- turning a cam and or a crank at this point might cause another collision
- removing the cams will assure that all (unbent) valves close
- w/o the cams, a stuck valve's stem will be lower and can be detected
- a leakdown tester (you can rent those things) can be used (with caution)
to test for damage, loose rings, bad valves, seats etc.
- if all the valves are closed, with the cams out the crank can be turned
- if a valve is broke it's possible, but not likely, that a stem can be
pulled up when the cam is removed.
-Jim
On Tue, 29 Apr 1997, Richard de Tarnowsky wrote:
> The suggestion of removing the camshafts to run a compression test would
> at least avoid further damage to the valve train. This approach would
> require using compressed air (at very low pressure) applied to the spark
> plug hole while checking the intake, exhaust, and oil filler for signs
> of leakage. This can bent/pinpoint leaky valves and also detect blow-by
> (leaky piston rings).
>