Question about 1983 Chevrolet Silverado
I'm fairly certain that your engine does not have a full circle external main seal (if when you remove the trans and flywheel you find the rear crank flange is bolted to the crank and not part of the crank, then I'm wrong) If it's not an external seal, it is two piece, located in the rear of the main bearing cap. That makes it necessary to remove the engine oil pan and the rear bearing. Before contemplating doing anything with that, make very sure that the leak is not from the intake or valve covers first. Otherwise you'd be doing ton of work for no reason. Wipe everything down and look carefully. If it's leaking fast it shouldn't be difficult to see.
Posted on Mar 14, 2011
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Posted on Jan 02, 2017
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That sounds to me like a shaft that connects to it is out of balance. Therefore the seals are getting worn out too soon.
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