I run a recent professionally rebuilt AAZ which showed no leak when I ran it first from the machine shop last year. I have hardly used it, maybe 2 hours altogether. Now there is an oil leak which seems to originate in the block to head interface on the vacuum pump side. My question: should I check the torque of the cylinder head 10 bolts? Do these normally have to be retorqued after a rebuild?
Thanks.
Haybayian