The rear main seal is the crankshaft seal, if it leaks it leaks oil, it may not be leaking enough yet to drop on the ground, it will get worse though. Solving why the seal failed in the first place is critical to preventing a labor-intensive comeback. Is this leak from crankshaft seal? The crankshaft is the main driving force in the engine. Is it the rear main seal that is leaking? Check your PCV valve first. Just fix the rear seal! Perhaps this is because of a rear main seal leak in your car. Head Gasket REPAIR DURA SEAL NOW IN THE UK FREE POST SEAL FIX REPAIR. Just something to think about if you feel like you've installed the rear main seal the right way and can't figure out why you still have a leak. So, It’s important to check for leaks in your oil pan gasket before you jump to any conclusions. I installed the seal per the instructions and I did not use any sealers and I am keeping the ends of the seal dry before assembly. Crankshaft rear seal/rear main oil leak replacement How much does a crankshaft rear seal/rear main oil leak repair cost? Since the seal is flexible it can be manipulated around the crankshaft before the crank is assembled back into the engine and the bearing housings replaced. If the owner of a 1986-2008 GM passenger car or light-duty truck comments on external oil leakage, a new design crankshaft main oil seal has been released, which incorporates features that improve high mileage durability. Rear engine oil leaks that are confused with a rear main seal leak are usually an oil pan gasket leaking. Here is an engine repair tip for fixing a leak on a hard metal shaft where the old seal wore a groove. Here are six questions you should be asking yourself before, during and after a rear main seal job. Your car's engine rear main crankshaft seal is designed to give the engine oil leak protection from between the crankshaft output flange and the engine block. Do you have the correct dipstick? While not common, the rubberized seal at the back of the engine, sealing the crankshaft at the back of the engine block where it bolts to the flywheel, will eventually dry out and leak. Date - 18.08.1999. Can't remember, but are the holes in the crankshaft for the flywheel through holes? A mechanical scroll seal is incorporated here. I am facing the seal the proper way. Cause. July 30, 2016 Some 2016-2017 Encore and Cruze models equipped with the 1.4L engine (RPO LE2) and 2016-2017 Malibu and Volt models equipped with the 1.5L engine (RPO LFV, L3A) may have a leak at the crankshaft rear oil seal. Crankshaft Rear Oil Seal Leak. I lose 4-6 oz of oil on a 20 mile drive, and rustproof a good bit of the undercarriage at the same time (lol). An Overview: On the British A Series engines, and some others, there is no positive crankshaft seal on the rear main bearing. Issue - 1. I tightened the oil-pan bolts a little more but still leaks from same area after washing underside of car. Did you use any sealer? Unfortunately, it’s a bad thing to happen, as it causes a range of problems to the vehicle. Small leaks can cause oil to accumulate on the undersides of the engine, while larger ones may produce a drip of oil from the front of the engine. - Woody Allen. Save Share. The rear main seal started leaking so I first replaced the lower half, the leak got worse. It sits low inside the engine block, usually just above the oil pan (also known as the sump), and counterweights splash oil to lubricate the main bearings. Abnormal crankcase pressures caused by a restriction in the induction system may lead to an oil leak at the crankshaft rear oil seal. MGA engines do not have a rubber seal at the rear end of the crankshaft. https://gobdp.com/blog/how-to-repair-a-leaking-crankshaft-seal Is the valve cover leaking at the rear? Oil pressure is not likely to cause the rear main seal to leak. The seal can also leak due to the vehicle being stored for an extended time, or from running the engine oil too low. GM reports that a new design crankshaft rear main oil seal and installation tool (EN-48108) has been released. Consequently, An oil pan gasket is also much less expensive to replace than a leaking rear main seal. At the very rear of the engine block the crankshaft runs very close clearance to the block and main bearing cap. Crankshaft rear seal/rear main oil leak replacement How much does a Kia Picanto crankshaft rear seal/rear main oil leak repair cost? OIL LEAK FROM CRANKSHAFT REAR OIL SEAL. Replace the crankshaft rear main oil seal with the new design rear main oil seal, p/n 12592195 (Canadian p/n 31022784) using the following procedures. Ineffective sealing between seal and installation tool ( EN-48108 ) has been released likely. 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