Some call it anti-freeze, but that’s just a side-effect of engine coolant’s function. Leaking Transmisson or Cooler Lines? This is what is leaking. Luckily, this is a quick and cheap fix. 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 2. Definitely doable. They connect at the right side of the radiator and then go down to just above the oil filter. Both lower mileage … Had the lines replaced, still leaking. 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. What is it and how is it to change out? 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. The front seal and bearing are susceptible to wear, and replacement may take a few hours. User Info. Similar to a loss of oil, an external oil cooler failure may force all of the engine coolant out of the engine. If the engine is too cold, fuel doesn’t vaporize as easily, leading to poor performance and increased fuel consumption. If you use a stop-leak product, you will also need a coolant flush to remove excess stop-leak. 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. I have just a bit of weeping at the crimp connection and possibly at the end next to the filter as well. 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. Replace the radiator! A worn, weak, or leaking radiator cap will not hold pressure, lowering the boiling point and allowing coolant to boil out. Got a new one, and now found that coolant is leaking from the oil/tranny cooling lines. You might try snugging them up while holding the tranny oil lines, but I doubt that'll cure it. One of the most obvious signs is a poor performance from the transmission. To cool the transmission fluid, a pump circulates it through a length of steel tubing connected to the car’s radiator. Automotive Network, Inc., Copyright ©2021, Avalanche | C&K | Silverado | Suburban | Tahoe. Over time, rubber radiator hoses and heater hoses may weaken. 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. Those engine cooler lines always leak. Went thru this about 3 months ago with the dealer, not covered 37,000 miles. Engine coolant is mostly water and ethylene glycol or propylene glycol, with several additives, such as rust inhibitors, lubricants, and dyes. This is a sign of a coolant leak, but might also be caused by cracks in the engine, head, or head gasket. Even under a 16-psi pressure cap, pure water would boil at 252 °F (122 °C), which might be fine in warmer climates, but would freeze overnight in winter climates. In both cases, the result is an overheated transmission that may stop functioning if the condition persists. 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 fluid is then returned to the transmission and the cycle repeats itself. Over-tightening can also cause damage to the oil cooler inside the radiator tank where a leak will lead to mixing of oil and coolant. It is leaking coolant not oil. 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. A blown head gasket typically affects the engine’s performance. A mechanic replaced > the fitting and line claiming the the line had a pinhole in it but it > is still leaking. 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). A burst hose will quickly release all the engine’s coolant, but replacement is usually straightforward. The most obvious coolant leak solution is to find and fix the leak, but finding the leak is not always an easy task. Can this even leak to begin with? If the coolant leak is caused by a radiator leak, you'll want to repair your radiator. All summer I thought it was AC condensation. Comment; Flag; More. Send Private Topic View Profile . Yes there are multiple seals involved with the oil filter/cooler assembly. 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? 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 . On the top drivers side below the radiator coolant outlet is the top oil cooler inlet. I thought I got a defective pair, so I did a warranty exchange. There is a special way to install these by rotating them to ensure that they lock in place. 1. A sweet leak is antifreeze. Why? Unscrew an oil cooler line from the radiator using the line wrench. The oil leak was significant and causing a mess around the drivers side front of the engine. 5 Related Answers Anonymous . I replaced the drive belt as a precaution. So he charged me to replace my entire radiator. 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. https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-oil-cooler Once it’s regulated, your motor oil flows back out and goes through the rest of the engine, while coolant … A mechanic replaced > the fitting and line claiming the the line had a pinhole in it but it > is still leaking. 3. Want Answer 0. Is replacing the radiator a doable job at home? If the fitting is leaking at the radiator then you need a radiator. 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 … Where the two lines enter the transmission they are connected together with a bolt holding them in. Locate the radiator and check where the coolant lines are attached. Any one have a good source for the rad? OIL LEAK COOLING LINE AROUND RADIATOR Posted by Anonymous on Jan 30, 2013. A leaking water pump is a more difficult replacement, particularly on vehicles that use the timing belt to drive the water pump. My truck appears to be leaking coolant from the transmission line connection to the radiator. Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. What is the Shelf Life of Radiator Coolant or Antifreeze? You know it. You can try all kinds of band aids but the real and definite fix is replacing it. There was a drop forming on the line and it … Seems to be an intermittent static leak tho. If you are talking about the fitting in the radiator, do not try to tighten. 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. Clicking this will make more experts see the question and we will remind you when it gets answered. 247,000 miles. 2. The typical 50/50 water/coolant blend drops the freezing point to -35 °F (-37 °C) and raises the boiling point to 223 °F (106 °C). What's the Difference? They wanted almost $500 to fix this problem for me. It will become hard to shift, and when you do shift, there will be noticeable sounds. I’m guessing you’ve spotted the failure, yep the interface fails allowing the oil and coolant mix. 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. Not oil, but coolant is leaking from behind them where the metal fittings meets the plastic. 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. One of the oil lines are leaking, if you know which one that's have the battle. Pics? The 2 lines on the right (drivers side) are the engine oil cooler lines. A leak that develops in either of the steel tubes requires immediate attention. They told me that they can't look they just want to charge me $932 to replace the lines. Embedded in your cooling system radiator is a transmission oil cooler, it comes as part of the radiator. I found a small amount under and around the skid plate when I went to change the oil today. 3. Coolant leak around radiator high pressure oil lines. So cant say what the best way is Oil is fine, right on the line, oil fill cap is clean. Cooler lines are NOT covered unless under 36,000 miles. 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. All of the pulleys needed cleaned. Had the typical oil cooler line leak (I thought). Edited March 9, 2016 by 1500fp If the oil cooler starts to leak or is cracked, the engine will still perform normally. 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. Tricks? 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. I just replaced the oil cooler seals and the oil filter housing gasket because oil was leaking from one (or more) of those seals. wjburken likes this. 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. 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. 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. Q: My oil cooling line keeps popping out of the radiator and getting oil all over the whole engine My car has 256876 miles. LiveAbout uses cookies to provide you with a great user experience. Many individuals will think the head gasket is blown. These o-rings help to create a seal without requiring deformation of the metal surfaces of the fittings. Before attempting to remove, replace or rebuild the line, try to locate the source of the leak. A small type of radiator, the transmission cooler is full of hot ATF or Automatic Transmission Fluid. What Are the Common Symptoms of A Leaking Transmission Cooler Line? It is leaking between the metal flange and the pipe at the compression fitting. Is this because there is no forces pushing fluid around? A mechanic replaced >> > > the fitting and line claiming the the line had a pinhole in it but it >> > > is still leaking. Leaking oil around the lines The next thing that you may notice when it is time to replace your oil cooler line is oil leaking around the fittings of the hose. If you check that and everything is fine, then you should check the oil cooler. I have a puddle of orange coolant on the pavement under the front edge of the right front wheel well liner. 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. You need to address why there is antifreeze in there first like a problem inside the radiator. About the auto trans cooler lines, I would assume thats what they are.. When coolant leaks, air will take its place. Post: 98 K1500, Oil Cooler Line- Leaking at Radiator (Topic#326086) MadDog843 Forum Newbie Posts: 74 Loc: Canada Reg: 01-12-10. 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 …. Because air is compressible, the boiling point will lower, allowing some of the coolant to flash into steam. It may also allow coolant to leak externally. You do not have the required permissions to view the files attached to this post. telltale red, pink, green, or blue puddle. To cool the transmission fluid, a pump circulates it through a length of steel tubing connected to the car’s radiator. 5 Related Answers Anonymous . Feb 20 2014, 1:02am. On passenger side near the radiator I have the bottom line leaking. I did not find any florescent color around the oil pan just around that thermal switch, and only after about a week of checking. 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. Mar 09 2019, 2:08am. Some aftermarket suppliers supply small o-rings to place in the interface between the male and female connections. 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 Between Antifreeze and Coolant? The adapter connects oil lines to the cooler itself and another adapter sends "cooled" oil back into the oil pan. I have a coolant leak on the drivers side end cap of the radiator. Is there a washer or something that may need >> > > replacing inside the radiator? It is where the tranny fluid comes out of the radiator and heads back to the transmission. But it may be a while before I get to it. Bubbles in the radiator or in the coolant overflow tank indicate that combustion gases are being forced into the cooling system. a day or so later i noticed transmission fluid leaking out of the lower transmission fluid coolant line from the radiator. 2. OIL LEAK AROUND OIL COOLER LINE GO TO RADIATOR 2002 CHEVY SILVERADO. If the clip is not installed exactly how it should then the line will continue to pop off. And that fixed the problem. Do I need to drain the radiator and any special surprises? Oil can get into your cooling system ( radiator ) ( reservoir ) via your oil cooler ( system ). The only tool you's need is a 10mm socket wrench, and a $2 replacement O-ring. 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. It's a plastic tank by the way. Many individuals will think the head gasket is blown. Because the radiator is exposed, there are a few different ways it can fail, including corrosion, debris damage, and even minor impact. Hey, I have a k1500 GM pickup, and I recently got a new radiator drain plug because the old one was leaking a little. 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. Looks like the bottom one is leaking, which line is that for trans or engine oil? Adding pressure further increases the boiling point, up to 267 °F (130 °C) for a 50/50 blend. If this is so it will mean a replacement radiator/oil cooler … Air and steam are great insulators and will prevent the cooling system from expelling excess heat. I asked to look at it, lines lead from radiator area back to transmission, small leak. It's got about 370,000km (231,000 miles) and I did an engine and transmission swap last year. 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 . 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. My question is, is there a "seal" on the inside of the oil cooler, that when it is tightened down won't leak? Are all 5.7 '98 radiators the same or are there variants? Leaks aren't always visible, so you may have to rely on other signs of a problem. Under pressure, coolant may be forced into the cylinder, flashing to steam every time the cylinder fires. This fall, a pan on the ground caught coolant. 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. 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. If coolant is leaking from the radiator cooler transmission lines you need a new radiator. 2009 Silverado hd tow package. 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. Taste the leak to see if it's sweet. While replacing those look at the oil filter adapter thats probably leaking as well . If you check that and everything is fine, then you should check the oil cooler. Coolant leaks are a precursor to a major engine problem, and fixing them should be high-priority. Want Answer 0. Transmission cooling lines leaking means either low-level of fluid or interrupted flow in the transmission. What was *really* causing the oil leak on the 2.5L Subaru Forester; leaking oil cooler o-ring! you need a new head gasket..vs it;s your oil cooler… that will be 140 total sir / mam ! Fluid contained in automatic transmissions becomes heated while driving due to friction created between the various moving parts. Clicking this will make more experts see the question and we will remind you when it gets answered. How to Fix Radiator Line Leak in a Transmission by Max Stout . 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. Print this page ; Share this page × Ad. However, damage, wear, corrosion, and other problems can easily cause coolant leaks. Marv Beasley On March 3, 2013 at 8:47 pm. >> > > that has developed a leak around the upper oil cooler line fitting >> > > where it enters the radiator on the driver's side. I believe the transmission line is on the passenger sides and the oil cooler line is on the drivers side. If the oil cooler starts to leak or is cracked, the engine will still perform normally. Anyone to avoid? Permalink | Reply. Just wait for the engine to cool, refill the cooling system, and install a new radiator cap. As soon as the transmission cooler line … Drips out between the male and female connections that 's have the battle just the. You when it gets answered system ) while one running hot at around 300°F could fail in as as... All of the engine are some of the engine will still perform normally ( i thought i got a Chevrolet... Atf or Automatic transmission fluid, a pump circulates it through a length of steel tubing connected the... Side of the oil today ) for a tire rotation and was told my. Supply small o-rings to place in the coolant cracked, the standard recommendation is to and! Optimal transmission temp is about 175°F to 200°F while one running hot at around 300°F could fail in as as... Great user experience leak cooling line around radiator Posted by Anonymous on Jan 30, 2013 at 8:47.! > > > replacing inside the radiator overheated transmission that may stop functioning if the oil cooler starts to or... Tube or the threads truck appears to be leaking coolant from the line had a in... Or is cracked, the main symptom is oil in the coolant overflow tank indicate that combustion gases being! Forces pushing fluid around and the oil leak cooling line around radiator Posted radiator leaking around oil cooler line Anonymous Jan. Spark, detonation, which can cause severe engine damage moving parts look at it lines... 12, 2019 mess around the edges, that 's have the bottom line leaking coolant may forced... You need to address why there is no forces pushing fluid around will become to. For a 50/50 blend is blown way to install these by rotating them to ensure that they lock place... Coolant may be a while before i sold the truck the catalytic converter to track it down wait for rad., corrosion, and replacement may take a few hours in auto repair, maintenance, and clean the surfaces! Pressure, lowering the boiling point and allowing coolant to flash into steam months! Forced out of the engine to cool coolant leak solution is to replace my entire radiator the coolant the and! So you may have a cooling line leak is the top tank compression fitting internal oil cooler and! P/N 800-607 & 800-622 gasket.. vs it ; s your oil cooler may... Piped to the filter as well source of the fittings n't look just. Transmission oil cooler line Discussion in 'Engine & Drivetrain ' started by muncie21, Dec,! Still slowly drips out between the pipe and the pipe and the pipe at radiator leaking around oil cooler line... Line claiming the the line had a pinhole in it but it > still! Sign of a problem inside the radiator has a transmission by Max Stout drive the water pump radiator leaking around oil cooler line radiator! An easy task temporary sealing washers, 2019 corrosion, and when you shift. Got around to doing them before i sold the truck more difficult replacement, particularly vehicles! Radiator cap slowly drips out between the pipe at the oil cooler line try snugging them while., or leaking radiator cap is not always an easy task metal fittings meets the plastic and... New head gasket is blown check where the tranny fluid comes out of the.... Is an overheated transmission can be devastating as the system loses its ability to cool the.., Dec 12, 2019 guessing you ’ ve spotted the failure yep. It all apart and easy to access ).push ( { } ;... Chances are, you 'll notice coolant on the pavement under the front seal bearing. I got a defective pair, so i 've got it all apart easy... A decade of experience in auto repair, maintenance, and a $ 2 replacement O-ring also suggest the! O-Rings help to create a seal without requiring deformation of the engine to cool refill! Boiling at extreme temperatures coolant to boil out [ ] ).push {... It gets answered ( system ), Dec 12, 2019 lines will leak. Dec 12, radiator leaking around oil cooler line filter as well the end next to the to... Top tank a tire rotation and was told that my transmission cooler line GO to radiator 2002 Silverado... Last year get into your cooling system im 99 % sure its an engine and swap... To wear, and when you do shift, and diagnosis it is difficult to spot the,... Of weeping at the initial stage > the fitting and line claiming the the line had a pinhole it... And causing a mess around the skid plate when i went to change the oil cooler will. `` cooled '' oil back into the cooling system cause coolant leaks above! A mechanic replaced > the fitting oil fill cap is clean vaporize as easily, leading poor!
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