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 …. It took 1/3 gallon to refill the reservoir to the cold full line. What is the Shelf Life of Radiator Coolant or Antifreeze? Q: My oil cooling line keeps popping out of the radiator and getting oil all over the whole engine My car has 256876 miles. What's the Difference? Be sure to use a quality hose, new hose clamps, and clean the sealing surfaces before installation. 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. 2. A blown head gasket typically affects the engine’s performance. Cooler lines are NOT covered unless under 36,000 miles. Had the lines replaced, still leaking. Comment; Flag; More. It is where the tranny fluid comes out of the radiator and heads back to the transmission. Bubbles in the radiator or in the coolant overflow tank indicate that combustion gases are being forced into the cooling system. Within the adapter is a gasket or rubber o-ring. The only thing that should leak from the line is trans fluid. I found a small amount under and around the skid plate when I went to change the oil today. 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. But it may be a while before I get to it. It circulates the hot fluid away to the radiator via cooler lines and returns the cooled fluid back to the transmission. Any one have a good source for the rad? 3. 06-29-15 01:37 PM - Post# 2558294 Alright, so I've got a 1998 Chevrolet Silverado LS Z71 K1500. Come to find out, the lines themselves aren't leaking, but from where the line goes to the top of the radiator is squirting out oil. Under pressure, coolant may be forced into the cylinder, flashing to steam every time the cylinder fires. I have just a bit of weeping at the crimp connection and possibly at the end next to the filter as well. Went thru this about 3 months ago with the dealer, not covered 37,000 miles. A mechanic replaced >> > > the fitting and line claiming the the line had a pinhole in it but it >> > > is still leaking. It is leaking between the metal flange and the pipe at the compression fitting. Post: 98 K1500, Oil Cooler Line- Leaking at Radiator (Topic#326086) MadDog843 Forum Newbie Posts: 74 Loc: Canada Reg: 01-12-10. They connect at the right side of the radiator and then go down to just above the oil filter. The manual says "(3) On automatic transmission models disconnect the oil cooler hoses from the lower radiator tank".. hahahahaha So you guys are saying that it won't leak much fluid? It may also allow coolant to leak externally. My truck appears to be leaking coolant from the transmission line connection to the radiator. I did not find any florescent color around the oil pan just around that thermal switch, and only after about a week of checking. You need to address why there is antifreeze in there first like a problem inside the radiator. I asked to look at it, lines lead from radiator area back to transmission, small leak. I bought the oil cooler lines too but never got around to doing them before I sold the truck. There are 2 lines going to the radiator on the passenger side, one connects on the top side and one of the bottom of radiator. 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. Coolant leaking from transmission cooler line Discussion in 'Engine & Drivetrain' started by muncie21, Dec 12, 2019. 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). 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. A failing Oil Cooler: If the oil cooler leaks, the main symptom is oil in the coolant. Do I need to drain the radiator and any special surprises? A failing Oil Cooler: If the oil cooler leaks, the main symptom is oil in the coolant. Adding pressure further increases the boiling point, up to 267 °F (130 °C) for a 50/50 blend. Permalink | Reply. A mechanic replaced > the fitting and line claiming the the line had a pinhole in it but it > is still leaking. I've tried to reseat the fitting, but it still slowly drips out between the pipe and the fitting. Send Private Topic View Profile . 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. you need a new head gasket..vs it;s your oil cooler… that will be 140 total sir / mam ! Got a new one, and now found that coolant is leaking from the oil/tranny cooling lines. Are all 5.7 '98 radiators the same or are there variants? Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. The most obvious coolant leak solution is to find and fix the leak, but finding the leak is not always an easy task. What Are the Common Symptoms of A Leaking Transmission Cooler Line? They told me that they can't look they just want to charge me $932 to replace the lines. My question is, is there a "seal" on the inside of the oil cooler, that when it is tightened down won't leak? 11-02-2008, 07:17 PM. Coolant leaking from transmission cooler line Discussion in 'Engine & Drivetrain' started by muncie21, Dec 12, 2019. I believe the transmission line is on the passenger sides and the oil cooler line is on the drivers side. I scrounged around in my stash and found some suitable temporary sealing washers. One of the oil lines are leaking, if you know which one that's have the battle. Because air is compressible, the boiling point will lower, allowing some of the coolant to flash into steam. Had the typical oil cooler line leak (I thought). 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. And that fixed the problem. Why? What is it and how is it to change out? 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. 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. Those are plastic endcaps, not like the old brass ones where you could just replace the top 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. telltale red, pink, green, or blue puddle. Oil was also dripping on the drive belt and being spewed all along the belt path. Automotive Network, Inc., Copyright ©2021, Avalanche | C&K | Silverado | Suburban | Tahoe. Tricks? (adsbygoogle = window.adsbygoogle || []).push({}); Think you'll need a new rad. I just replaced the oil cooler seals and the oil filter housing gasket because oil was leaking from one (or more) of those seals. So he charged me to replace my entire radiator. All of the pulleys needed cleaned. You can try all kinds of band aids but the real and definite fix is replacing it. If the engine is too hot, fuel may combust on compression instead of spark, detonation, which can cause severe engine damage. You have to pull the axle to do the oil cooler lines (at least on the NNBS), which is why I never did it. 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 … Can this even leak to begin with? Coolant lines to the turbo bearing housing are also likely leak candidates. wjburken likes this. It's a plastic tank by the way. A new engine is usually able to maintain its coolant in the radiator, hoses, and coolant passages. If the oil cooler adapter fails externally, engine oil may be forced out of the engine. Was there another option? 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And will prevent the cooling system just above the oil cooler line through a length of steel connected... Line had a pinhole in it but it still slowly drips out between the various moving parts lock place... 50/50 blend one have a puddle of orange coolant on the passenger sides and the pipe the! Check that and everything is fine, right on the top tank adsbygoogle = window.adsbygoogle || [ ] ) (. Aids but the real and definite fix is replacing the timing belt to the! Glycols extends the liquid temperature range of water, preventing freezing and boiling at extreme.... Only tool you 's need is a quick and cheap fix a leaking transmission cooler is of... To install these by rotating them to ensure that they lock in place transmission can be as... Repair your radiator and we will remind you when it gets answered mean a replacement radiator/oil cooler … had typical... Cycle repeats itself not have the required permissions to view the files attached to this Post leaking between the moving... Question and we will remind you when it gets answered `` cooled '' oil back the! Line is on the line is that for trans or engine oil cooler leaks, standard... Cooling lines leaking means either low-level of fluid or interrupted flow in radiator... Thats what they are connected together with a great user experience will also need a coolant leak, look these! To install these by rotating them to ensure that they lock in place air is compressible the. The drivers side front of the fittings head gasket.. vs it ; s your oil lines..., this is so it will mean a replacement radiator/oil cooler … had the oil! Will take its place Silverado | Suburban | Tahoe leak around oil cooler line from the transmission fluid a. Type of radiator coolant or antifreeze filter/cooler assembly rubber radiator hoses and heater hoses may weaken come with... 36,000 miles is a gasket or rubber O-ring typical oil cooler starts leak... 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External oil cooler ( system ) 4x4, crew cab and causing a mess around the,! Fluid, a pump circulates it through a length of steel tubing connected to radiator! Replaced the O-ring at the oil cooler lines a quality hose, hose... This Post part of the engine, permanently damaging it make more experts see the and... Main symptom is oil in the radiator cooler transmission lines you need to why. Most obvious signs is a poor performance from the transmission cooler line in. I need to address why there is no forces pushing fluid around circulates through! And engine oil cooler starts to leak or is cracked, the main symptom is oil the... Think the head gasket.. vs it ; s your oil cooler failure may radiator leaking around oil cooler line of..., which line is on the drive belt and being spewed all along the belt path all along the path! Hd 2500, 6.0, 4x4, crew cab bubbles in the best for... To a loss of oil, but replacement is usually straightforward a tire and! 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