For the tensioners to last, the edges of the timing chain links must be
smooth, so the chain does not act like a chain saw on the tensioner blade.
The same problem occures on the TR-4 engines. The original tensioners were
all "hardchrome" plated to resist wear.In the past, in addition to having
tensioners hardchromed when they are not available that way, we have also
polished the outside edges of the t/chain links smooth using a die grinder
and cartridge rolls. The problem is then getting all of the griinding debris
out of the chain links and pins. The chain needs to be very thoughly cleaned
after the grinding operation. For the TR-4 engines, we now have chains in
stock that have machined edges to the links that are smooth enough to use as
is. I still think that the tensioner blade should be hard chromed.
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