REFLECTOR: Compressions

[Scott Derrick]

I'd expect them all to be at or above 70/80

Be sure to check when warm,.
If you have a low one( < 65),  run the engine 15 minutes and try again.
If still low, squirt some oil in the cylinder(try to get between piston 
and ring), crank through a few times and try again
If still low, run for 5 hours and try again.
If still low, with somebody trustworthy holding prop at TDC with air 
pressure on, listen in exhaust stack for that cylinder, listen in intake 
and listen in oil filler.  If you can hear a distinctive whistle or air 
leakage sound in one of those, you know where the leakage is, exhaust 
valve, intake valve, rings respectively.

Scott

Kevin Baker wrote:
> Hi All,
> What kind of compressions would one expect from a
> IO360 C1 200 hp 2001 Overhaul with 150 hours?
>
> Thanks,
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