Well, I adjusted the exhaust valve on that cylinder to 0.011" or thereabouts, and the behaviour was distinctly better on that cylinder. Not completely better, but definitely an improvement.

So... maybe it's an ACR issue. Am I doing any damage by running it with a large valve clearance like that? This engine calls for 0.004" to 0.006" so I'm kind of breaking the rules here. Obviously the proper fix would be to replace the camshaft, but it's quite usable now - do you guys think I can get away with this "band aid" fix for now, given that the engine has no problem starting (i.e. the reduced ACR action on that cylinder isn't a problem for starting)?

Thanks,
RLP

Last edited by RLP; 31/08/19 06:31 AM. Reason: Change wording