Quote:
Originally Posted by duxthe1
Were the cam towers discolored? If the cam was dragging enough to stretch the chain I'd expect the cam towers to be noticibly darkened.
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Discolored, hell - they were mostly black.
Anyway, I replaced everything and got the car on the road tonight - I'm just upset that I can't really put my finger on the cause of the problem and/or that I've permanently solved it. I really wish that I could have changed every gear involved (the crank gear comes to mind) but it's a $65 gear and $1000 to get at it.
I really played with the timing system a lot while doing this trying to come up with scenarios for chain slap. One thing I wonder about, if you have an older engine with compression leakdown, old valve springs, etc., the RH cam might turn a little further right after the engine stops, leading to the piece of chain between the gears to get a little "slack". In this case, even with new everything but an old engine, the chain is occasionally going to go slack in this area. I now have metal guides in the LH head, so this should help a lot.