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Does engine have to be pulled to change front and rear main seal on Pontiac 400 engine?
Wiki User
∙ 16y ago
front main seal is installed in the aluminum timing cover, so you have to remove the accessories that inhibit access-water pump, alternator and possibly the ac compressor, you may also want to remove the radiator if needed just to have more room to work
the rear main seal is accessed by dropping the oil pan and possibly needing to raise the engine to have enough room to loosen the main crank bolts, dropping the crankshaft enough to remove and reinstall the rear packing/seal. to raise the engine, you will need a sturdy engine hoist and remove one or both of the motor mount bolts
carefull when lifting the engine /transmission combo, as they are heavy and the distributer is on the top rear of your engine-it will be close to the firewall and could get crushed if you dont keep it in mind front main seal is installed in the aluminum timing cover, so you have to remove the accessories that inhibit access-water pump, alternator and possibly the ac compressor, you may also want to remove the radiator if needed just to have more room to work
the rear main seal is accessed by dropping the oil pan and possibly needing to raise the engine to have enough room to loosen the main crank bolts, dropping the crankshaft enough to remove and reinstall the rear packing/seal. to raise the engine, you will need a sturdy engine hoist and remove one or both of the motor mount bolts
carefull when lifting the engine /transmission combo, as they are heavy and the distributer is on the top rear of your engine-it will be close to the firewall and could get crushed if you dont keep it in mind
Wiki User
∙ 16y ago
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