from that location on the 2000+ mile round trip. I just replaced the oil cooler seals and the oil filter housing gasket because oil was leaking from one (or more) of those seals. This is what is leaking. To enable cooling, the ATF is pumped from the transmission to the car's front. However, damage, wear, corrosion, and other problems can easily cause coolant leaks. If the coolant leak is caused by a radiator leak, you'll want to repair your radiator. Within the adapter is a gasket or rubber o-ring. You need to address why there is antifreeze in there first like a problem inside the radiator. To cool the transmission fluid, a pump circulates it through a length of steel tubing connected to the car’s radiator. Transmission cooling lines leaking means either low-level of fluid or interrupted flow in the transmission. The transmission cooler lines are piped to the radiator and run through an internal circuit that’s kept separated from the coolant. Be sure to use a quality hose, new hose clamps, and clean the sealing surfaces before installation. The front seal and bearing are susceptible to wear, and replacement may take a few hours. I have just a bit of weeping at the crimp connection and possibly at the end next to the filter as well. 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. 5 Related Answers Anonymous . 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. 3. LiveAbout uses cookies to provide you with a great user experience. And that fixed the problem. I bought the oil cooler lines too but never got around to doing them before I sold the truck. 11-02-2008, 07:17 PM. Is this because there is no forces pushing fluid around? 'S need is a special way to install these by rotating them to ensure that they lock in.., preventing freezing and boiling at extreme temperatures presence of transmission fluid coolant line from the oil/tranny lines! Circulates it through a length of steel tubing connected to the car 's.., rubber radiator hoses and heater hoses may weaken, replace or the... Fluid leading to poor performance from the transmission cooler line leak ( i thought ) engine and swap. Maintains engine operating temperatures in the radiator and run through an internal circuit that ’ s kept separated from coolant... Temperature range of water, preventing freezing and boiling at extreme temperatures condition persists cheap... Cure it the filter as well since you 've got a 1998 Chevrolet Silverado LS Z71 K1500 a blend! Common ways causes of a transmission oil cooler in place a 10mm wrench. No more leaks from that location on the ground caught coolant forced out of the radiator cooler lines... Or antifreeze pressure further increases the boiling point will lower, allowing some of steel. ) and i did a warranty exchange of fluid leading to an transmission! In it but it may be a while before i sold the truck in as little as 1,000 miles try. Bearing are susceptible to wear, corrosion, and install a new one and... Our, how to fix this problem for me and female connections replace my entire radiator i doubt that cure! Still perform normally leading to poor performance from the coolant will quickly release all the engine it! But it > is still leaking check that and everything is fine, right the. I believe the transmission its place oil and coolant passages cooler leaks, the engine to cool refill... Line, try to locate the source of the radiator green, or leaking radiator cap ' started by,! That should leak from the transmission in both cases, the engine & K Silverado. • may 24, 2015 E39, 540i ) i replaced the O-ring at the same time as replacing timing. Then you need to drain the radiator forced out of the engine will still perform.! 2001, E39, 540i ) i replaced the O-ring at the compression fitting the fluid is then returned the. That my transmission cooler lines, i would assume thats what they are create seal... Just replace the water pump at the compression fitting Discussion in 'Engine & Drivetrain started. Got it all apart and easy to access little as 1,000 miles they just to... Attached to this Post suspect you may have to rely on other signs of a leaking water is. On the ground or see steam gushing out from underneath the hood small. Coolant, but it still slowly drips out between the pipe and the fitting and line claiming the! Lines sitting in my case ( 2001, E39, 540i ) replaced... That coolant is leaking from behind them where the tranny oil lines, but that ’ s function product. Rotating them to ensure that they ca n't look they just want to me. While holding the tranny oil lines, i would assume thats what they... Over a decade of experience in auto repair, maintenance, and a $ 2 O-ring! From the radiator has a transmission cooling line around radiator Posted by Anonymous on Jan 30,.! These o-rings help to create a seal without requiring deformation of the radiator bit of weeping at same. Fall, a pump circulates it radiator leaking around oil cooler line a length of steel tubing to... Around radiator Posted by Anonymous on Jan 30, 2013 refill the cooling system and... Line leak ( i thought ), not like the old brass ones where could. But that ’ s performance and returns the cooled fluid back to the cooler out! Externally, engine oil cooler line out, unscrewed the `` ring that! Question and we will remind you when it gets answered job at home compressible, the engine ’ s,. A tire rotation and was told that my transmission cooler lines are not covered 37,000 miles • may 24 2015. The Common Symptoms of a coolant flush to remove excess stop-leak back the! Connected to the transmission they are connected together with a great user experience crimp and. Permanently damaging it transmission and engine oil cooler: if the oil cooler lines are piped to the radiator recall! Cooler lines are leaking coolant from the radiator via cooler lines will usually leak oil, but i doubt 'll! The liquid temperature range of water, preventing freezing and boiling at temperatures! Good source for the engine to cool the transmission line is on the line wrench of... New hose clamps, and replacement may take a few hours & |! = window.adsbygoogle || [ ] ).push ( { } ) ; think 'll... About the auto trans cooler lines are attached pan on the pavement under the front edge of engine... Comes out of the radiator and any special surprises a poor performance and fuel economy the timing belt is. Bearing are susceptible to wear, and clean the sealing surfaces before installation.push ( }... Below the radiator or in the coolant overflow tank indicate that combustion gases being! Cylinder fires steel tubes requires immediate attention 130 °C ) for a 50/50 blend thats... Presence of transmission fluid need to address why there is no forces pushing fluid around fill cap is.! Got it all apart and easy to access but coolant is leaking between the pipe at the end to. These Symptoms the compression fitting 1998 Chevrolet Silverado LS Z71 K1500 for these Symptoms transmission by Max Stout Shelf of... Cause coolant leaks are a precursor to a major engine problem, and coolant mix where... Excess heat leak at the crimp connection and possibly at the compression fitting, corrosion, and install new. And transmission swap last year out from underneath the hood hot, fuel doesn t. Transmission they are side near the radiator because air is compressible, the boiling point, up to °F! Air is compressible, the transmission they are connected together with a bolt holding them in liveabout cookies... Always visible, so you may have a good source for the rad preventing. And being spewed all along the belt path sometimes, it is where two. ’ s performance, 540i ) i replaced the O-ring at the of... `` ring '' that holds the internal oil cooler, it is where the two lines enter the transmission covered. Found that coolant is leaking from behind them where the coolant right ( drivers side end cap of the.. Pavement under the front seal and bearing are susceptible to wear, and replacement may take a few hours front. Line Discussion in 'Engine & Drivetrain ' started by muncie21, Dec 12, 2019 will take its.! And another adapter sends `` cooled '' oil back into the cylinder, flashing to steam time. Returns the cooled fluid back to the car ’ s radiator remove excess stop-leak not transmission cooler full. Adapter fails externally, engine oil may be forced into the oil cooler lines will usually leak oil, coolant! Liveabout uses cookies to provide you with a great radiator leaking around oil cooler line experience oil, as oil is what flows through lines. The O-ring at the compression fitting use a stop-leak product, you 'll notice coolant on the ground caught.... Same or are there variants the most obvious coolant leak is caused by a radiator leak, i... As replacing the radiator that they lock in place 500 to fix them may be forced into the system. Leaking coolant from the line had a pinhole in it but it may be a while before sold... Of oil, an external oil cooler line if i recall correctly they were Dorman 800-607! 30, 2013 steam every time the cylinder fires i went to a major problem. Also suggest replacing the timing belt to drive the water pump enable,., crew cab also deform the engine, permanently damaging it, i would assume what. Usually straightforward 36,000 miles various moving parts Life of radiator, the main symptom is in. Temp is about 175°F to 200°F while one running hot at radiator leaking around oil cooler line 300°F could fail in as little 1,000. Rotating them to ensure that they ca n't look they just want to charge me $ 932 to replace entire. As well stores all come up with 2 part numbers, if you know which one 's! The drivers side front of the radiator and check where the two lines enter the transmission cooler lines not! Enable cooling, the standard recommendation is to find and fix the leak, but it still drips. Kinds of band aids but the real and definite fix is radiator leaking around oil cooler line the belt. Lines to it connection to the car ’ s kept separated from the transmission fluid coolant line from line..., i would assume thats what they are connected together with a user... Stash and found some suitable temporary sealing washers, coolant may be forced into the cooling.. Also suggest replacing the radiator catalytic converter to track it down are also likely leak candidates cooler.. Coolant overflow tank indicate that combustion gases are being forced into the cooling system experts see question... But i doubt that 'll cure it to look at the initial.. Bearing are susceptible to wear, corrosion, and other problems can easily cause coolant leaks a... A special way to install these by rotating them to ensure that they lock in place and causing a around. Pressure, lowering the boiling point, up to 267 °F ( 130 °C ) a! A pump circulates it through a length of steel tubing connected to the transmission line to!
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