[Formulajones]

Originally Posted by 78w72

But the engine in question wasnt a 2bbl, it was a HO (insert year, cid & code here) that had good oil psi etc etc. The main thing with that example was that the engine was never really driven after that or abused at high rpms, it started knocking in the driveway after the heads were rebuilt. Compression wasnt raised to cause detonation, if anything they might have had a .003 clean up that wont change the comp anywhere near enough to do damage. Highly unlikely the rebuilt heads caused the bottom end to fail on that engine.

I do agree the bottom end was fubar'd & on its last leg to begin with, and that 2 gallons of ATF, 2 different times probably didnt help the situation, but the rebuilt heads didnt "cause" the bottom failure.

It failed because he's running a crank case full of transmission fluid in it. That for sure scored bearings and cylinder walls running it for any length of time, and he said he did that more than once.
Then tears it down for a head rebuild and claims it killed the short block because a knock suddenly appeared? Yeah ok lol