327 serious problem

[RALLY]

Originally Posted by Verne_Frantz

This is a stock rebuild of a 250hp 327 (owned by a friend). The engine only has 100mi on it and it was pulled due to a severe vibration. I can see that the exhaust valves show signs of over heating, but I'm not sure what the deposits are on the pistons. Maybe it's running so lean that it's melting the aluminum? He says the plugs are "clean". He was using Sta-Bil in the gas.

Any ideas anyone?


Verne


Attachment 181283

Attachment 181284

Severe vibration? Explain more? Is the harmonic balancer bad? Is the crank straight? How is the flywheel or automatic flex wheel? Sounds like to me its out of balance with parts i am listing? Not enough info to figure out what he means by this severe vibration? Was the timing to far advanced? Carb adjusted correctly? This engine does not have high compression.