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  1. #1

    Ok to check squish without rings installed?

    Setting up my squish on the bench, is it ok to check squish without the rings installed, or will it give false readings? 951 motor


  2. #2
    KrunchovXPL-GTX-RX's Avatar
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    I do not think it would mess up the reading since you check squish on the wrist pin axis which would prevent the piston from tilting (as it may tilt with rings).

    I would not want the piston moving around in there without rings though. Even if you are on the bench and doing it with a wrench and not the starter, the pistons are sliding around against the sleeve and you should avoid aluminum to iron contact as a general rule.

  3. #3
    Quote Originally Posted by KrunchovXPL-GTX-RX View Post
    I do not think it would mess up the reading since you check squish on the wrist pin axis which would prevent the piston from tilting (as it may tilt with rings).

    I would not want the piston moving around in there without rings though. Even if you are on the bench and doing it with a wrench and not the starter, the pistons are sliding around against the sleeve and you should avoid aluminum to iron contact as a general rule.
    Are you implying the piston skirt doesn't touch the cylinder walls while its running?

  4. #4
    KrunchovXPL-GTX-RX's Avatar
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    The skirt is one thing. Ring grooves and open ports is something else.

    Perhaps I should have worded it differently?

  5. #5
    I'm not going to be turning it over with the starter, the piston is only going to go up and down 1/2". Just want to know if the readings will be correct.

  6. #6
    KrunchovXPL-GTX-RX's Avatar
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    Quote Originally Posted by KrunchovXPL-GTX-RX View Post
    I do not think it would mess up the reading since you check squish on the wrist pin axis which would prevent the piston from tilting (as it may tilt with rings).
    nm

  7. #7
    SURFnTURF's Avatar
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    I usally check the squish with the rings on but cant see why you couldnt do it without.As long as you measure directly in line with the wrist pins front /back as stated in previous post.

  8. #8
    GTXX's Avatar
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    Quote Originally Posted by SURFnTURF View Post
    I usally check the squish with the rings on but cant see why you couldnt do it without.As long as you measure directly in line with the wrist pins front /back as stated in previous post.
    +1

    won't make any difference at all

    Andy, you think too much...

  9. #9
    I went ahead and did it. I am getting .085 without a head gasket and a 5 hole base. My goal is .065. In order to get that, i would have to remove the base gasket completely. Am i missing something?

  10. #10
    GTXX's Avatar
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    I always checked squish with the old head gasket torqued down

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