OEM Chevrolet Silverado 1500 Classic Crankshaft Seal

Chevrolet Silverado 1500 Classic Crankshaft Seal Parts Questions & Experts Answers

• Rear Main Seal
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  Q: How to replace the rear crankshaft seal on Chevrolet Silverado 1500 Classic?

  A: Before installing a new crankshaft rear oil seal you must remove the Flywheel. A flat-tipped screwdriver should be used to separate the seal from its housing while you dispose of it after you clean any residue in that area. Two to three drops of clean engine oil need to be applied to the housing bore and the outside diameters of both the engine Flywheel pilot flange and Flywheel locator pin as well as to the Crankshaft Seal surface. The new design reverse-sealed this side out marked component represents the new style. Examine the j 35621-b rear main seal installer (J 35621-B) flange for surface imperfections then smooth them down with fine grade emery cloth. You should prevent the seal lip area from touching any lubricants or oil. Swing the protective sleeve off the seal before applying 2 to 3 drops of clean engine oil onto the outside diameter. First install the j 35621-b and its attached seal against the crankshaft's rear side before tightening its tool bolts by hand until they are evenly snug. Correct positioning of the crankshaft rear oil seal demands absolute precision. Installation must occur near flush while maintaining a square relationship with the housing. Use constant clockwise pressure on the j 35621-b wing nut to drive the seal against the housing bore until you feel increasing torque before reaching the lowest housing position. After turning the wing nut clockwise to release the j 35621-b you should remove it and then clean any remaining engine oil from the tool with a new rag before reinstalling the engine Flywheel.