My 408 on a 5.9L engine was built w the double roller chain and a mopar tensioner. I did a refresh after a lifter failure wiped the cam 10 years later. Cleaned up everything and reused the roller chain and tensioner. Almost no wear on the tensioner pad, just polished. Plus I like the bracket for cam retainer better than original.View attachment 1715864990
A lot of slack in that chain you pictured . Must be a chinese chain or improper fitment . How did you adjust the cam timing? 10 years and no wear on a teflon wear pad? Lifter Failure wiped the cam? and your happy with it?
Chordal action from the chain links rolling over the sprocket could have had something to do with the lifter spin interference. A tight arc in the chain over sprockets cause this.
What I wrote above did not come from me. It was copied and pasted from Hughes Engines. This info is a warning from many mopar engine information outlets recently. My son owns an engine machine shop and was also made aware and he will not use a tensioner on any small block Mopars with a tru-roller. Great to use with a factory style link chain with light tension valve springs where cam timing is not critical.
(quoted from article)
("The rise or fall results in linear variations of the speed of the chain, and if the rise and fall are significant, the camshaft operation may be jerky with excessive noise and rapid chain and sprocket wear. The chain would have minimal chordal action resulting in smoother camshaft rotation with a gear not a sprocket") JERKY CAMSHAFT OPERATION CAN CAUSE LIFTER SPIN INTERFERENCE