Just wondering what the general consensus out there for the amount of times the vehicle turns over during a compression test? I have heard anywhere from 5-8, and personally crank 7. What is the desired number of revolutions to ensure an accurate reading?

1 Answer 1


I do it until the gauge doesn't go up anymore. I am not aware of a specific number of times that it needs to be done. That usually takes 6 or 7 times, but I have never actually counted.

  • 1
    That's pretty much what I've been taught to do, too. Commented Aug 11, 2011 at 23:38
  • That was what I was taught also. Other cylinder plugs removed, throttle held open, choke open, crank until the gauge stops moving up.
    – edt11x
    Commented May 31, 2022 at 16:21

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