Ok Group,
Most engines have a predictable
torque for turnover in a "like-new" rebuild. We should check
with Mazda to see if they have a suggested new engine turnover torque.
When I was building racing engines the manufacturers had VERY specific
suggested torques, and if your engine didn't meet spec they (cosworth in
this case) suggested you tear it back down to find out what the problem was,
or risk engine damage.
!!! Warning Anecdote alert !!!
One of the engines I regularly rebuilt for racing was the
Kawasaki
Z1-B
903cc 4 cylinder. I was helping a friend using this engine in his D-sports
racing car. He was a very
competent
mechanic and often did portions of the build (it was his car) so I would only
do the critical stuff, like cam timing for instance. We had finished one of
these 2-man rebuilds and I turned over the engine BY HAND without the plugs
installed. These engines used a roller bearing crankshaft so turnover torques
were usually very low. Most of the revolution
was easy but at
TDC there was just the slightest "tick".
The owner wanted to start the engine but I refused to let him. I pulled the
cams and the cylinder head. I
Bill Jepson