I am considering removing my head to have the guides done. I have an occasional puff of blue at start-up, no smoke at any other time. The motor has 110k miles on it. I replaced the valve stem seals about 5k ago and will first check to see if one of them has come loose before I remove the head.

When I removed the chain tensioner I found it to be in the first detent position suggesting the chain hasn't streched much. Looking at the chain guide of the tensioner it looks like brand new except for a small 1 thou deep groove about 2 inches long. See the pictures attached. I'm wondering if this is considered low wear or if I should replace these items? I don't want to remove the lower timing cover if I don't have to. To me it looks like the tensioner/chain had already been replaced.

Opinions?

Jorg

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