Originally Posted by
Jenz38
John,
Do you know this Engine has running with the old 0.40 Bore without Problems ?
Jens,
The current owner purchased the engine used and tore it down to check clearances. At that point he determined it had a .040" overbore, and the piston to cylinder wall clearances were out of tolerance. Not wanting to knurl the pistons, he took the block and head to a machinist for cleaning, asked for sonic testing (which was not done), and agreed to the machinist's recommendaton of an additional .020" overbore, for a total of .060 over stock. I don't recall him stating the prior owner mentioned anything about the engine being "broke". Additionally, once the head from this engine was cleaned the machinist told him it was not good, it was cracked. Told me the machinist said the head looked someone had cracked it with a prybar. I do not know if the head was cracked on the same side as the block is, or on the opposite side. I'll check with my friend and see. John
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