Line honing crank journals

moper said

I think that should be clarified. It's not that it has nothing to do with it, it does have an effect. The tensioner affects the cam timing by reducing the possibility of slack being introduced into the drive side as the chain wears - it reduces cam timing variance over the service life.

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Not making sense..... the tensioner only takes up slack on the slack side of the chain. Wear/stretch will occur all along the chain, and will show up in the drive side and allow cam timing to slowly retard as the chain wears/stretches. If you mean variance as it runs, then agreed. The cam load varies a lot as it rotates, and the chain will whip around quite a bit when it gets an slack in it. But the aftermarket tensioners for the SBM are pretty wussy IMO; engines that have more serious tensioners have oil pressure activated tensioners that apply more tension as the oil pressure and RPM's rise..