Quote:
Originally Posted by DetroitP
Good points!
Can you point out some of the things to look for that could make the block non-usable?
Thx
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You will have ZERO way of telling for sure until you've bought and disassembled the engine (removed the bed plate and crankshaft). Most failures with these engines are oil related. A few are injector failures. Injector failures usually damage the cylinder's wall so to save those blocks you'd need to bore it out and use custom pistons ($$$).
Oil and bearing failures... If a rod bearing fails they usually aren't caught in time and shut off before either the rod blows and puts a hole in the block or the main spins due to the heat. Many times the rods have failed secondary to a main bearing failure. Those main failures
always result in a cracked main bearing web which scraps the block. So basically any type of oiling related issue will usually ruin the block (even if it's still running at time of removal).
There is a very short window of allowable time between when a bearing fails and when it eats the block. Most engines suffer bearing failures and the owners keep running them to diagnose the failure- taking videos, driving to various shops to listen, etc... They unwittingly finish them off.
9 out of 10 bad engines we get as cores have unusable blocks. Many of them still run. I've got pallets of S65 parts and no good blocks to be able to build engines with.
Unless they've already dismantled the engine to diagnose component condition, (why not rebuild themselves at that point?), Sellers will have no way to say whether the engine is truly rebuildable. They'll plead ignorance so they can unload their pile of parts.