Quote:
Originally Posted by Homeoboxter
Yep, worn cam tensioners is a typical failure, one of my previous Porsches had to be rebuilt for the same reason, the tensioner wore off, fell apart, then the chain jumped over one or more teeth.
These high spots are surprising because the whole unit is pretty robust and should survive some extra heat without being damaged. Did you tighten the bolts down to the secified torque in the correct order? The bearing carrier halves have to be perfectly and evenly bolted to each other so the clearances will be the same all around.
I used genuine bolts.
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Since that post I have been fortunate to work with an experienced mechanic close to one of the major M96 sources (and worked there.)
He was worried the crank was bad so we had it checked. It's good so we are going with new bearings. He doesn't like the coated bearings and thinks that is the problem or there is an issue with the carrier.
I had really aimed for getting this on the road this summer, but as these things go, that is looking less likely.