Compression test...

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  • mtechnik
    R3V OG
    • May 2006
    • 6156

    #1

    Compression test...

    Good day guys,

    How long do these normall take to do and what is the average cost?

    I FEEL as though my car pulls strong still but yah.. i wanna know how healthy it really is.

    Car is on the brink of 250.000 km's and have no idea if the motor was ever rebuilt.

    Thnx in advance
    Mtechnik



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  • FredK
    R3V OG
    • Oct 2003
    • 14752

    #2
    It should take less than an hour. $50?

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    • mtechnik
      R3V OG
      • May 2006
      • 6156

      #3
      hmm doesnt sound damaging to a college budget. Figured it would be less than a dyno run



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      • EtaSport
        R3VLimited
        • Oct 2003
        • 2853

        #4
        You could buy the kit and do it yourself for less than that. Its not difficult at all.
        Old and improved:

        Comment

        • mspiegle
          E30 Enthusiast
          • Oct 2003
          • 1026

          #5
          Craftsman kit is around $60. Its very easy to do yourself. Just remove the spark plugs, disconnect the coil mail wire, and start testing. The Craftsman kit is actually a very good kit and comes with lots of attachment options.
          Michael Spiegle

          '01 Ford Escape / Daily Driver
          '99 M3 / Track Car
          '87 325is bronzit / wtf car
          '06 Daytona Triumph 675 / Daily Rider

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          • mtechnik
            R3V OG
            • May 2006
            • 6156

            #6
            thnx for the tips..keep um coming



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            • Brew
              No R3VLimiter
              • Oct 2003
              • 3060

              #7
              Pull the fuse or relay for the fuel pump and let the engine die before you pull the spark plugs, and make sure you hold the throttle wide open while you're cranking. Its also not a bad idea to have the battery on a charger while you're testing, so that the cranking speed doesn't slow down too much.
              '91 318is
              sigpic

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              • SpecM
                R3V Elite
                • Oct 2005
                • 4531

                #8
                -Its very easy to do, maybe you have a mechanic friend with a tester already?
                1989 cirrisblau-metallic 325i

                Comment

                • lordofthewaters
                  Mod Crazy
                  • Oct 2005
                  • 714

                  #9
                  I'd check ebay for the compression kit. I've seen Craftsman sets for as low as $12, and a Mac one once for $25.

                  Sarcasm is a body's natural defense against stupid.
                  When a man talks dirty to a woman, it's sexual harassment. When a woman talks dirty to a man, it's £3.95 per minute.
                  "My mother never saw the irony in calling me a son-of-a-bitch." Jack Nicholson"
                  Old age and treachery will always overcome youth and skill.



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                  • mtechnik
                    R3V OG
                    • May 2006
                    • 6156

                    #10
                    My tech does compression test. have gotten a qoute from him yet



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                    • mtechnik
                      R3V OG
                      • May 2006
                      • 6156

                      #11
                      *haven't



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