Quote:
Originally Posted by torqhead
I wouldn't claim to be an expert here Jim, but something doesn't sound right. First if it was detonation you would have heard it, without a doubt, unless you were running open headers/exhaust. The whole thing about bad valve guides which allows oil leaking past them causing detonation I've never heard of (could be my ignorance). That problem is going to cause foul plugs and smoking when u first start the engine, but I don't think detonation. I would be leary at this point with the machinist, don't know the guy from "adam" but a number of machinist out there are very good about taking peoples money and that's it.... Best of luck.
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I'm not an expert either, but here are my thoughts of what Beaver said about the valve guides (possibly) leaking & causing detonation:
I think that he is theorizing that the unwanted oil being burned would eventually cause carbon in the CC which would result in 'hot spots'. Then you have pre-ignition.
My own experience with worn valve guides is that it usually only causes smelly exhaust in a closed throttle @ road speed senario.
I had a '66 Chevy with 283 that detonated terribly, but I sold the car without ever finding out the cause. It ran beautifully up until the last couple months that I had it. Under 70K original miles. And I was feeding it leaded gasoline (1979).