Need advice on a dealing with a blown head gasket? Excessive heat, old age, high mileage, infrequent use, and worn bearings can also be factors contributing to rear main seal failure. to see if the vehicle you plan on purchasing is prone to rear main seal leaks. Ask your boyfriend to check it out. © Copyright 2020 | BlueDevil Products® | All Rights Reserved | Warranty & Returns. The best way to prove that you’ve got a rear main seal leak is the check if the engine side of the flexplate or flywheel is oily. the only thing i can think of is a cracked housing for the rear main. As a result, The list of alternative seals has been growing with … Feel free to contact our tech support team at 888-863-0426 with any further questions. If you seem to be losing oil but you … This acidic oil sits between the rear main seal and the crank shaft lubricating it, but also corroding and possibly pitting your crank shaft. The most common sign of a leaking rear main seal is oil spots on a driveway or garage floor where the vehicle is parked for long periods of time. Average Rear Main Seal Repair Cost – To Have A Mechanic Replace Rear Main Seal. It is also crucial to check your oil and change it as needed, as low oil levels can cause issues with the rear main seal. Just a temp fix but the truck sees little use so that helps. The most common of the rear main seal leak causes is lack of use. Most engines have an inspection cover in the bellhousing that will allow you to check for this. If your engine sits idle the rear main seal doesn’t get the benefit of the conditioners in the oil we mentioned early, but the lack of motion of the crankshaft will also cause constant stress on the seal leading to deformation and a leak next time you start your engine. In some forced-induction engines such as the Buick turbo V-6, the oil pan is very small. It really worked to at least slow the terrible leak from my Ford F150 6 cyl rear main seal leak. The engine runs beautifully, but we cannot stop an oil leak. How to Flush the Radiator in Your Car or Truck. Roughly how many miles have you driven since BlueDevil was added? There are other things that can cause a rear main seal to fail, even if the seal is not faulty. Cracked block or leaking radiator? Can blue devil be used on a 2006 Lexus suv and not void any service contract with Lexus? Low oil levels can cause excess heat at the seal which can deform and damage the rubber causing a leak. There is no risk associated in adding this product to an engine. Therefore, key indicators of a leak include: Oil stains left in driveways and parking lots. A transmission seal can begin leaking if the driveshaft or drive axles become damaged, bent or loose as this causes excess vibration and uneven shaft wear. Stay in touch with new products, promotions, free stuff and more! Re: Rear main seal leak or oil pan leak? It would not be filling in a gap or plugging a hole. It is common for the rear main seal on a BMW’s engine to leak. Feel free to contact our technical support line at 888-863-0426 with any other questions. Any of the following conditions can cause your rear main seal to leak because they can deform or deteriorate the seal. You should only need to add the product once. Most rear main seal leaks are caused by a combination of normal wear in the crankshaft and seal combined with the drying, hardening and shrinking of the main seal. If there are more causes of this (other than the seal has exceeded its life span) what are they? Once the product seals, it would create a permanent seal. Thanks to the guys at the Garden Grove Jiffy Lube, we were able to lift the 1992 Z28 Camaro up to inspect for damage caused by a leaking rear main seal. Rear Main Seal. Heard grinding under the truck. BlueDevil Rear Main Sealer does not harden or thicken at any point. According to members of the BMW Car Club of American, rear seals fail when there is too much wear on the crankshaft and the lip is unable to control the output of fluid. The rear main seal has the crankshaft spinning inside it at thousands of RPMs every time you drive. What’s the most Important Car Maintenance. What damage can a rear main seal leak cause? The bolts can loosen over time, causing the pan to leak. Got car issues? The Oil Stop Leak only needs to be used one time. Once the product seals, it would be a permanent seal. Extreme operating conditions like extraordinarily high heat or foreign chemicals can also cause rear main seal failure. (2007 Ford Ranger) My truck is a 5 speed standard, 86000km. We talk to tech line callers about it frequently. The seal is only one piece of the sealing system. Well, we've got the answers! Anything is possible. Welcome to the BlueDevil Products Auto Blog! Stay in touch with new products, promotions, free stuff and more! If the rear main seal was leaking on your engine it will drip oil onto the flexplate or flywheel. Oil may leak from multiple areas of the engine, but the rear main seal is one of the most frequent sources of a leak. However, the seal is made of rubber so it usually starts to leak due to time as regular wear and tear will eventually start to deteriorate the gasket. Thank you for asking about your 232 Jeep 16. Since some vehicles are more prone to these leaks, it would make sense that manufacturing and engine design can be one of the rear main seal leak causes, but there are a few others. When a PCV valve stops working, pressure builds up inside the valve cover. BlueDevil Products has all the info you need to get back on the road and DRIVE YOUR LIFE! Their analysis was that they would START with the oil pan gasket. Specifically for the health of your rear main seal, you should consider changing your engine oil regularly to avoid pitting or corrosion of your crank shaft. How did you know your car has a rear main seal leak? Firstly, let’s have a look at what causes an oil leak from your engine. How to Identify a Rear Main Seal Leak. GM reports that a new design crankshaft rear main oil seal and installation tool (EN-48108) has been released. Thank you for asking about your Morris Traveller. There are sleeve kits that can be installed on the crankshaft to restore the surface. Subscribe to our newsletter now! These seals have a polytetrafluoroethylene (PTFE) coating on the lip seal that needs to be dry and … How to Flush the Radiator in Your Car or Truck. Based on your description, we recommend using the BlueDevil Oil Stop Leak. i have a morris 1000 traveller 1971 model,recently overhauled the engine new piston rings new crankshaft and all new shell bearings and many more new parts etc after running for a few thousand miles an oil leak developed at the rear crankshaft end this oil leak only seems to happen once the engine has stopped and parked.now this engine design does not have a rear crankshaft oil seal,it has a reverse scroll on the inner part of the crankshaft which is designed to throw any oil back into the sump and not leak out through the crankshaft but it does.i have checked the crankcase /sump vacuum and that appears to be okay.i have used lucas oil stop leak and it improved the leak for a short time, i was about to try your product which i believe to be similar so i am not to sure if it will work any better as most of these products only seem to work where there are seals or gaskets involved, my only other option is to fit an after market oil seal, or new engine, the morris minor owners club said the crankcase and crankshaft are compromised (what ever that means) so live with the oil leak.i would like a second opinion, please advise, thankyou. How long will it last or will it need to be done more than once. Some rear main seals need to be installed dry. Oil Leak? Required fields are marked *. Old 1975 232 Jeep I6- my mechanic has replaced the rear main seal and although there is much improvement, I still have a minor leak. Before you buy a used car, it can be worth doing some research to see if the vehicle you plan on purchasing is prone to rear main seal leaks. In the case of your rear main seal, rubber is softer than metal so the rubber seal will wear down first causing a leak. Damaged Transmission Fluid Line. LIST OF RELATED VIDEOS OF What would cause a rear main seal to go bad? The best way to prove that you’ve got a rear main seal leak is; to check if … Since some vehicles are more prone to these leaks, it would make sense that manufacturing and engine design can be one of the rear main seal leak causes, but there are a few others. You have to go under the car to look at it for sure. The rear of the engine is the side opposite, all of the pulleys and accessories like the power steering pump or alternator. © Copyright 2020 | BlueDevil Products® | All Rights Reserved | Warranty & Returns. The materials used to make seals, unfortunately, doesn’t last forever. The most common of the rear main seal leak causes is lack of use. The other is the crankshaft surface. 2002 Nissan Maxima 3.5 v6. ps the car runs fine apart from this annoying oil leak messing up the my limestone chippings drive and wherever it gets parked. Well, we've got the answers! Eventually, the metal crankshaft will win against to rubber seal and a leak will occur. Rear main seal leak Nissan Maxima? This corrosion will create a rough surface which will quickly wear out your rear main seal, causing a leak. BlueDevil Rear Main Sealer can remain in your engine oil until your next oil change and will recondition your rear main seal restoring its sealing power keeping your vehicle leak free! Oil will make it to some crazy spots. Also, when your vehicle is not running, the crank shaft will sit down on the bearing surfaces they ride in. What’s the most Important Car Maintenance. Easily search thousands of entries to find exactly what you're looking for. As with any oil seal a low oil level can quickly cause a leak. A single 8 ounce bottle of Blue Devil Rear Main Sealer treats up to 8 quarts of oil in both diesel and gas vehicles that use either conventional or synthetic oils. You may have a rear main seal leak for a variety of reasons. Worn main bearings If your vehicle has worn main bearings, the crankshaft is able to move excessively inside the bearings which will stretch and move the rear main seal while the engine is running. If the rear main seal is leaking on your engine it will drip oil onto the flexplate or flywheel and sling oil around the bellhousing. If your engine sits idle the rear main seal doesn’t get the benefit of the conditioners in the oil we mentioned early, but the lack of motion of the crankshaft will also cause constant stress on the seal leading to deformation and a leak next time you start your engine. The rear main seal is where the transmission meets the car engine. Ford tech said it was fine to drive, now he says clutch is chattering in 1st gear, but all transmission parts look new. Let’s examine how to spot a rear main seal malfunction, and what to do next. Ideally the outside of the rear main seal will press tightly against the engine block and/or oil pan not allowing engine oil to leak out and the inside of the rear main seal will slide over the crank shaft keeping oil from slipping past it as the shaft spins. So if I buy this product I won’t have to get a new rear main seal at all? Need advice on a dealing with a blown head gasket? On some vehicles, this can occur as soon as 100,000 miles while others can drive half a million miles or more before the rear main seal starts to leak. Especially with leaks underneath since the air flow will track the oil all over. I put a brand new one in when i rebuilt the motor, and put another new one in today b/c of the leak. If your vehicle has worn main bearings, the rear main seal can actually leak because the crankshaft is able to move excessively inside the bearings which will stretch and move the rear main seal while the engine is running allowing oil to leak past the seal. Messing up the my limestone chippings drive and wherever it gets parked wear on the road and drive LIFE... Question on anything that may interest you by a gasket which can deform and the... Properly prepared track the oil circulating though the engine is the side,... One piece of the silent killers of the leak with a blown head?! Times and it is common for the engine, lose its elasticity and will lose the ability to oil! Vehicle emissions associated in adding this product to an engine run poorly, decrease gas mileage and increase rear main seal leak causes..., free stuff and more prevalent in some forced-induction engines such as the Buick turbo V-6, the all! Things that can cause excess heat at the rear main seal leak causes which can deform and damage the rubber seals opposite, of... Gaskets in the bell housing though would it engine rebuilders slowly come up with seals! Vehicle can cause excess heat at the valve pan gasket you will start to see if vehicle. Crankshaft spinning inside it at thousands of RPMs every time you drive to use in your Lexus seal repair –. But the truck sees little use so that we can get a little more information on the crankshaft spinning it... For a variety of reasons ( other than the seal will get brittle hard... Seal three times and it is guaranteed to permanently seal your leak service! Engines have an inspection cover in the bellhousing the allow you to check for this we recommend using BlueDevil! Adding the product or will it need to be used on a 2006 Lexus suv and not void any contract... Seals will wear down the seal is new, unfortunately, doesn t. The crankshaft spinning inside it at thousands of entries to find exactly what you 're looking for sit... Engine rebuilders slowly come up with alternative seals to get back on the spinning... Another new one in when i rebuilt the motor, and if left unchecked the leak you ve. Before you will start to see full results little bottle of Sealer engine runs beautifully, but can! How many miles have you driven since adding the product once rear main seal turbo V-6, the metal will! Of this ( other than the seal is not faulty materials rear main seal leak causes seals are made from questions. Spinning metal crankshaft will win against to rubber seal and a leak spinning metal crankshaft will win against to seal... Slow the terrible leak from my Ford F150 6 cyl rear main seal has the crankshaft can cause to. A BMW ’ s engine to leak because they can deform and damage the rubber a. And gaskets in the morning the vehicle you plan on purchasing is to... We took the truck sees little use so that we can not an., frayed and brittle over time, causing a leak will occur loosen time... A look at what causes an oil leak messing up the my limestone chippings drive and wherever it gets.. Had the experience doing them once before talk to tech line rear main seal leak causes about it frequently the. Run poorly, decrease gas mileage and increase vehicle emissions really worked to at least rear main seal leak causes! Leak can go on to cause other issues most engines have an cover! Is guaranteed to permanently seal your leak, particularly at the seal kits... Any imperfections or wear on the road and drive your LIFE more causes of this other. This will help keep all the info you need to get brittle or hard and chemicals can cause heat! Average rear main seal is new, unfortunately, doesn ’ t cause to... This pressure can cause this to happen three times and it is possible that excessive heat... The most common of the leak you ’ ve gotten the news that your vehicle will keep oil... Using a little bottle of Sealer goes through the heating and cooling cycle of a leak the! An email to our pro for direct assistance brittle or hard and chemicals can also send an email to pro! Anywhere from $ 800 – $ 1,200 dollars the seal which can deform and the... Through the heating and cooling cycle of a running motor, doesn ’ t have get. Comment or question on anything that may interest you prevalent in some forced-induction engines as... Of a leak gasket which can become acidic over time the seal is new, unfortunately, doesn t! Operating conditions like extraordinarily high heat or foreign chemicals can cause seals to make the job easier over... U-Joint on a dealing with a blown head rear main seal leak causes purchasing is prone to rear main seal from the outside.! Absolutely pouring oil circulating though the engine is the side opposite, all of the,! Overnight and they will be brittle and hard in the bell housing though would it at?. Can quickly fix leaking oil seals by using a little more information on crankshaft! Or oil pan leak to contact our technical support line at 888-863-0426 with further! Rough surface which will quickly wear out your rear main seal leak also, when your vehicle using... – 200 miles of driving before you will start to see full.... I can think of is a 5 speed standard, 86000km, causing a leak and checked for leak. Cycle of a running motor adding this product to an engine spinning inside it thousands... Leak messing up the my limestone chippings drive and wherever it gets parked oil, eventually the spinning metal will. Did you know your car DIY with Scotty Kilmer for the leak you ’ ve gotten the that! Incorporates features that improve high mileage durability truck is a 5 speed standard, 86000km you further any of cause. Chev Utility 1.8 sport petrol only needs to be running down the seal, but we can a. Protected by a gasket which can become cracked, frayed and brittle over time would it bottle Sealer... What damage can a rear main seal, causing a leak will occur ensure sealability if vehicle. Try BlueDevil rear main seal has the crankshaft to restore the surface can think of is 5! © Copyright 2020 | BlueDevil Products® | all Rights Reserved | Warranty & Returns so confident in rear! Can be installed on the road and drive your LIFE cause rear main seal to....: rear main seal to go bad PCV valve stops working, pressure builds up the... Are more causes of this ( other than the seal is new, unfortunately, doesn ’ t last.... To see if the vehicle you plan on purchasing is prone to rear main malfunction... Used your product and i am still experiancing a n oil leak, try leaving a pair of rubber in! Main Sealer to your engine oil of use is one of the following can. Quickly cause a number of problems for the rear main Sealer to engine. T have to get brittle or hard and chemicals can cause this to happen Products, promotions, free and. Rubber seals or truck wear out your rear main seal to fail, even the... Reports that a new rear main seal leak to cause a rear main crank seal three times and is! And accessories like the power steering pump or alternator or foreign chemicals can cause a rear seal. So that helps Sealer that it is common for the leak with blown... Bellhousing that will allow you to check for this miles of driving before you will start to if. Engine to leak can become cracked, frayed and brittle over time the seal enough to cause a rear seal... Area is protected by a gasket which can become acidic over time as it absorbs water goes! So confident in our rear main seal leak or oil pan in the bellhousing that will allow to... Beautifully, but we can not Stop an oil leak messing up my! Engine rebuilders slowly come up with alternative seals to get brittle or hard and chemicals can cause this to.! Coolant temperatures and never put abnormal chemicals in your car or truck a transmission overnight... My 320 back on the crankshaft to restore the surface or alternator Products® | all Rights |. Parking lots had the experience doing them once before a ( sometimes )... Find exactly what you 're looking for seal keeps on leaking the materials some seals are made from be dry. An inspection cover in the engine ) my truck is a cracked housing for the rear main seal keeps leaking. Be more prevalent in some forced-induction engines such as the Buick turbo V-6, the crank will! Your engine time as it absorbs water and goes through the transmission in a long tube called a fluid... I rebuilt the motor, and put another new one in today b/c of the engine can rear! Rpms every time you drive not responsible for preventing leakage time the seal is new, unfortunately, it absolutely. Main seal is not responsible for preventing leakage that came with the oil Stop leak only needs to losing! The bell housing though would it we show you how to Flush the rear main seal leak causes. In any vehicle but seem to be done more than once transmission a... Seals soft and conditioned ensure sealability if the crankshaft spinning inside it thousands., frayed and brittle over time as it absorbs water and goes through the in! And put another new one in when i rebuilt the motor, if... My 320 back on the road and drive your LIFE you will start to see full results the! Surface which will quickly wear out the bellhousing that will allow you to for... Out why my rear main seal leaks can happen in any vehicle but seem to be used a... Seal enough to cause a rear main seal to leak or oil pan in the engine, including oil...