Engine coolant leaking from oil cooler. Both lower mileage … One of the oil lines are leaking, if you know which one that's have the battle. If you suspect you may have a coolant leak, look for these symptoms. About the auto trans cooler lines, I would assume thats what they are.. 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. So cant say what the best way is These o-rings help to create a seal without requiring deformation of the metal surfaces of the fittings. 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. >> > > that has developed a leak around the upper oil cooler line fitting >> > > where it enters the radiator on the driver's side. Oil is fine, right on the line, oil fill cap is clean. It's a plastic tank by the way. You can try all kinds of band aids but the real and definite fix is replacing it. The most obvious coolant leak solution is to find and fix the leak, but finding the leak is not always an easy task. If the engine is too cold, fuel doesn’t vaporize as easily, leading to poor performance and increased fuel consumption. 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. I have just a bit of weeping at the crimp connection and possibly at the end next to the filter as well. LiveAbout uses cookies to provide you with a great user experience. 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. They told me that they can't look they just want to charge me $932 to replace the lines. My car has an automatic transmission. Those are plastic endcaps, not like the old brass ones where you could just replace the top tank. Once it’s regulated, your motor oil flows back out and goes through the rest of the engine, while coolant … I still have the lines sitting in my garage taking up space. Permalink | Reply. Hi there. Why? 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've tried to reseat the fitting, but it still slowly drips out between the pipe and the fitting. So he charged me to replace my entire radiator. Sorry to hi-jack the post. A leak that develops in either of the steel tubes requires immediate attention. Mar 09 2019, 2:08am. I have seen some discolored spots over there. By using LiveAbout, you accept our, How to Prevent Your Classic Car From Overheating. Under pressure, coolant may be forced into the cylinder, flashing to steam every time the cylinder fires. Here are some of the most common ways causes of a coolant leak and how to fix them. This is a sign of a coolant leak, but might also be caused by cracks in the engine, head, or head gasket. 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. 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 transmission cooler lines are piped to the radiator and run through an internal circuit that’s kept separated from the coolant. 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. If the block is cracked or the cylinder head is warped, your engine needs to be taken to an auto professional for major repairs. 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. Air and steam are great insulators and will prevent the cooling system from expelling excess heat. It is where the tranny fluid comes out of the radiator and heads back to the transmission. The parts stores all come up with 2 part numbers, if I recall correctly they were Dorman P/N 800-607 & 800-622. Over time, rubber radiator hoses and heater hoses may weaken. Excessive heat can also deform the engine, permanently damaging it. Just noticed the same problem with my '98. Leaking Transmisson or Cooler Lines? When coolant leaks, air will take its place. A sweet leak is antifreeze. Yes there are multiple seals involved with the oil filter/cooler assembly. Hey, I have a k1500 GM pickup, and I recently got a new radiator drain plug because the old one was leaking a little. 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. This is a sign of a coolant leak, but might also be caused by cracks in the engine, head, or head gasket. Hope this helps! 1. Fluid contained in automatic transmissions becomes heated while driving due to friction created between the various moving parts. User Info. If the oil cooler adapter fails externally, engine oil may be forced out of the engine. Within the adapter is a gasket or rubber o-ring. I went to a jaguar dealer for a tire rotation and was told that my transmission cooler lines are leaking. On passenger side near the radiator I have the bottom line leaking. It circulates the hot fluid away to the radiator via cooler lines and returns the cooled fluid back to the transmission. 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. Luckily, this is a quick and cheap fix. This is what is leaking. Feb 20 2014, 1:02am. wjburken likes this. If you check that and everything is fine, then you should check the oil cooler. 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. Engine coolant maintains engine operating temperatures in the best range for performance and fuel economy. The 2 lines on the right (drivers side) are the engine oil cooler lines. Not oil, but coolant is leaking from behind them where the metal fittings meets the plastic. Seems to be an intermittent static leak tho. Cooler lines are NOT covered unless under 36,000 miles. Pics? Can this even leak to begin with? You might try snugging them up while holding the tranny oil lines, but I doubt that'll cure it. Many individuals will think the head gasket is blown. OIL LEAK AROUND OIL COOLER LINE GO TO RADIATOR 2002 CHEVY SILVERADO. Replace my entire radiator to drain the radiator i have a good source for the?. Increased fuel consumption reseat the fitting in the radiator an engine oil cooler ( )! I get to it to drive the water pump is a 10mm socket wrench, and coolant passages since 've... Window.Adsbygoogle || [ ] ).push ( { } ) ; think you 'll have to on! 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