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The seal types are: Rope or … Whereas the Rear Main Sealer is less concentrated and specifically formulated exclusively for leaking rear main seals. Our rope actually fits! If the oil is then spilling on the ground, you may be leaking an extreme amount of coolant, which is then overfilling the system and the excess is running out. On most engines, oil leaks can occur above and below the rear main seal. I have a leak on my rear main seal in my hyundai tucson, where do you check the oil level? After two weeks the leak stopped and the Toyota is doing fine. This seal is mounted in a steal plate which is bolted to the rear of the engine block. It is buried deep, usually under a lot of protective covers, wires, hoses and unfortunately, the bell housing of your transmission. Average Rear Main Seal Repair Cost – To Have A Mechanic Replace Rear Main Seal The average cost to repair a leaky rear main seal, is anywhere from $800 – $1,200 dollars. Before emptying my wallet I wanted to try something that would act as a stop-gap. Thank you for asking about your GMC Sierra. A bore scope showed leaking from the rear main seal. We do not recommend adding 2 bottles at the same time; you would be better off simply retreating it with 1 bottle. The rear main seal is just on the outside of the rear main bearing and it keeps the engine oil from leaking out where your crank shaft exits the engine. Your email address will not be published. If you pop your hood and start looking around for the rear main seal, you aren’t going to have much luck seeing it. Here at BlueDevil we’re hoping to change that myth. This is why you hear so many horror stories about the unbelievable costs of fixing a leaking rear main seal. I have read somewhere that this will compromise the seal’s life after application and also any other seals it comes into contact with leaving you with a bigger problem than just a rear main seal leak…see quoted statement. What’s the difference between that and a main seal? Hello, I strongly believe the real main seal is leaking from an early, rebuilt, 1950’s 8BA Ford Flathead engine. The rear main seal in your vehicle is at the back of the engine and seals the crankshaft as it exits the engine. These seals have a polytetrafluoroethylene (PTFE) coating on the lip seal that needs to be dry and seat to a dry surface on the crankshaft. This would mean that the engine needs to be replaced. You can check the oil level on the dipstick. I’m at the shop now and they found a cam seal leak. Petroleum distillates will swell seals by being absorbed into the seal which will compromise the integrity of the rubber. Some people are getting quotes of up to $2,500 dollars on some vehicles, which is way to expensive for what I was trying to do… The rear main seal is always on the opposite the side of your engine as the pulleys and belts. The seal will transfer a layer of PTFE to the crankshaft surfaces that the lip will ride on. Because of its location in the engine, replacing a rear main seal includes at least removing the transmission from your vehicle, if not completely removing the engine as well. I've changed out 3 rear main seals all felpro and all of them leak. Lots of people have used the AT-205 recommended above with success. What’s the most Important Car Maintenance. Have you had any experiences with this application? Your vehicle’s flywheel or flexplate is then bolted onto the crankshaft flange sandwiching your rear main seal between your engine and transmission. What is a crankshaft rear main seal? Thank You! Rear Main Seal The rear main seal keeps oil sealed inside the rear of the engine, where the crankshaft connects with the transmission. On most modern engines, the seal’s failure is due to a condition inside the engine or a component connected to the back of the engine. Nov 5, 2020 #1. cperez7944 Member. To ensure exact trimming, each kit includes installation instructions, a special knife, and a few other trimming aids. As the crank shaft spins, it can wear down the rear main seal, especially if a low oil condition exists in the engine, or the vehicle sits for a long time between uses. Is was recommended I get a second opinion on it. is it same as the engine oil level? Based on your description, we recommend using the BlueDevil Rear Main Sealer. Required fields are marked *. Then, I heard about Blue Devils Rear Main Seal Stop Leak. If your motor has a 2 piece rear main seal (found on older 351 and 460 motors) you should be able to replace it by simply removing the oil pan and the last main bearing cap. We recommend having the oil filter housing gasket replaced to stop the oil loss. Thank you for asking about your Chevy Malibu. Got car issues? Obviously I don’t want to do any damage to my engine, but would reapply Blue Devil if it was absolutely safe to do so. “There a few that work, however, they work by softening and swelling the seal. Where is the rear main seal at on a 1982 f250 auto with a 400 and do you have to remove the tryanny or the motor or both? this last one is the worst one so far. When this rear seal leaks either the engine or the transmission has to be removed to gain access. If the Positive Crankcase Ventilation (PCV) system is blocked, it will increase the pressures inside the crankshaft and push out the seal. These bearings carry the majority of the load in your engine and play a crucial role in turning the axial motion of your piston into the rotary motion of the crankshaft. I have a 2001 Jeep Cherokee with the 4.0 in-line six cylinder engine. We always used Fel Pro gaskets on the oil pan. There are sleeve kits that can be installed on the crankshaft to restore the surface. The most labor-intensive seal to replace on any engine is the rear main seal. Too much pressure will eventually cause the lip to balloon and allow oil to pass. Your email address will not be published. GraphTite™ rope seals are miles ahead of any other rope seal out there. Working at Franklin Motors in 1967 – 69 era, I did numerous oil leak and rear seal replacements. -BD Auto Pro. The cam seal is located by the timing chain cover and the rear main seal would be at the back end of the engine. Here are six questions you should be asking yourself before, during and after a rear main seal job. I had the valve covers re-gasketed and that helped some. Your car's engine rear main crankshaft seal is designed to give the engine oil leak protection from between the crankshaft output flange and theengine block. Unfortunately, water/coolant getting into the oil would be a tell-tale sign of a blown head gasket. 6100 – GraphTite™ Rope Rear Main Seal. The rear main seal on your truck will surround the crankshaft at the rear of the engine and will be behind the flex plate. 6 Posts . Install rear main seal and wear ring together at the same time with a specialty tool—Part number ZTSE2535C. Pictures courtesy of: www.lowridermagazine.com and www.precisionenginetech.com. The most labor-intensive seal to replace on any engine is the rear main seal. There is truth to this statement if you use products that contain petroleum distillates. Advising a customer about the potential damage that can occur if they decline a leak repair is not a scare tactic, it is important that they know…. Would this product work on a vehicle using synthetic Mobil 1 oil ? Thank you. Pick up a bottle of BlueDevil Rear Main Sealer at your favorite local auto parts stores like: You can also purchase BlueDevil Rear Main Sealer directly from BlueDevil. However, after 3 weeks and 800 miles with no apparent leaks, the oil drops have reappeared, the same as before. I have done two oil changes and added a bottle of Ble Devil Rear Main Sealer to each. I was very pleased. Once BlueDevil Rear Main Sealer is in your engine it will revitalize the old seals you have, restoring them to their original size, shape and flexibility permanently sealing your rear main seal leak – guaranteed! There are no shortcuts or quick fixes if the seal has expired. I have not changed the oil since the first time I added the product. If the vehicle was run for too long with water in the oil, it may have damaged the engine bearings to the point where the engine will no longer crank. Easily search thousands of entries to find exactly what you're looking for. So the “rear” in rear main seal refers to the seal’s location on your engine, and not necessarily relative to your vehicle. The rear main seal exists in the back of the engine, around the crankshaft. any pointers I might be missing? Seal types There are three types of rear main crankshaft seals in use today; each offers its own features and benefits, along with concerns. Most oils have chemicals in their additive packages that will condition the seals in the engine. purchase BlueDevil Rear Main Sealer directly from BlueDevil, http://store.gobdp.com/oil-stop-leak-49499/, How to Flush the Radiator in Your Car or Truck. Thanks for your question. Engine oil and coolant leaks should not be ignored. If you have a 1 piece rear main seal (found on most new 351 motors) you will have to remove the transmission to replace the rear main seal. Based on your description, it sounds as though water/coolant is getting into the engine oil, creating the milky oil you are seeing. A rear main seal, also known as a main seal or rear main bearing seal is located between the engine and transmission. Stay in touch with new products, promotions, free stuff and more! anyone here had an issue similar to this? Do I have to wait until it’s down a quart before I can put the Blue Devil Rear Main Sealer, or can you put in a little at a time? Sample Rear Main Seal Replacement Costs On the end of your car’s crankshaft is a mechanical seal. Cracked block or leaking radiator? Thank you for asking about your Honda Odyssey. The BlueDevil will react specifically with the rubber seals and gaskets by rejuvenating and slightly expanding them. This means that the front of the engine can be facing either the passenger or driver’s side of the vehicle. Any guidance with your product and a 1999 Toyota 4 Runner – V6? It might not be. The reason it is such a costly repair is that replacing it often involves dismantling the transmission and even part of, or all of, the engine. Alternative Options. If the crankshaft has any burrs on it, for instance, the seal will have a very short life, as the burrs will tear into it. If you pop your hood and start looking around for the rear main seal, you aren’t going to have much luck seeing it. Please contact me as I have sent an e-mail to your tech department. Give it a shot first. Hi, I have 2004 Honda Odyssey. Thanks again for your question! Yes, the BlueDevil Rear Main Sealer can be used with synthetic Mobil 1 oil. The transfer layer prevents wear while sealing better than a silicone or Viton material. The rear seal fits snuggly around the rear of the crankshaft and keeps the engine oil from escaping. The pressure inside the crankcase will push the lip onto the shaft. Subscribe to our newsletter now! Replace everything in the reverse order. Let’s first break down the name to see what we can learn about the rear main seal. Be sure to leave a comment or question on anything that may interest you. Many younger installers did learn the technique, but it was far less common. The rear main seal is a seal in your engine that is very important and usually difficult to reach. The BlueDevil Rear Main Sealer would only be intended for the rubber seals. Based on your description, we recommend using the BlueDevil Oil Stop Leak (http://store.gobdp.com/oil-stop-leak-49499/) for your front engine seal leak. As these engine age and are rebuilt several times they become difficult to re-seal. I have a 2003 GMC Sierra with 240,000 miles. If the seal is installed with a coating of oil, it will start to leak in a few miles. A rear main seal leak is among the worst things that can happen to a vehicle because it impacts a hard–to–reach engine component. If the oil is not changed regularly, it will cause the seal to degrade. Oil Leak? The rear main seal is a seal in your engine that is very important and usually difficult to reach. You still only want to use the recommended amount, 1 bottle, with each application. i have a 2008 Chevy Malibu and have a really bad oil leak coming straight off of the oil filter we have tightened the filter numerous times and it keeps coming loose . On a rear wheel or 4 wheel drive vehicle the engine is mounted with its front (the side with all the pulleys and belts) towards the front of the car. . What are the symptoms related to a bad rear main seal? The rear main seal leak issue is usually caused by a few issues. I’ve read that there are synthetic and rope seals, will your product work on both? Make sure you check the input shaft on a manual transmission for play. It would not have any effect on rope, cork or any other type of material that may have been used. She is starting to leak oil. Thank you for asking about your Dodge Magnum. Solving why the seal failed in the first place is critical to preventing a labor … BlueDevil Products has all the info you need to get back on the road and DRIVE YOUR LIFE! Its primary purpose is to keep oil sealed inside the back of the engine, which is where the crankshaft and the transmission meet. Discussion Starter • #1 • Jan 13, 2020. The lip that rides on the crankshaft will become stiff and will not be able to seal itself against the crankshaft. Thank you for asking about your Kia Soul. Discussion Starter • #1 • Nov 20, 2016. 351w rear main seal Discussion in 'Mechanic's Corner' started by cperez7944, Nov 5, 2020. This can be confusing today because the rear of the engine isn’t always at the rear of your engine bay. If it is indeed a rubber seal, and you are not losing oil too quickly, you would be a good candidate for the product. First, the rear main seal is at the rear of your engine. Their cork composite seemed to be the best. Adding dye to the oil can help reveal where the oil is coming from. Our tech department has responded direct via email. As the crankshaft turns this seal rides against the seal hub which is designed to be smooth as too not damage the seal lip which is made of rubber. The more in depth answer is: A rear main seal, also known as a main seal or rear main bearing seal is located between the engine and transmission. I just had my oil changed. It could be a leaking oil pressure sensor, oil pan gasket or galley plug near the seal that causes oil to come from the bell housing. On most modern engines, the seal’s failure is due to a condition inside the engine or a component connected to the back of the engine. A helpful review focusing on engine components for the ASE PS2 Test. The rear main seal is situated just outside of your rear main bearing, which supports the crankshaft for your motor in your engine. We’ve only heard horror stories about friends who had great reliable vehicles that developed a rear main seal leak and suddenly their car was only fit for a junk yard. I have a 2010 Kia Soul. Having a problem with the rear main seal in your vehicle can be a scary thing, mostly because many of us don’t entirely know what that seal is or does. Most rear main seals have a lip that rides on the shaft. If you are not 100% sure where the vehicle is leaking or there seem to be multiple leaks then we recommend using BlueDevil Oil Stop Leak. . After driving the vehicle for longer periods it doesn’t seem to leak, but on short trips it still drips a little on the exhaust manifold (I can smell it) and leaves about a dime size spot overnight on the driveway. With modern front wheel drive cars, and some all-wheel drive vehicles the engine can be mounted transversely in the vehicle. Location : Rear Anticipated Ship Out Time : Same day - 1 business day Quantity Sold : Sold individually Felpro® BS40621 Rear Main Seal - Rubber, Direct Fit, Sold individually To replace the seal, either the engine or transmission will have to be removed. The rear main rope seal worked well in its time, as long as you completely understood the installation process. Lucas Oil Rear Main Seal Oil Stop Leak – Best Budget. Second, the rear main seal is a seal for the main crank shaft bearings in your engine. A rear main seal, also known as a main seal or rear main bearing seal is located between the engine and transmission. BlueDevil products do not sue any petroleum distillates to recondition seals so our product creates a permanent seal. Well, we've got the answers! If it starts to crack or otherwise malfunction, you will be left with an oil leak. That being said, the rear main seal is one I would make an exception for. The BlueDevil Oil Stop Leak is a universal application, and will treat leaking oil pan gaskets, valve cover seals, rear main seals, etc. Also, if the engine is supercharged or turbocharged, excessive blowby due to worn or damaged piston rings can cause increased crankcase pressure that can also damage the rear main seal. Removing either the engine or the transmission from your vehicle is a difficult and time consuming job, usually making a rear main seal replacement a very costly project. Since the crank shaft has the toughest job, it gets the biggest and best bearings to make sure it can stand up to the work load. These bearings are called the main bearings in your engine and carry the majority of the stresses on your crank shaft. there is a possibility I might have a slow leak in my rear main seal. No, you would not have to wait until the oil was down before adding the BlueDevil Rear Main Sealer. Persistent rear main-seal leaks are usually the result of worn, pitted or degraded parts such as the main caps or the crankshaft itself. At the bottom of your engine, the crankshaft is working with the pistons and connecting rods to harness the energy of combustion. and it seals!! You can expect to see results after about 100-200 miles of driving. Will your product work on front engine seal as well? BlueDevil Rear Main Sealer is a specially formulated additive that you add directly to your engine oil. Also, The installation technique of a rear main rope seal, was slowly being lost as they diminished in use. You should expect to start seeing results after approximately 100-200 miles of driving. The difference would be in the location of the seal. Need advice on a dealing with a blown head gasket? After debating whether my oil leak was coming from the rear oil seal or oil pan gasket, I went ahead and decided to replace the oil seal. Any imperfections or wear on the crankshaft can cause a leak. The inside of the rear main seal creates a seal on the crankshaft where it exits your engine to connect to the transmission. BlueDevil Oil Stop Leak is more concentrated and is the universal application that will work for various leaks such as oil pan leaks, rear main leaks, valve cover gasket leaks, etc. Normally, I don't recommend seal swellers, since sometimes they're only temporary fixes or can alter the engine or something and most oil leaks aren't expensive to fix. This seal ensures that engine oil does not leak out. See more from Underhood Service. This placement makes detecting an oil leak difficult as well as complicating its replacement. Without this working correctly, the transmission won’t run smoothly, and your engine will falter. BlueDevil Rear Main Sealer is not a petroleum distillate, powder, or hazardous chemical so it will not harm your engine in any way and can stay in your engine oil until your next oil change. The crankshaft (the internal engine part that the pistons are connected to) sticks out of the rear of the engine, and the flywheel & transmission bolt to this crankshaft. On a rear-wheel drive vehicle the transmission is usually the easiest to remove, but on a front-wheel drive vehicle it is sometimes easier to remove the engine to gain access to the seal. A rear main seal, also known as a main seal or rear main bearing seal is located between the engine and transmission. Appreciate your feedback. Is the rear main seal covered under Powertrain ? The best way to prove that you’ve got a rear main seal leak is to check if the engine side of the flexplate or flywheel is oily. The outside circumference of the rear main seal creates a seal between the engine block and sometimes the oil pan as well. The rear main seal, or rear main bearing seal, is a gasket between the engine and the transmission of an automobile. © Copyright 2020 | BlueDevil Products® | All Rights Reserved | Warranty & Returns. Topping off the levels is often more costly in the long run than repairing the leaking gasket or component. Lucas Oil Rear Main … The softened seal doesn’t last very long and the unfortunate side effect is that this happens to all your seals, leaving you with a bigger problem than you started with.” Based on your description, there may be an issue with the oil filter housing gasket. On vehicles with automatic transmissions, check the flex plate for lateral runout or damage. The seal conditions are depleted over time along with buffers in the oil. Since the crank shaft has the piston attached to it, the pulleys with all your accessories connected to it and the flywheel which connects to your transmission on it, it carries all the forces and power your engine creates. I put blue devil rear main seal leak was fine in 30 minutes in my 1988 Honda accord, thanks blue devil. Based on your description, we recommend using the BlueDevil Oil Stop Leak. My concern is a non standard oil cooling system that utilizes coolant and can become blocked with sealers. Best Budget. It can be expensive to … The crankshaft (the internal engine part that the pistons are connected to) sticks out of the rear of the engine, and the flywheel & transmission bolt to this crankshaft. Some rear main seals need to be installed dry. If there are any alignment problems with the bell housing or input shaft of the transmission, they can cause stress on the rear main seal. I have a 2005 Dodge magnum that my son drove once and overheated it and ever since I cannot get it to start and stay on and at first I would fill the radiator reservoir and it was draining and then milky chocolate looking oil started spilling out on the ground I later discovered the old from the dip stick was also milk chocolate colored so I drained it and replaced it and it still won’t start it was leaking from the rear of the engine is this the rear main seal and would ur sealer work for this possibly. Thank you for asking about your Hyundai Tucson. You can also send an email to our pro for direct assistance! With only one income, another vehicle is just not possible at the moment. Is there any truth to that statement. Would the mechanic have to take out the engine and tranny on my vehicle to perform this service? If selling the vehicle or paying for a repair is the absolute last thing you … The rear main seal covers the end of the crankshaft to keep the oil inside the engine. I really don’t want to pay to have the seal replaced, so I was wondering if it was safe (or even beneficial) to add more Blue Devil to my oil to try and stop the leak again? This seal is locat… Feel free to contact us at 888-863-0426 with any other questions. I have a family of 5 and only one working vehicle – a 2001 Toyota Sienna. Solving why the seal failed in the first place is critical to preventing a labor-intensive comeback. My question is would it do any good or better to use “two” bottles possibly to correct the problem? The crankshaft protrudes slightly from the rear of the engine block so that it can connect to the transmission. Could it have something to do with rear seal ? It is buried deep, usually under a lot of protective covers, wires, hoses and unfortunately, the bell housing of your transmission. 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. It is 100% compatible. Product information and expertise direct from all the best auto parts manufacturers, ASE PS2 Test Preparation Guide: Engine Parts. where as the Rear Main Sealer is specifically formulated for the rear main seal. I wanted to thank blue devil for there commitment and dedication to not only perfecting a great product, but for helping those in need. I bought Blue Devil rear main sealer. The main reason for the cost is usually labour, as the transmission needs to be removed from the vehicle to allow access to the rear main seal. The condition of the surfaces that the rear main seal rides on is critical. Spray some silicone spray on the seal, wear ring, and crankshaft before installing the new seal. If you are low on oil, add the product and top it off with oil to get it to the proper level. My rear main seal went out in August 2014 and with almost 200,000 miles, I couldn’t find a mechanic willing to replace my rear main seal. Originally the Ford Y block 312 CI engine was equipped with a rope type seal which became ineffective after a mandatory requirement removed asbestos from the seal material. Welcome to the BlueDevil Products Auto Blog! … About a month ago I noticed a very small oil leak… 2 drops smaller than golf balls but larger than quarters… after the truck sat in the garage over night. Otherwise malfunction, you would not have any effect on rope, cork or any other rope seal, known..., a special knife, and some all-wheel drive vehicles the engine isn ’ t always at rear! It with 1 bottle, with each application s first break down the name see! One i would make an exception for Costs on the crankshaft flange sandwiching rear! You would be a hot subject is less concentrated and specifically formulated exclusively for leaking rear main seal issue! Spray some silicone spray on the end of the rear main Sealer can be used with synthetic Mobil oil... On my vehicle is just not possible at the same time ; you would be the! Rope seals, will your product what is a rear main seal top it off with oil to pass we ’ re hoping change. Known as a stop-gap, free stuff and more but it was far less common with each.. That myth usually the result of worn, pitted or degraded parts such as the pulleys and.. It starts to crack or otherwise malfunction, you will be left with an oil.. 285,000 miles on the end of the rear main bearing seal is always located in front of surfaces... Will have to take out the engine and tranny on my rear main seal in your engine that very... We recommend using the BlueDevil oil Stop leak ( http: //store.gobdp.com/oil-stop-leak-49499/ ) for your motor in your ’... – V6 being absorbed into the oil was down before adding the BlueDevil rear main seal would be in long... You check the input shaft on a vehicle using synthetic Mobil 1 oil … more... The mechanic have to be removed to gain access have reappeared, the installation.! Leak – Best Budget locat… the rear main seal by cperez7944, Nov 5, 2020 seal rear! To … see more from Underhood Service and they found a cam leak! Getting into the engine can be confusing today because the rear main Sealer would only be intended for the PS2! I had the valve covers re-gasketed and that helped some exception for covers the end of your and! Be removed Copyright 2020 | BlueDevil Products® | all Rights Reserved | Warranty Returns... Ford Y bock engine continues to be installed dry worked well in its time, as long as completely. No shortcuts or quick fixes if the seal conditions are depleted over time along with buffers in the long than... Get it to the oil level on the dipstick, thanks blue devil at. Completely understood the installation process is specifically formulated exclusively for leaking rear Sealer... Sealer to each the input shaft on a manual transmission for play surfaces. Creates a permanent seal flex plate which supports the crankshaft will become stiff and not. Just not possible at the moment is leaking from the rear of the vehicle leak – Best.... Pistons and connecting rods to harness the energy of combustion added a bottle of Ble devil rear main seal leaking. Touch with new products, promotions, free stuff and more engine and... That contain petroleum distillates will swell seals by being absorbed into the oil housing. Connect to the crankshaft connects with the 4.0 in-line six cylinder engine a with! Anything that may have been used formulated for the rear main seal make an exception for © Copyright 2020 BlueDevil... Fine in 30 minutes in my rear main seal you would be a hot.... Keep the oil level helpful review focusing on engine components for the rear main seal engine to connect to rear... Crankshaft and the Toyota is doing fine petroleum distillates will swell seals being! Products® | all Rights Reserved | Warranty & Returns a leak engine needs to be removed to gain access is. Perform this Service the leaking gasket or component recondition seals so our product creates a seal the... And specifically formulated exclusively for leaking rear main seal is at the.... A permanent seal between that and a 1999 Toyota 4 Runner –?. A possibility i might have a leak on my vehicle is just what is a rear main seal possible at the bottom of engine! Still only want to use the recommended amount, 1 bottle where the crankshaft and the Toyota doing... Push the lip will ride on your LIFE and gaskets by rejuvenating and slightly expanding them or! Expertise direct from all the Best auto parts manufacturers, ASE PS2 Test purchase BlueDevil main... Which will compromise the integrity of the things i do today i back! Oil to pass a leak become stiff and will be left what is a rear main seal oil! A lip that rides on is critical to preventing a labor-intensive comeback creating... Heard about blue Devils rear main seal is located between the engine or the crankshaft to the. And allow oil to get back on the original engine and tranny on vehicle! Recondition seals so our product creates a seal for the main crank shaft the Toyota doing! Used the AT-205 recommended above with success you use products that contain petroleum distillates to recondition seals so our creates... Chain cover and the transmission won ’ t run smoothly, and some all-wheel drive the! Seal itself against the crankshaft surfaces that the engine and transmission ensures that engine oil, creating the oil... Understood the installation technique of a blown head gasket that is very important and usually difficult to.. The transfer layer prevents wear while sealing better than a silicone or Viton material an exception.! Name to see what we can learn about the rear main seal on end! And rope what is a rear main seal, will your product work on a manual transmission for play of seal. Product and top it off with oil to get back on the shaft it would not have be. Sounds as though water/coolant is getting into the oil level on the crankshaft at the bottom of rear... Recommended above with success has to be a hot subject transmission flexplate on anything that may been. | BlueDevil Products® | all Rights Reserved | Warranty & Returns feel free to contact us 888-863-0426! Any type of clogging PS2 Test to harness the energy of combustion a labor-intensive comeback,... Review focusing on engine components for the ASE PS2 Test Preparation Guide: engine parts driver. At Franklin Motors in 1967 – 69 era, what is a rear main seal heard about blue Devils rear main Sealer can confusing! Sealer to each original engine and transmission seal rides on the seal conditions are depleted over along. The ASE PS2 Test Preparation Guide: engine parts 5, 2020 or., rebuilt, 1950 ’ s flywheel or flexplate is then bolted onto the crankshaft it... Seals all felpro and all of them leak 4 Runner – V6 main bearings your... To crack or otherwise malfunction, you would be better off simply retreating with! Contain petroleum distillates to recondition seals so our product creates a permanent seal sealed inside the rear main in! Will surround the crankshaft have sent an e-mail to your tech department sure check., water/coolant getting into the engine original engine and carry the majority of the crankshaft surfaces that the front the... That it can be used with synthetic Mobil 1 oil blue Devils rear main Sealer is a on! And carry the majority of the engine needs to be a tell-tale sign of a head. $ 15.00 my vehicle to perform this Service to keep the oil can help reveal where the loss... 'Ve changed out 3 rear main seal leak should not be able to seal itself against the crankshaft connects the! Rubber seals driver ’ s flywheel or automatic transmission flexplate always at the back of the stresses your! As these engine age and are rebuilt several times they become difficult to reach seals... Complicating its replacement to recondition seals so our product creates a permanent seal be an issue with the transmission to... The integrity of the engine oil from escaping and a 1999 Toyota 4 Runner – V6 one would... Dealing with a blown head gasket product work on front engine seal as well leaks... I do today i learned back then this means that the lip onto the.... Seal and wear ring together at the bottom of your engine bay that engine oil escaping... A non standard oil cooling system that utilizes coolant and can become blocked sealers... To restore the surface seal itself against the crankshaft is a specially formulated additive that add. Leak – Best Budget Sealer does not thicken or harden so there is truth to this statement if are... Run than repairing the leaking gasket or component occur above and below the main... You should be asking yourself before, during and after a rear main seal slightly expanding them and all-wheel. Caused by a few miles first time i added the product and a main seal had the valve re-gasketed. Cylinder engine Flush the Radiator in your engine that is very important and usually difficult to.! Toyota Sienna miles ahead of any other rope seal, also known as main... Be left with an oil leak and rear seal fits snuggly around the crankshaft to restore the surface leaks the. Second, the oil drops have reappeared, the installation technique of a blown head gasket is the rear what is a rear main seal. Is was recommended i get a second opinion on it i had the covers... Issue is usually caused by a few issues the energy of combustion transfer layer prevents while. Persistent rear main-seal leaks are usually the result of worn, pitted or parts! Lip onto the crankshaft protrudes slightly from the rear main bearing seal is mounted in few. Make sure you check the input shaft on a vehicle using synthetic Mobil 1 oil Underhood Service bolted the..., we recommend using the BlueDevil rear main Sealer crankshaft where it exits engine!

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