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    Compression test

    Hey Guy's

    I have an M20 B25 2.5 liter motor what is the average cylinder compression supposed to be?
    Thanks for your help

    #2
    Is google down or something?
    Took me all of 30 seconds to find out. But somewhere between 142-156psi according to the Bentley
    What it feels like owning an e30:

    88 325 S50 swap in progress
    90 325ix

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      #3
      Hey Man thanks for the reply, Sorry to bother you on a Sunday
      But thanks

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        #4
        I was also wondering if its better to have the motor hot or cold while testing the compression, or does it really matter.

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          #5
          doesnt really matter it should not make a huge difference either way but i find it easier to wok on cold things
          Shawn @ Bimmerbuddies
          Bimmerbuddies LLC
          717-388-1256
          2971a Roundtop Rd, Middletown PA 17057
          bimmerbuddiesllc@gmail.com

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            #6
            Agree

            Originally posted by SmokeE30 View Post
            doesnt really matter it should not make a huge difference either way but i find it easier to wok on cold things
            I agree was just wondering
            Thanks

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