Quote:
Originally Posted by Newsguy
The engine I'm assembling had oil starvation since the previous idi--owner drove it after the cam tensioners had disintegrated. There was debris blocking the oil pickup pretty much completely. The only effect was one main bearing toasted and the others had a little heat. The crank needed only a polish on the one journal.
I reassembled the bottom end and found a tight spot. Looking at it again, there were high spots in one shell. I'm going to follow professional advice and just try smoothing with some grey Scotchbrite.
Otherwise, I'll just get another shell.
Did you use the ARP bolts for the crankcase? I found it helpful since they are reusable and I have definitely used that feature!
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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.