It's a plastic tank by the way. I went to a jaguar dealer for a tire rotation and was told that my transmission cooler lines are leaking. I've tried to reseat the fitting, but it still slowly drips out between the pipe and the fitting. Tricks? Leaking Transmisson or Cooler Lines? 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. Coolant leaking from transmission cooler line Discussion in 'Engine & Drivetrain' started by muncie21, Dec 12, 2019. I have just a bit of weeping at the crimp connection and possibly at the end next to the filter as well. All summer I thought it was AC condensation. The most obvious coolant leak solution is to find and fix the leak, but finding the leak is not always an easy task. 247,000 miles. On passenger side near the radiator I have the bottom line leaking. Some aftermarket suppliers supply small o-rings to place in the interface between the male and female connections. Sometimes, it is difficult to spot the leak at the initial stage. A failing Oil Cooler: If the oil cooler leaks, the main symptom is oil in the coolant. By using LiveAbout, you accept our, How to Prevent Your Classic Car From Overheating. 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. A blown head gasket typically affects the engine’s performance. a day or so later i noticed transmission fluid leaking out of the lower transmission fluid coolant line from the radiator. Once it’s regulated, your motor oil flows back out and goes through the rest of the engine, while coolant … Those are plastic endcaps, not like the old brass ones where you could just replace the top tank. User Info. If you check that and everything is fine, then you should check the oil cooler. wjburken likes this. Oil was also dripping on the drive belt and being spewed all along the belt path. A sweet leak is antifreeze. A burst hose will quickly release all the engine’s coolant, but replacement is usually straightforward. Those engine cooler lines always leak. 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. You know it. 1. Marv Beasley On March 3, 2013 at 8:47 pm. Is this because there is no forces pushing fluid around? 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. 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. You need to address why there is antifreeze in there first like a problem inside the radiator. Taste the leak to see if it's sweet. The most obvious sign of a transmission cooling line leak is the presence of transmission fluid. If the engine is too hot, fuel may combust on compression instead of spark, detonation, which can cause severe engine damage. https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-oil-cooler Adding pressure further increases the boiling point, up to 267 °F (130 °C) for a 50/50 blend. If you are leaking coolant from the line itself then you have coolant in your trans fluid. I thought I got a defective pair, so I did a warranty exchange. Transmission cooler line leak symptoms . Many individuals will think the head gasket is blown. The addition of glycols extends the liquid temperature range of water, preventing freezing and boiling at extreme temperatures. All of the pulleys needed cleaned. 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? It took 1/3 gallon to refill the reservoir to the cold full line. A worn, weak, or leaking radiator cap will not hold pressure, lowering the boiling point and allowing coolant to boil out. Definitely doable. 2. 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. One of the oil lines are leaking, if you know which one that's have the battle. Unscrew an oil cooler line from the radiator using the line wrench. Just noticed the same problem with my '98. Chances are, you'll have to pull the catalytic converter to track it down. 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. A loss of fluid leading to an overheated transmission can be devastating as the system loses its ability to cool. 5 Related Answers Anonymous . In both cases, the result is an overheated transmission that may stop functioning if the condition persists. 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 LEAK COOLING LINE AROUND RADIATOR Posted by Anonymous on Jan 30, 2013. Over time, rubber radiator hoses and heater hoses may weaken. Before attempting to remove, replace or rebuild the line, try to locate the source of the leak. Clicking this will make more experts see the question and we will remind you when it gets answered. Excessive heat can also deform the engine, permanently damaging it. 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. 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. It circulates the hot fluid away to the radiator via cooler lines and returns the cooled fluid back to the transmission. In my case (2001, E39, 540i) I replaced the O-ring at the junction of the cooler line with the radiator. It's got about 370,000km (231,000 miles) and I did an engine and transmission swap last year. Im 99% sure its an engine oil cooler line (not transmission cooler). you need a new head gasket..vs it;s your oil cooler… that will be 140 total sir / mam ! A mechanic replaced > the fitting and line claiming the the line had a pinhole in it but it > is still leaking. Hope this helps! 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. If you are talking about the fitting in the radiator, do not try to tighten. Engine coolant leaking from oil cooler. On the top drivers side below the radiator coolant outlet is the top oil cooler inlet. Had the typical oil cooler line leak (I thought). Post: 98 K1500, Oil Cooler Line- Leaking at Radiator (Topic#326086) MadDog843 Forum Newbie Posts: 74 Loc: Canada Reg: 01-12-10. 5 Related Answers Anonymous . Cooler lines are NOT covered unless under 36,000 miles. 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). This fall, a pan on the ground caught coolant. 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's the Difference Between Antifreeze and Coolant? I just replaced the oil cooler seals and the oil filter housing gasket because oil was leaking from one (or more) of those seals. Because the radiator is exposed, there are a few different ways it can fail, including corrosion, debris damage, and even minor impact. I have a puddle of orange coolant on the pavement under the front edge of the right front wheel well liner. Send Private Topic View Profile . 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. It is leaking coolant not oil. 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. 3. A failing Oil Cooler: If the oil cooler leaks, the main symptom is oil in the coolant. I still have the lines sitting in my garage taking up space. Coolant lines to the turbo bearing housing are also likely leak candidates. HA HA i laughed at them. Because air is compressible, the boiling point will lower, allowing some of the coolant to flash into steam. Do I need to drain the radiator and any special surprises? To cool the transmission fluid, a pump circulates it through a length of steel tubing connected to the car’s radiator. Had the lines replaced, still leaking. They told me that they can't look they just want to charge me $932 to replace the lines. 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. LiveAbout uses cookies to provide you with a great user experience.