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. Numerous Internet forums confirm this habitual engine bleeding and the resulting frustration to the owner. Oil Leak from Crankshaft Rear Oil Seal. Solving why the seal failed in the first place is critical to preventing a labor-intensive comeback. 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. A mechanical scroll seal is incorporated here. Here are six questions you should be asking yourself before, during and after a rear main seal job. Ineffective sealing between seal and housing due to machining irregularities. 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. Head Gasket REPAIR STOP COOLANT LOSS THERMO WELD NEW PRODUCT NOW IN THE UK . Perhaps this is because of a rear main seal leak in your car. A rear main seal leak is likely the most expensive oil leak any 3.0 or 3.3 liter V6 owner will be tasked to repair. GM reports that a new design crankshaft rear main oil seal and installation tool (EN-48108) has been released. The most common leaks that can masquerade as a rear main seal leak is a valve cover gasket leak, intake manifold gasket leak or a distributor gasket leak. Leak itself is very minor and did about 12000miles with it so far. Tech Tip: Engine Oil Leak at Rear Main Oil Seal. If the crankshaft seal dries out, cracks, or breaks, it can cause an oil leak. I am facing the seal the proper way. This seal incorporates features that improve high mileage durability. The two edges of the seal will match up inside the recess and no leakage path should result. - Woody Allen. Over-filled sump may - you need to correct that. Though the seal is a fairly inexpensive part, labor costs can be expensive. Contact between a rotating shaft and a seal causes shaft wear. Are the cork pieces for the pan gasket installed? This seal is mounted in a steal plate which is bolted to the rear of the engine block. So replaced the crankshaft seal with new one and made sure it was centered before and after tightening the housing bolts and the oil pan bolts, and checked again for a groove on the crankshaft - clean. The crankshaft rear seal on your Kia Picanto keeps engine oil inside the engine, and dirt and debris out. Here is an engine repair tip for fixing a leak on a hard metal shaft where the old seal wore a groove. Bulletin Number - 0019. The seal can also leak due to the vehicle being stored for an extended time, or from running the engine oil too low. The rear main seal started leaking so I first replaced the lower half, the leak got worse. "I don’t want to achieve immortality through my work. £14.99 + P&P . 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