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Check here for special coupons and promotions. 89-18 Dodge 5.9L/6.7L Cummins Rear Main Seal 1989 - 2018 Dodge 5.9L & 6.7L Cummins Rear Main Seal with cardboard inner ring Does NOT come with the steel ring. Most medium and heavy duty truck part stores sell inframe rebuild kits complete w/ a reman head for $3500 to $5000. We sell crankshaft main bearings, front and rear seals for Cummins ISB and QSB engines. You can easily access our inventory by visiting the product links listed below. If you do not see the part you are looking for, please use our quote request form or call us at 855.470.3525: our knowledgeable sales staff will gladly help you. The rear main seal in your vehicle holds the engine oil in the oil pan while allowing the crank shaft to exit the engine block.
The main seals are the composite rings that encapsulate the ends of the crankshaft, that keep the crankcase oil from gushing out of the engine. Fill inner groove of new rear main seal with a lithium grease / assembly lube. Hold seal against crank and keep it aligned with your hand while driving it in with a plastic-tip hammer.