I decided to send some pictures of the 400 Pontiac engine I stripped to the core.
This is before the hot tanking and core plug removal. That happens next week at Beatty & Woods. The engine is standard bore and completely stock. I got a nasty surprise with the crankshaft. It is scored big time. I included a close up of the bearing journals so you can see the ridges between rod bearings. It looks like the owner ran it hard without fresh oil. I'm amazed the crank didn't seize or snap. The tolerances were probably too large to seize. I bet it rattled something fierce. Looks like I need new crankshaft and rods for sure.
Notice the split dowel pins in the main bearing saddles? Pontiac started doing this in 1976 or so on their W72 blocks to reduce stress under load. It must have worked because this engine was punished for certain and the crank didn't break. It helps that they used Arma Steel as well. The bearing caps and the journals aren't blue so it wasn't heat damage. Just dirty oil and low oil pressure. By the way, this is one of the early W72 units with 40 psi pump and non sump pan. This was built in July 1977.
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