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    M42 No Start

    Been trying to get my 91 318 running again after rebuilding the head. Original head had a crack, leaked antifreeze into number 2 cylinder. Used head off a M42 from a E36. The cams were worn and mine were excellent shape. Lapped the valves after I disassembled the head. Reassembled with my E30 Cams. Used the cam timing blocks to make sure the cams are timed to the crank. Double checked the index marks and cam timing, pin is in the flywheel index hole. Everything lines up. Replaced the timing chain and gears as they were worn to a point. Initially used the E36 gears, Resulted in a no start because i did not have the trigger for the CPS. Installed a new E30 timing gear on the exhaust cam as that is the one the sensor looks for. The intake has no sensor, so either cam gear will work. Then I found the fuel pump was inop. Replaced it have fuel at the injectors, visually confirmed with injector rail uninstalled. Reinstalled everything, still no start. Now the crazy part. If we swap the coil pack plug wires, it will start with throttle wide open, Runs terrible but it semi-starts. to me, it should not run and possibly be backfiring. I checked the coil input wires back to the ECU. Verified number 1 coil is connected to the ECU correctly. All 4 pin out correctly.
    sigpic
    Steve Corbett
    1983 528E Scrapped
    1983 528E Sold
    1984 745I
    1984 325E - Sold
    1989 325I Bronzit-Sold
    1989 325I Zinno
    1988 635CSI

    #2
    Have you checked compression
    Originally posted by wholepailofwater
    Q
    :devil:


    WTB: Dove Grey e36 Front Door Panels (2 door)

    Comment


      #3
      Yes, 1,3 and 4 are over 200. #2 is lower.
      sigpic
      Steve Corbett
      1983 528E Scrapped
      1983 528E Sold
      1984 745I
      1984 325E - Sold
      1989 325I Bronzit-Sold
      1989 325I Zinno
      1988 635CSI

      Comment


        #4
        Are you 100% sure the cam gear is on the right way? Running badly at full throttle sounds like it's getting spark in the wrong order. Seen that before.

        IG @turbovarg
        '91 318is, M20 turbo
        [CoTM: 4-18]
        '94 525iT slicktop, M50B30 + S362SX-E, 600WHP DD or bust
        - updated 1-26

        Comment


          #5
          Yes, The cam gears are indexed with the center of the cams, Cams are aligned with indexing tool. Cams have the double dots facing up. Number one cam lobes are pointing to each other. I agree, It seems to be out of time but don't see how.
          sigpic
          Steve Corbett
          1983 528E Scrapped
          1983 528E Sold
          1984 745I
          1984 325E - Sold
          1989 325I Bronzit-Sold
          1989 325I Zinno
          1988 635CSI

          Comment


            #6
            Can you verify spark timing with a timing light?

            IG @turbovarg
            '91 318is, M20 turbo
            [CoTM: 4-18]
            '94 525iT slicktop, M50B30 + S362SX-E, 600WHP DD or bust
            - updated 1-26

            Comment


              #7
              That is a good idea, No timing light at the moment. Pretty sure we have a ignition timing issue. Not sure why though.
              sigpic
              Steve Corbett
              1983 528E Scrapped
              1983 528E Sold
              1984 745I
              1984 325E - Sold
              1989 325I Bronzit-Sold
              1989 325I Zinno
              1988 635CSI

              Comment


                #8






                sigpic
                Steve Corbett
                1983 528E Scrapped
                1983 528E Sold
                1984 745I
                1984 325E - Sold
                1989 325I Bronzit-Sold
                1989 325I Zinno
                1988 635CSI

                Comment


                  #9
                  check your vibration damper....ask me how I know...took me over 2 months to diagnose and turns out the VD was cracked and in two separate pieces. BavAuto has em new OEM for $100, you won't find em anywhere else for even $200

                  1991 318is ---230K - DD
                  1991 318i ---- 308K - retired

                  Originally posted by RickSloan
                  so if you didnt get it like that did you glue fuzzy oil to the entire thing?

                  Comment


                    #10
                    ^^ ouch!! Better check mine
                    NASA
                    BMWCCA member
                    PCA member 25yrs




                    1991 318IS slick top
                    1997 M3 sedan
                    2001 325CI DD

                    “whoever turns the wheel the least, wins"

                    Comment


                      #11
                      Originally posted by jrobie79 View Post
                      check your vibration damper....ask me how I know...took me over 2 months to diagnose and turns out the VD was cracked and in two separate pieces. BavAuto has em new OEM for $100, you won't find em anywhere else for even $200

                      $100, where? Show me a link, all I see is standard pricing.

                      Comment


                        #12
                        Originally posted by roguetoaster View Post
                        $100, where? Show me a link, all I see is standard pricing.
                        ouch, I just checked their website. it skyrocketed up to $520...that SUCKS.

                        Below is my receipt, you can see the price I paid and the date...sorry guys
                        Attached Files
                        1991 318is ---230K - DD
                        1991 318i ---- 308K - retired

                        Originally posted by RickSloan
                        so if you didnt get it like that did you glue fuzzy oil to the entire thing?

                        Comment


                          #13
                          Originally posted by jrobie79 View Post
                          ouch, I just checked their website. it skyrocketed up to $520...that SUCKS.

                          Below is my receipt, you can see the price I paid and the date...sorry guys
                          Wow, what a deal! Must have been an F up on their end.

                          If I saw it at $100 I would have picked up 3.

                          Comment

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