You do not have the required permissions to view the files attached to this post. A sweet leak is antifreeze. Bubbles in the radiator or in the coolant overflow tank indicate that combustion gases are being forced into the cooling system. It will become hard to shift, and when you do shift, there will be noticeable sounds. Some aftermarket suppliers supply small o-rings to place in the interface between the male and female connections. It may also allow coolant to leak externally. Just noticed the same problem with my '98. OIL LEAK AROUND OIL COOLER LINE GO TO RADIATOR 2002 CHEVY SILVERADO. 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. Locate the radiator and check where the coolant lines are attached. If you are talking about the fitting in the radiator, do not try to tighten. To cool the transmission fluid, a pump circulates it through a length of steel tubing connected to the car’s radiator. 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? The most obvious sign of a transmission cooling line leak is the presence of transmission fluid. But it may be a while before I get to it. Many individuals will think the head gasket is blown. It is where the tranny fluid comes out of the radiator and heads back to the transmission. Definitely doable. you need a new head gasket..vs it;s your oil cooler… that will be 140 total sir / mam ! Sometimes, it is difficult to spot the leak at the initial stage. User Info. 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. 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. 11-02-2008, 07:17 PM. The adapter connects oil lines to the cooler itself and another adapter sends "cooled" oil back into the oil pan. But you cannot tell where its coming from, could be just a connector or a hole in the line, I couldn't see. Chances are, you'll have to pull the catalytic converter to track it down. It circulates the hot fluid away to the radiator via cooler lines and returns the cooled fluid back to the transmission. You have to pull the axle to do the oil cooler lines (at least on the NNBS), which is why I never did it. What Are the Common Symptoms of A Leaking Transmission Cooler Line? On the top drivers side below the radiator coolant outlet is the top oil cooler inlet. Mar 09 2019, 2:08am. Is this because there is no forces pushing fluid around? Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. 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. You know it. This is a sign of a coolant leak, but might also be caused by cracks in the engine, head, or head gasket. 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. Want Answer 0. If the coolant leak is caused by a radiator leak, you'll want to repair your radiator. Comment; Flag; More. Truck is an HD 2500, 6.0, 4x4, crew cab. 1. 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 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. tbruz. No more leaks from that location on the 2000+ mile round trip. 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. Leaking Transmisson or Cooler Lines? Similar to a loss of oil, an external oil cooler failure may force all of the engine coolant out of the engine. 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. However, damage, wear, corrosion, and other problems can easily cause coolant leaks. See sketch below. Just wait for the engine to cool, refill the cooling system, and install a new radiator cap. 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. Where the two lines enter the transmission they are connected together with a bolt holding them in. What's the Difference Between Antifreeze and Coolant? A small type of radiator, the transmission cooler is full of hot ATF or Automatic Transmission Fluid. They told me that they can't look they just want to charge me $932 to replace the lines. This is what is leaking. 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. To enable cooling, the ATF is pumped from the transmission to the car's front. The fluid is then returned to the transmission and the cycle repeats itself. telltale red, pink, green, or blue puddle. Hi there. If the fitting is leaking at the radiator then you need a radiator. Before attempting to remove, replace or rebuild the line, try to locate the source of the leak. You will likely crack the radiator. If the oil cooler adapter fails externally, engine oil may be forced out of the engine. Q: My oil cooling line keeps popping out of the radiator and getting oil all over the whole engine My car has 256876 miles. A new engine is usually able to maintain its coolant in the radiator, hoses, and coolant passages. 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. In both cases, the result is an overheated transmission that may stop functioning if the condition persists. Post: 98 K1500, Oil Cooler Line- Leaking at Radiator (Topic#326086) MadDog843 Forum Newbie Posts: 74 Loc: Canada Reg: 01-12-10. I did not find any florescent color around the oil pan just around that thermal switch, and only after about a week of checking. Many individuals will think the head gasket is blown. If you use a stop-leak product, you will also need a coolant flush to remove excess stop-leak. The parts stores all come up with 2 part numbers, if I recall correctly they were Dorman P/N 800-607 & 800-622. Coolant leaks are a precursor to a major engine problem, and fixing them should be high-priority. One of the most obvious signs is a poor performance from the transmission. If you are leaking coolant from the line itself then you have coolant in your trans fluid. 5 Related Answers Anonymous . I'd also suggest replacing the hoses, t-stat as well since you've got it all apart and easy to access. 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. This is a sign of a coolant leak, but might also be caused by cracks in the engine, head, or head gasket. What's the Difference? Seems to be an intermittent static leak tho. Not oil, but coolant is leaking from behind them where the metal fittings meets the plastic. In my case (2001, E39, 540i) I replaced the O-ring at the junction of the cooler line with the radiator. 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). Permalink | Reply. Here are some of the most common ways causes of a coolant leak and how to fix them. The front seal and bearing are susceptible to wear, and replacement may take a few hours. A blown head gasket typically affects the engine’s performance. A loss of fluid leading to an overheated transmission can be devastating as the system loses its ability to cool. They wanted almost $500 to fix this problem for me. There was a drop forming on the line and it … 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. A leaking water pump is a more difficult replacement, particularly on vehicles that use the timing belt to drive the water pump. 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. Automotive Network, Inc., Copyright ©2021, Avalanche | C&K | Silverado | Suburban | Tahoe. I have a coolant leak on the drivers side end cap of the radiator. 97 tahoe with 225k miles. Because air is compressible, the boiling point will lower, allowing some of the coolant to flash into steam. 2009 Silverado hd tow package. 5 Related Answers Anonymous . Edited March 9, 2016 by 1500fp Went thru this about 3 months ago with the dealer, not covered 37,000 miles. 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. Within the adapter is a gasket or rubber o-ring. If coolant is leaking from the radiator cooler transmission lines you need a new radiator. Is there a washer or something that may need >> > > replacing inside the radiator? Once it’s regulated, your motor oil flows back out and goes through the rest of the engine, while coolant … Bubbles in the radiator or in the coolant overflow tank indicate that combustion gases are being forced into the cooling system. They connect at the right side of the radiator and then go down to just above the oil filter. The most obvious coolant leak solution is to find and fix the leak, but finding the leak is not always an easy task. Do I need to drain the radiator and any special surprises? 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. 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. Looks like the bottom one is leaking, which line is that for trans or engine oil? Oil can get into your cooling system ( radiator ) ( reservoir ) via your oil cooler ( system ). 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). 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. Im 99% sure its an engine oil cooler line (not transmission cooler). I believe the transmission line is on the passenger sides and the oil cooler line is on the drivers side. Anyone to avoid? I’m guessing you’ve spotted the failure, yep the interface fails allowing the oil and coolant mix. This fall, a pan on the ground caught coolant. If the block is cracked or the cylinder head is warped, your engine needs to be taken to an auto professional for major repairs. Replace the radiator! Oil cooler lines will usually leak oil, as oil is what flows through those lines. 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. All summer I thought it was AC condensation. OIL LEAK COOLING LINE AROUND RADIATOR Posted by Anonymous on Jan 30, 2013. 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