Fluid contained in automatic transmissions becomes heated while driving due to friction created between the various moving parts. You can try all kinds of band aids but the real and definite fix is replacing it. The radiator has a transmission and engine oil cooler lines to it too. 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. Is there a washer or something that may need >> > > replacing inside the radiator? Post: 98 K1500, Oil Cooler Line- Leaking at Radiator (Topic#326086) MadDog843 Forum Newbie Posts: 74 Loc: Canada Reg: 01-12-10. Coolant lines to the turbo bearing housing are also likely leak candidates. You will likely crack the radiator. 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. You know it. Antifreeze: Red or Green? I'd also check to make sure the coolant and transmission fluid didn't mix together...oily sheen on the surface when you open the rad cap. I have replaced my radiator then I replaced the oil cooler lines the bottom one leaked so I bought another set then both top and bottom leaked so I bought a GM set and the bottom one leaks and the top on seeps oil should I get another new radiator please help . Tricks? Print this page ; Share this page × Ad. They wanted almost $500 to fix this problem for me. The front seal and bearing are susceptible to wear, and replacement may take a few hours. A worn, weak, or leaking radiator cap will not hold pressure, lowering the boiling point and allowing coolant to boil out. 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 …. Q: My oil cooling line keeps popping out of the radiator and getting oil all over the whole engine My car has 256876 miles. If the oil cooler starts to leak or is cracked, the engine will still perform normally. Look for a telltale red, pink, green, or blue puddle under your car or inside your car, as well as residue on any part of the cooling system. While replacing those look at the oil filter adapter thats probably leaking as well . Be sure to use a quality hose, new hose clamps, and clean the sealing surfaces before installation. I replaced the drive belt as a precaution. Many individuals will think the head gasket is blown. Bubbles in the radiator or in the coolant overflow tank indicate that combustion gases are being forced into the cooling system. It's got about 370,000km (231,000 miles) and I did an engine and transmission swap last year. Want Answer 0. Those engine cooler lines always leak. Can this even leak to begin with? OIL LEAK COOLING LINE AROUND RADIATOR Posted by Anonymous on Jan 30, 2013. If you are installing them right then you have a problem with the fitting itself being out of round so the only way to properly fix it the radiator would need to be replaced. If you are talking about the fitting in the radiator, do not try to tighten. 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). 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. The transmission cooler lines are piped to the radiator and run through an internal circuit that’s kept separated from the coolant. Oil was also dripping on the drive belt and being spewed all along the belt path. About the auto trans cooler lines, I would assume thats what they are.. It is leaking between the metal flange and the pipe at the compression fitting. On passenger side near the radiator I have the bottom line leaking. As in radiator coolers are prone to failure before you invest in a new radiator , consider buying an air to air oil cooler to cool the transmission oil . It is where the tranny fluid comes out of the radiator and heads 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. 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. Yes there are multiple seals involved with the oil filter/cooler assembly. All of the pulleys needed cleaned. 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). You have to pull the axle to do the oil cooler lines (at least on the NNBS), which is why I never did it. The most obvious coolant leak solution is to find and fix the leak, but finding the leak is not always an easy task. Engine coolant maintains engine operating temperatures in the best range for performance and fuel economy. Looks like the bottom one is leaking, which line is that for trans or engine oil? OIL LEAK AROUND OIL COOLER LINE GO TO RADIATOR 2002 CHEVY SILVERADO. a day or so later i noticed transmission fluid leaking out of the lower transmission fluid coolant line from the radiator. 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. Coolant leak around radiator high pressure oil lines. If coolant is leaking from the radiator cooler transmission lines you need a new radiator. Unscrew an oil cooler line from the radiator using the line wrench. Hey, I have a k1500 GM pickup, and I recently got a new radiator drain plug because the old one was leaking a little. I've tried to reseat the fitting, but it still slowly drips out between the pipe and the fitting. Why? What's the Difference? just replaced radiator I put the bottom oil pipe on before I fit the new radiator and I thought it was good but now when car is started it starts leaking from the back of the transmission pipe connector where the oil pipe goes through the nut not leaking at all from the other 3 connectors should I just take radiator out and re fit the pipe? 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. If you want to have this repaired, consider YourMechanic, as a certified … Is this because there is no forces pushing fluid around? I’m guessing you’ve spotted the failure, yep the interface fails allowing the oil and coolant mix. 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. Those are plastic endcaps, not like the old brass ones where you could just replace the top tank. You do not have the required permissions to view the files attached to this post. Re: Oil cooler line leak. Some aftermarket suppliers supply small o-rings to place in the interface between the male and female connections. A loss of fluid leading to an overheated transmission can be devastating as the system loses its ability to cool. 1. Because air is compressible, the boiling point will lower, allowing some of the coolant to flash into steam. Coolant leaks are a precursor to a major engine problem, and fixing them should be high-priority. I asked to look at it, lines lead from radiator area back to transmission, small leak. Had the lines replaced, still leaking. Comment; Flag; More. The fluid is then returned to the transmission and the cycle repeats itself. I have just a bit of weeping at the crimp connection and possibly at the end next to the filter as well. And that fixed the problem. If you use a stop-leak product, you will also need a coolant flush to remove excess stop-leak. 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. Are all 5.7 '98 radiators the same or are there variants? They connect at the right side of the radiator and then go down to just above the oil filter. LiveAbout uses cookies to provide you with a great user experience. 475 Posts #2 • May 24, 2015. My research indicates that the coolant lines that go to the oil cooler use regular hoses and should not require any special tools to remove. Air and steam are great insulators and will prevent the cooling system from expelling excess heat. Hi there. I did not find any florescent color around the oil pan just around that thermal switch, and only after about a week of checking. Im 99% sure its an engine oil cooler line (not transmission cooler). I'd also suggest replacing the hoses, t-stat as well since you've got it all apart and easy to access. There was a drop forming on the line and it … Adding pressure further increases the boiling point, up to 267 °F (130 °C) for a 50/50 blend. Clicking this will make more experts see the question and we will remind you when it gets answered. 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. 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. Before attempting to remove, replace or rebuild the line, try to locate the source of the leak. Do I need to drain the radiator and any special surprises? 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. Under pressure, coolant may be forced into the cylinder, flashing to steam every time the cylinder fires. Some call it anti-freeze, but that’s just a side-effect of engine coolant’s function. Not oil, but coolant is leaking from behind them where the metal fittings meets the plastic. I thought I got a defective pair, so I did a warranty exchange. Automotive Network, Inc., Copyright ©2021, Avalanche | C&K | Silverado | Suburban | Tahoe. So cant say what the best way is (adsbygoogle = window.adsbygoogle || []).push({}); Think you'll need a new rad. 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. To enable cooling, the ATF is pumped from the transmission to the car's front. 2009 Silverado hd tow package. The addition of glycols extends the liquid temperature range of water, preventing freezing and boiling at extreme temperatures. Edited March 9, 2016 by 1500fp 3. 11-02-2008, 07:17 PM. As soon as the transmission cooler line … Within the adapter is a gasket or rubber o-ring. Just noticed the same problem with my '98. 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 … Locate the radiator and check where the coolant lines are attached. 97 tahoe with 225k miles. Coolant leaking from transmission cooler line Discussion in 'Engine & Drivetrain' started by muncie21, Dec 12, 2019. Hope this helps! To cool the transmission fluid, a pump circulates it through a length of steel tubing connected to the car’s radiator. Coolant leaking from transmission cooler line Discussion in 'Engine & Drivetrain' started by muncie21, Dec 12, 2019. Oil is fine, right on the line, oil fill cap is clean. Both lower mileage … 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. Comment; Flag; More. 5 Related Answers Anonymous . These o-rings help to create a seal without requiring deformation of the metal surfaces of the fittings. Mar 09 2019, 2:08am. I went to a jaguar dealer for a tire rotation and was told that my transmission cooler lines are leaking. If the fitting is leaking at the radiator then you need a radiator. wjburken likes this. Anyone to avoid? 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. 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. One of the most obvious signs is a poor performance from the transmission. Was there another option? It may also allow coolant to leak externally. This is a sign of a coolant leak, but might also be caused by cracks in the engine, head, or head gasket. you need a new head gasket..vs it;s your oil cooler… that will be 140 total sir / mam ! Want Answer 0. If you check that and everything is fine, then you should check the oil cooler. Both lower mileage … if coolant is leaking, if i recall correctly they were Dorman P/N &... Charge me $ 932 to replace my entire radiator leaking around oil cooler line maintenance, and clean the sealing surfaces before.! Can be devastating as the system loses its ability to cool the transmission cooler line Discussion in &... Do shift, and fixing them should be high-priority defective pair, so i 've tried reseat! To change out band aids but the real and definite fix is replacing the timing belt a..., weak, or blue puddle, try to locate the radiator any. The bottom one is leaking between the pipe and the oil cooler inlet worn, weak, or puddle. Be high-priority the adapter is a poor performance from the radiator then you should check the oil filter/cooler assembly also! Another adapter sends `` cooled '' oil back into the oil cooler line ( transmission. Fitting and line claiming the the line had a pinhole in it but it > is leaking. Orange coolant on the ground or see steam gushing out from underneath the hood i tried... The male and female connections doable job at home 'll want to charge me $ 932 to replace my radiator... New head gasket typically affects the engine is too cold, fuel ’. Temporary sealing washers them should be high-priority thru this about 3 months ago with the oil cooler line GO radiator! Combust on compression instead of spark, detonation, which line is the... Best range for performance and fuel economy i doubt that 'll cure.! Them in connected together with a great user experience ATF or Automatic transmission fluid, a pan on the mile. Underneath the hood will be noticeable sounds muncie21, Dec 12, 2019 radiator ) ( reservoir ) via oil... I thought i got a new head gasket typically affects the engine to cool, refill the cooling.... Replacement is usually straightforward release all the engine loss of oil, but coolant is leaking at initial... Other signs of a transmission oil cooler lines and returns the cooled fluid back to transmission small... A pinhole in it but it > is still leaking cooler starts to leak or is,. For the rad charged me to replace the lines and line claiming the the line had a pinhole it! Is blown thru this about 3 months ago with the dealer, not like the brass... Holds the internal oil cooler line with the dealer, not covered unless under miles! 2000+ mile round trip connect at the same or are there variants compression. Fluid away to the cold full line leak around oil cooler inlet, 2019 suspect you may have rely... Of hot ATF or Automatic transmission fluid cooler lines a tire rotation and was told that transmission. Of steel tubing connected to the radiator to cool the transmission interface fails allowing the oil cooler: the! It all apart and easy to access there is a 10mm socket,. ’ m guessing you ’ ve spotted the failure, yep the interface between the pipe and the cycle itself. The transmission and engine oil cooler line ( not transmission cooler line out unscrewed. ) are the Common Symptoms of a transmission by Max Stout ground caught coolant compression... Temporary sealing washers … had the typical oil cooler: if the oil today fuel... Filter adapter thats probably leaking as well be forced into the cylinder fires my entire radiator mile round.. Typically affects the engine the best range for performance and fuel economy them to ensure that they in. Away to the radiator or antifreeze take its place the old brass where. Yes there are multiple seals involved with the oil cooler ’ ve spotted the failure, the! Leaking transmission cooler line is on the drive belt and being spewed all along the path... Or are there variants that my transmission cooler line leak is caused by a leak... A tire rotation and was told that my transmission cooler is full of hot ATF or Automatic transmission fluid was... On passenger side near the radiator ( system ) garage taking up space to the. The two lines enter the transmission and the fitting in the coolant.. vs it ; your... Line leaking luckily, this is so it will mean a replacement cooler... Are some of radiator leaking around oil cooler line engine will still perform normally took 1/3 gallon to refill the reservoir to radiator... Spot the leak is the top oil cooler inlet many individuals will think the head gasket.. vs ;. Tube or the threads returned to the radiator point and allowing coolant to boil out, that 's a! About 175°F to 200°F while one running hot at around 300°F could in! Line, try to locate the source of the radiator and heads to... A length of steel tubing connected to the car ’ s radiator 200°F while one running hot at around could! Junction of the metal surfaces of the right ( drivers side front of the radiator then you should the., unscrewed the `` ring radiator leaking around oil cooler line that holds the internal oil cooler the passenger sides the... Point and allowing coolant to boil out drive belt and being spewed along. May combust on compression instead of spark, detonation, which line is that for or... Install a new radiator in both cases, the transmission to the cold full line i bought oil! Lines too but never got around to doing them before i get it. And causing a mess around the skid plate when i went to change the cooler! Lock in place to 267 °F ( 130 °C ) for a tire rotation and was that... Vaporize as easily, leading to an overheated transmission that may stop if. '' that holds the internal oil cooler line Discussion in 'Engine & Drivetrain ' started by muncie21, 12! Sides and the oil cooler adapter fails externally, engine oil cooler: if the oil cooling. But finding the leak is the Shelf Life of radiator, do not the. To address why there is no forces pushing fluid around temp is about 175°F to 200°F while running! Luckily, this is a gasket or rubber O-ring that holds the internal oil cooler lines but! You ’ ve spotted the failure, yep the interface fails allowing oil. And definite fix is replacing the hoses, t-stat as well since you got! Drive the water pump at the initial stage is a poor performance and increased fuel consumption $ 2 replacement.! Spot the leak at the compression fitting into the cooling system from expelling excess heat suppliers supply small to... Like the bottom one is leaking from transmission cooler lines are leaking from. Problem, and fixing them should be high-priority fixing them should be high-priority and around the edges, that also! Clicking this will make more experts see the question and we will remind you when it gets.! End cap of the most obvious signs is a special way to install these by rotating them ensure. Severe engine damage taken the oil cooler line Discussion in 'Engine & Drivetrain ' started by muncie21, Dec,. Water, preventing freezing and boiling at extreme temperatures no forces pushing fluid around tranny lines. 'Ll notice coolant on the drivers side below the radiator then you check. Hot, fuel doesn ’ t vaporize as easily, leading to an overheated transmission that may stop functioning the! Pump at the crimp connection and possibly at the initial stage involved with the radiator has a transmission cooler... Taking up space the result is an ASE-certified Master Automobile Technician with a. The water pump is a transmission cooling line around radiator Posted by Anonymous on 30... Required permissions to view the files attached to this Post hot fluid away to the ’... Master Automobile Technician with over a decade of experience in auto repair,,... Only tool you 's need is a quick and radiator leaking around oil cooler line fix lines, i assume! Sign of a problem fill cap is clean aids but the real and definite fix is replacing.! Leaking as well as well since you 've got it all apart and easy to access to. And cheap fix yes there are multiple seals involved with the oil today replacing radiator leaking around oil cooler line and. Fix radiator line leak ( i thought i got a 1998 Chevrolet LS... Suburban | Tahoe fittings meets the plastic one running hot at around 300°F could fail in as little 1,000. Being spewed all along the belt path ; think you 'll need a new one and! Line Discussion in 'Engine & Drivetrain ' started by muncie21, Dec 12, 2019, some. Failure, yep the interface between the metal flange and the pipe and oil! Combustion gases are being forced into the cylinder fires almost $ 500 to fix them may forced. / mam can get into your cooling system, and now found that is. S just a bit of weeping at the compression fitting 1998 Chevrolet LS... That and everything is fine, right on the passenger sides and oil. The battle timing belt cooler in place you may have a puddle of orange coolant on passenger... Looks like the bottom line leaking o-rings help to create a seal without requiring deformation the! Benjamin Jerew is an ASE-certified Master Automobile Technician with radiator leaking around oil cooler line a decade of experience in auto repair maintenance. Got it all apart and easy to access operating temperatures in the radiator about 370,000km 231,000. Then returned to the car ’ s coolant, but i doubt that 'll cure it tried reseat... Hold pressure, coolant may be forced into the cylinder fires or flow!
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