Is there a way to test compression while the motor is out of the car?

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  • LJ851
    R3V OG
    • Nov 2010
    • 7918

    #16
    The problem with compression testing without a starter motor will be getting the engine to turn over fast enough to get a semi accurate reading. As stated above, A leakdown test is best. It would be possible (maybe) to turn the engine fast enough to test compression by using a impact wrench on the front pulley nut. I would mark the nut to make sure you are not tightening it more and pull all the plugs out of the engine to minimize the load.
    Lorin


    Originally posted by slammin.e28
    The M30 is God's engine.

    Comment

    • LJ851
      R3V OG
      • Nov 2010
      • 7918

      #17
      .A bell housing off an 82 528e would not need to be cut up as it is removable.
      Lorin


      Originally posted by slammin.e28
      The M30 is God's engine.

      Comment

      • slammin.e28
        שמע ישראל
        • May 2010
        • 12054

        #18
        Originally posted by LJ851
        .A bell housing off an 82 528e would not need to be cut up as it is removable.
        Or one off of a blown 4hp22 from a M20 car. ;)
        1974.5 Jensen Healey : 2003 330i/5

        Comment

        • xikyle
          E30 Addict
          • May 2011
          • 526

          #19
          damn, you guys are on this shit. I think the motor has probably sat around for a year (maximum). it looks pretty solid, the head is yellowish. is there anyone around who can help me do it? i dont have a motorstand...
          Last edited by xikyle; 08-08-2011, 12:20 PM.

          Originally posted by ApexGoblin
          well make sure your priorities are straight... e30 first :up:

          Comment

          • xikyle
            E30 Addict
            • May 2011
            • 526

            #20
            and btw i can get that mystery oil stuff right by my house :-)

            Originally posted by ApexGoblin
            well make sure your priorities are straight... e30 first :up:

            Comment

            • euro2fast4u
              Banned
              • May 2009
              • 545

              #21
              wait where is the motor then? the head could be yellowish from getting clear coat on it and then heating up to that color does it flake off? hows the oil

              Comment

              • Farbin Kaiber
                Lil' Puppet
                • Jul 2007
                • 29502

                #22
                Cosmoline.

                Comment

                • xikyle
                  E30 Addict
                  • May 2011
                  • 526

                  #23
                  the yellow is inside the head, it doesnt flake off. the oil is dark as a truckers coffee. the motor is at the shop where im doing the swap. but i want to test the engine before i put it into the car.

                  Originally posted by ApexGoblin
                  well make sure your priorities are straight... e30 first :up:

                  Comment

                  • euro2fast4u
                    Banned
                    • May 2009
                    • 545

                    #24
                    so bring a transmission and starter and a battery and spin it over.

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                    • xikyle
                      E30 Addict
                      • May 2011
                      • 526

                      #25
                      Originally posted by euro2fast4u
                      so bring a transmission and starter and a battery and spin it over.
                      the only starter i have is in my car, i have a transmission but no spare starter

                      Originally posted by ApexGoblin
                      well make sure your priorities are straight... e30 first :up:

                      Comment

                      • slammin.e28
                        שמע ישראל
                        • May 2010
                        • 12054

                        #26
                        Originally posted by xikyle
                        the yellow is inside the head, it doesnt flake off. the oil is dark as a truckers coffee. the motor is at the shop where im doing the swap. but i want to test the engine before i put it into the car.
                        If it's at a shop, they should have a leak down tester/air compressor. Do that. /thread.
                        1974.5 Jensen Healey : 2003 330i/5

                        Comment

                        • xikyle
                          E30 Addict
                          • May 2011
                          • 526

                          #27
                          Originally posted by slammin.e28guy
                          If it's at a shop, they should have a leak down tester/air compressor. Do that. /thread.
                          ight holmes

                          Originally posted by ApexGoblin
                          well make sure your priorities are straight... e30 first :up:

                          Comment

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