how to fix rear main seal oil leak

Your email address will not be published. Did you make this project? REAR Main Bearing OIL SEAL Dimensions - CS-109. Start with the valve cover gasket because it is simple, inexpensive fix. I'd almost guarntee you that is a rear main seal leak. This turned out to be my problem after replacing the rear main 4 times. In either shop you want to ask "Is this going to fix it?" He was riding in his recently purchased 1972 Pontiac Firebird and I was following behind him in my car. Mine has been leaking, Not where it's on the ground. Cracked block or leaking radiator? This seal is the rear main seal that you need to take off. Table of contentsSpot the oil leaksFix the oil leaks as soon as possible Spot the oil leaks Go under the Bug and then start checking the car. 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. This turned out to be my problem after replacing the rear main 4 times. It was one of those washes where it got worse before it got better, but once I could see again I noticed the hazed looked a lot like dirty engine oil and there was a decent amount of smoke coming from my friend’s Pontiac. Though the seal is a fairly inexpensive part, labor costs can be expensive. Once you've determined you've got a dripping leak, you'll want to start from the bottom and work your way up. Oil may leak from multiple areas of the engine, but the rear main seal is one of the most frequent sources of a leak. You can also send an email to our pro for direct assistance! My friend just purchased a 2005 with about 50,000 miles. If you're out of options, this is a fairly low cost method that has worked for some people with a leaking rear main seal. Unfortunately, this is not the case. project image – Instructables Cheap Fix Test Instead Of Spending $1,200 Dollars On Rear Main Seal Repairs At Your Mechanic! Ouch! It turned out the rear main seal had started leaking. Rear main seal leak vs Seal valve leak If you notice your car is losing or burning oil at a somewhat faster-than-normal rate, but you don’t see oil puddles on the ground, and you’ve noticed billowing exhaust from your tailpipe each time you start the engine, the issue probably isn’t due to a rear main seal leak. So, I have done the modification to the rear main and removed a .0005 shim to tighten up the bearing a wee bit. Each time the crank arm and connecting rod moves through the oil, it splashes it onto the necessary bearings of the connecting rod, piston and cylinder walls to provide lubrication there. © Copyright 2020 | BlueDevil Products® | All Rights Reserved | Warranty & Returns. A few years back, I was on a three-hour road trip with a friend. The first step and a simple way to test if your car is really leaking oil is to idle the … Adding BlueDevil Rear Main Sealer to your engine oil will allow your rear main seal to be reconditioned as you drive your vehicle in 2 days or less. This seal is the rear main seal that you need to take off. There are a few things to tackle here: 1. 6. A few mechanics have said they think the leak is coming from the rear main seal. Required fields are marked *. 3. Consequently, If you see oil dripping on the back of your oil pan; or on the front of your transmission bell housing; it’s possible you have a rear main seal leak. The Firebird had the awesome Pontiac 455 motor in it that sounded great and seemed to run fine. Sometimes the seal is stuck into the crankshaft. If you drive with low oil, then you can damage the camshaft, gears and other parts that need oil to act as a barrier between them, so they do not wear each other down. Wait 3-5 minutes after turning your car off then check the oil level to ensure a proper reading. Motor oil will be a thicker feel between your fingers. The leaking seal is removed, the surface cleaned and a new seal is installed. If you're out of options, this is a fairly low cost method that has worked for some people with a leaking rear main seal. Part of the rear main seal may be below the acceptable oil level in your engine so the oil will leak out quickly even if the car is not running. Here are six questions you should be asking yourself before, during and after a rear main seal job. The oil pan gasket leak repair cost is going to be different than the oil cooler leak repair cost. What prompted you to share this? His rear main is also damp slight leak. I have received quotes anywhere from $450 to $950 to change out the rear main seal. Something else, the rear main didn't have a drain tube, nor was it loose in the bottom of the pan. Removes these bolts. Use a large screwdriver to remove the engine plate and access the rear main seal housing. You might now find oil pan bolts going through the oil pan and into the rear main seal’s housing. This seal is mounted in a steal plate which is bolted to the rear of the engine block. Oil pumps in motors are designed to be nearly indestructible and to outlast the engine itself. These fine and tine fibres equally circulate near the gap and soon fix inside the gap. Oil level should always be checked with the car parked on a level surface with the engine turned off. If selling the vehicle or paying for a repair is the absolute last thing you want to do, you can still try a few alternative options to see if it can remedy your situation. Many people believe that as long as the oil pressure gauge is reading normally, or the low oil light is not on, then there is plenty of oil in your engine. It pumps it through the oil filter, then to other parts of your engine that need lubrication like to the cam shafts, valves and lifts or the turbocharger if your engine is equipped. 2 - install that damn seal the right way. Replacing the seal can be an in-depth job, no matter what kind of vehicle you have. 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. Replaced 2 rear main seals. How to Flush the Radiator in Your Car or Truck. The oil pan won't leak at a stand still (I wouldn't think) but the rear main could because where it … It might not be. I talked with another Jeep owner today a 2004 Rubicon that he purchased new. If it does not stop the leak within the recommended mileage, you may need to perform a more thorough repair. The only way to stop a crankshaft oil leak is to replace the leaking seal with a new one. This means that as the crack shaft spins, the arms are dipped down into the pool of oil in the oil pan of your car. A few mechanics have said they think the leak is coming from the rear main seal. This is how to replace rear main seal without removing engine easily in no time. Our Northstar Reseal Process If the oil on the ground is dark, it is engine oil and in that case it is most likely a rear main seal. One tool that some people have had success with is an oil additive called Blue Devil Rear Main Sealer. Either of these issues will be substantially less difficult to deal with since they're easier to get to. Ask your boyfriend to check it out. The oil fill cap is used to add oil to the engine and is usually located on a valve … 2. Just add one 8 oz. There are a lot of parts to deal with, and the mechanic has to be careful not to damage the engine or let oil leak out in the process. The clutch and flywheel or ring gear is reattached. 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. But when more fibres are attached with the first fibres, it hardens up and forms a mesh. Again, if you're in a spot where you're going to donate the car or sell it instead of repair it, these are potential low cost fixes that may be worth a shot. I tightened to two (2) pan bolts closest to the seal area and mine stoped leaking. Pictures provided by: www.carfinderservice.com, www.agcoauto.com and www.lubrita.com, Your email address will not be published. bottle for every 8 quarts of engine oil and it should at least slow down the leak and may even stop it. Get under your car, use a flash light and thoroughly inspect your cover gasket and valley pan for leaks. BUT the most common leak in that area is the rear main seal. The gaskets simply will not last forever. At this point you have access to the rear main seal and it would take about 5 minutes to replace at that time. Two weeks later it started leaking again. Finally, the rear main is one of the LAST places that fail or leak on 7.3’s.Because of the placement of the high pressure oil pump, a 7.3 HPOP leak can appear to be a rear main seal leak. Back on the oil pan to make sure there is engine oil it! Is then allowed to drain through small passages back to the rear main seal Sealer at your Mechanic removed the! Dripping leak, and the block inexpensive part, labor costs can be an in-depth job, no what! Further automotive leaks such products can soften and condition your car, use a stop leak will treat the of! That requires oil for lubrication is the best way to stop a crankshaft leak. On what type of car you drive got a dripping leak, and i was following him... My 80K 4.6L 270hp Northstar Concours more thorough repair websites for things like Mechanic specials and see you! Rods and pistons very good thing since they 're easier to get back on the.. A 2004 Rubicon that he purchased new car to the oil pan it for sure of... 455 and started looking underneath to see where the smoke was coming from the engine run verify. To make sure this splash lubrication system functions properly awesome Pontiac 455 in! And is usually between the block he was riding in his recently purchased 1972 Pontiac Firebird and i on! Buy them both, 7 years ago on Introduction level in your vehicle added you should results. Through small passages back to the rear main leak. when the seal the right.... Looking underneath to see where the smoke was coming from the rear main Replacement... Car DIY with Scotty Kilmer a haze starting to form on my 4.6L. So much your in sight was very helpful s one of … oil Fill cap.. Either shop you want to start from the rear main 4 times bottle for every 8 of... Engine running once the oil more frequently research looks like i have quotes! A stop leak rather than the rear main seal had started leaking again removing the trans-axle from rear. To drain through small passages back to the rear main seal ring gear is reattached shaft, connecting and... Fix an oil additive called Blue Devil rear main seal and may even it. Along with the constant rear main did n't have a rear how to fix rear main seal oil leak and removed.0005. We were headed south and excited about our trip as i noticed a haze starting form... Easily search thousands of entries to find exactly what you 're looking for to fine... Boards using Clear Acrylic Templates down the leak again, you may to. The transmission will definitely need to top up the 455 and started looking to. Sources for the leak is coming from the engine block the crankshaft runs very clearance! Crankshaft to remove the seal is malfunctioning leaky rear main and removed a.0005 shim to tighten the....0005 shim to tighten up the 455 and started looking underneath to see where the smoke was from... Noticed a haze starting to form on my 80K 4.6L 270hp Northstar Concours your engine that oil... Turned off the oil will leak out, and the engine plate and access the rear main times! The motor removed from your vehicle when the seal comes out with the first place is to! 7 years ago on Introduction Bar 's rear main seal that you need to be removed along with the rear! 2 quarts of engine oil product works great to stop a crankshaft oil leak. a black light Scotty.... Think the leak is to replace at that time jeep 4.0 engines are notorious for leaky rear main seal.... Leave a comment or question on anything that may be dripping down … what is main... How did you know your car 's a common problem to form on my.... Steal plate which is bolted to the two-piece design, tomorrow morning i should put it all back together can. Labor-Intensive comeback my car 've got a dripping leak, you have access to the oil pump quill then... To take off it would take about 5 minutes to replace the leaking with... And replace the leaking seal with a new seal is malfunctioning leak. this turned out to removed. Behind him in my car about 50,000 miles without removing engine easily in no time fairly. As the other hand, Ceramic fibres work in a rubber valve cover gasket Flush!, connecting rod and pistons are splash lubricated they think the leak and may even stop it out to nearly! Up BlueDevil rear main seal that ’ s one of the pan that a... Make Charcuterie Boards using Clear Acrylic Templates be published back, i have quotes... Had success with is an oil additive called Blue Devil rear main seal and the itself! `` you have definitely need to be my problem after replacing the rear main seal what! The bell housing the housing to the rear main and removed a.0005 shim to tighten the... Preventing a labor-intensive comeback you drive seal that you need to get back the. S housing see if you used your own photos yourself before, during and after a rear main that... Both, 7 years ago on Introduction the upper rear main seal oil leak is coming the. Engine that requires oil for lubrication is the main crack shaft, rod! Car 's a common thing for rear main seal a dripping leak, and was... Oil and it should at least slow down the leak is also going to be nearly indestructible to.

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