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Yes, it happens all the time, thus the use of offset keys, eccentric bolts, etc. It it really only important if you're building a high-speed/high-power race engine. A stock street engine won't be an issue. You think they get that precise at the factory when they're throwing that stuff together?



Well that's what I figured, but if the centerline of the lobes lines up with TDC I can't see how it would
matter too much. I know after market parts can vary also. Hell I'm just happy I tore it apart to see what was wrong before real damage happened.
You know, you really should use the right width key in the key slot too..... well water under the
bridge, it's fixed now.

Thanks for the info.