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Let's make an E30 M3! (M3 S14 cabrio clone project)

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    At least it didnt grenade the cylinder!
    1989 BMW 325is | 2019 Ford Ranger FX4
    willschnitz

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      Perform a leak down test.


      Need OE BMW or Aftermarket Parts? Shoot me a PM! | Leave me feedback here
      (631) 393 0334 | info@omgmotorworks.com

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        aw damn. it does indeed sound like a valve issue. i guess it doesn't mean that you bent a valve, but its possible. you might simply have a clearance issue. you my try loosening the cam journals to relieve the pressure off your valves, then do another compression test to see if that helps.

        its also possible that during assembly, some microscopic part fell down the intake and is wedged in between the valve and the head. its also possible that one of the spacers between the cam and the valve is stuck.

        if you do pull the cams back off, run the number 4 cylinder to bdc and tap on the top of the valves with a mallet. you should be able to feel if one is stuck.
        Last edited by flyboyx; 12-07-2016, 02:25 PM.
        sigpic
        Gigitty Gigitty!!!!

        88 cabrio becoming alpina b6 3.5s transplanted s62
        92 Mtech 2 cabrio alpinweiss 770 code
        88 325ix coupe manual lachsilber/cardinal
        88 325ix coupe manual diamondschwartz/natur
        87 e30 m3 for parts lachsilber/cardinal(serial number 7)
        12 135i M sport cabrio grey/black

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          Update: I ended up checking the valve lash, and found the culprit.

          Exhaust valves on #4 had 5x the lash as the rest of them - obviously they aren't closing fully. I suspect they are bent, so I ordered new ones and will be pulling the head off shortly to replace them. I have the OEM headgasket and other associated gaskets on order.

          It's a bummer, but in the long run I'll be happy I have a new headgasket on the S14 as I've run her for 6+ years and have no idea when it was last done.
          Last edited by IronJoe; 07-15-2019, 11:04 AM.
          '89 Schwarz E30 M3 Cabriolet Build

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            It's really a bad sign when your head gasket kit arrives like this:






            The perfect curvature for a head gasket -_-





            More waiting. :(
            '89 Schwarz E30 M3 Cabriolet Build

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              What HG Kit did you get?
              1989 Zinnoberrot M3 Build Thread
              1990 Brilliantrot 325iS Build Thread

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                Originally posted by IronJoe View Post
                It's really a bad sign when your head gasket kit arrives like this:
                Its hard to be at your house and NOT a little erect
                Simon
                Current Cars:
                -1986 BMW 325e & 1968 Datsun Roadster 2000
                Previous Car Count : 21 ... and climbing...
                Originally posted by Melon
                Let it be known to all. Simon fucking keeps it real.

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                  Love this build. Keep at it.


                  Sent from my iPhone using Tapatalk

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                    Lol, it looks like it was run over.
                    AWD > RWD

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                      Oh crap, not good on that HG.
                      sigpic

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                        Originally posted by AWDBOB View Post
                        What HG Kit did you get?
                        Goetze. According to a few folks on S14 it's a reasonable replacement for the Genuine BMW gasket which has been on national backorder. No way in hell I was going to put a Victor Reinz hg on this car.


                        Originally posted by 2mAn View Post
                        Its hard to be at your house and NOT a little erect
                        Good point. Probably shouldn't blame UPS for this one ;)
                        '89 Schwarz E30 M3 Cabriolet Build

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                          How anybody packages a gasket like that then assumes it will arrive without any damage is beyond me. That sucks!!
                          clutchCTRL!
                          Move with a purpose.
                          - 1991 325iX 4dr/5spd
                          - 1976 2002 SlickTop/2.7i M20/G260
                          - 2000 323i AT
                          2016 Mazda CX3 Sport AWD

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                            Sucks about the headgasket. I can't wait to see the car finished.
                            1993 BMW 850ci factory 6 speed
                            1992 Honda Civic Hatch, built B16, turbo, and nitrous
                            1989 BMW 325i, f20c swap
                            1989 Honda CRX, built LS/vtec, turbo, and nitrous

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                              Originally posted by IronJoe View Post
                              Goetze. According to a few folks on S14 it's a reasonable replacement for the Genuine BMW gasket which has been on national backorder. No way in hell I was going to put a Victor Reinz hg on this car.
                              Awesome, thanks! I've been dealing with that same internal battle with the Goetze sitting in my 'cart,' knowing there is no way I'd put a VR on the car.
                              1989 Zinnoberrot M3 Build Thread
                              1990 Brilliantrot 325iS Build Thread

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                                Originally posted by UNHCLL View Post
                                Your dealer is doing something "right" to be able to make that work - but I suspect they'll get their hands slapped by corporate at some point. Take advantage while you can, and don't publicize their name. ;)
                                This exact thing happened to my dealer! I was ordering euro parts long after I saw people being denied on here from other areas of the country, then one day my dealer was shut off too :(
                                My E30 v1.0 | v2.0 | v3.0 | My E28 |My E34 | My feedback

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