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Is it possible to replace a Two-Piece Rear Main crankshaft seal on a '79 C3 SBC without pulling the engine? Manual tranny, bell-housing, clutch and flywheel have been removed. Can the oil pan be dropped without pulling the engine?
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Yes. The oil pan can be dropped by disconnecting the steering idler arm, and pitman arm, and let the steeering linkage drop down. To replace the main seal you will need to loosen (but NOT remove!) all of the main cap bolts to allow the crank to drop just a bit to give some clearance to remove and replace the main seal pieces. Be sure to retorque the main caps bolts properly, and make sure the ends of the main seal are NOT lined up with the split at the rear main cap...the seal needs to be off-set a little to keep it from leaking there.
Joel Adams
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in Forum: C3 Engines, Driveline and Handling
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