Compression test numbers, Am I doing this correctly?

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  • ZekeTheSneak
    E30 Mastermind
    • May 2010
    • 1562

    #1

    Compression test numbers, Am I doing this correctly?

    So I went and checked out a s52 today. Everything looked good so we started the compression test. I wanted to compression test everything with the rings dry of oil after sitting but when I pulled a coilpack it was swimming in oil in number 4 and 5. Basically 4 and 5 were forced to be tested wet.

    Compression came out good, 123and 6 were all 190psi after five revolutions. 4 and 5 were of course higher around 210 after five revolutions.

    We then ran a wet run, everything came out to 210psi at five revolutions. They were all pretty equal on the wet run.

    Anyways I walked for the time being, The guys cool and said no rush its not going anywhere quick. Should I let the thing sit for a few days and go back for a dry run? or is everything good to go?

    I pulled the valve cover and it is in great shape. 135k on the clock.

    IMG_20170326_145655 by ZekeTheSneak, on Flickr

    Recommendations fellas?
    Last edited by ZekeTheSneak; 03-26-2017, 05:23 PM.



  • digger
    R3V Elite
    • Nov 2005
    • 5929

    #2
    if 4 of them were 90psi and came upto 210 when oil was added id avoid right there
    89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...

    new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

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    • ZekeTheSneak
      E30 Mastermind
      • May 2010
      • 1562

      #3
      Sorry I forgot the 1. Yah 194. I'll edit it.
      Last edited by ZekeTheSneak; 03-26-2017, 05:23 PM.



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      • pazi88
        E30 Addict
        • Sep 2015
        • 584

        #4
        That's all good.

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        • Steve Corbett
          E30 Addict
          • Jul 2012
          • 449

          #5
          The oil around the plugs when you pulled the coil packs is a leaking cover gasket if I'm not mistaken.
          sigpic
          Steve Corbett
          1983 528E Scrapped
          1983 528E Sold
          1984 745I
          1984 325E - Sold
          1989 325I Bronzit-Sold
          1989 325I Zinno
          1988 635CSI

          Comment

          • ZekeTheSneak
            E30 Mastermind
            • May 2010
            • 1562

            #6
            ^yah I figured that one. Im more trying to make sure I don't get a false reading with the cylinders oiled.



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