[Chevy454]

Let me first apologize for the non-S/S question...

A truck puller friend of mine called me this morning...he had an engine come apart over the weekend, and upon the tear down he found some rather alarming things...which leads me to my questions:

(1) will piston-->head contact result in bearing failure? (looks like there's been contact for a while)

(2) what is the protocol in regards to reusing roller lifters on a different cam? (builder put in a different cam, but threw in a used set of rollers he had on the shelf, and one of the "connectors" between the pair of lifters broke, naturally allowing the roller to spin)

My thoughts are that the piston to head contact is a no-brainer, considering the fact that detonation can take out bearings, and actual contact will be a LOT more violent than that! As for the roller lifter question, I'm an old fashioned solid-lifter guy, so rollers may be different...but I always thought if they weren't Shubecks, then a lifter change with a cam change was cheap insurance...but again, I don't know how it is in the land of rollers.

Anyway, he's hooked to the sled exactly TWICE this season on this engine, yet he said it's had a severe miss/stumble since he got the engine from the engine builder, and on the 3rd try it came apart in a bad, BAD way...as of now, the engine builder ain't exactly offering to help my buddy out on the engine.