[Shotimes] Compression Check

[Kevin & Cheryl Airth]

Kevin:
 I always do it with the engine at least as warm as possible. You want the
closet conditions to running as you can reasonable get. I never heard that
your more likely to cross thread plugs when hot? I have not done a SHO
compression test so maybe it's a little different? I use anti seize on the
plug threads and tester, just never force anything. Sometimes I will run a
tap thru them just to help prevent jumping a thread.
 You will have lower readings the colder the metal is. Does the shop manual
specifications say anything about using a warm engine? Or shooting some oil
in the cylinders after getting a low reading?
.
.



> The compression tester I just bought instructs me to do the test on a hot
> engine. The problem is that I would have to take the spark plugs out and
put
> back in on a hot engine, which I read in another forum is a no-no
(stripping
> heads and such.) Is it ok to do a compression test on a cold engine?