post-valve adjustment question

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  • mkcman17
    R3V OG
    • Jul 2010
    • 8240

    #1

    post-valve adjustment question

    did a valve adjustment yesterday, and i'm afraid that i may have done them too tight. i measured them with considerable drag to .010 on a not-completely-cold motor that had been sitting for a couple hours. am i aight? don't want to be burning any valves.
    1989 325is / 2.7, 274 cam, e30 M3 5-lug
    1989 LN106 Hilux / 3.0TD SFA
    1974 2002tii / stock
    2002 IS300 / 5spd LSD
  • jlevie
    R3V OG
    • Nov 2006
    • 13530

    #2
    If the head temperature was below 100F, you should be okay.

    On a race engine with known good valve guides I set the intakes to .006 and the exhausts to .008 (stone cold). I won't use clearances that tight on a higher mileage head that has worn guides, but it does give you some idea of how far you can go a still not burn exhaust valves.

    The best, and easiest/quickest, way to adjust valves is to invest in a spring tool for the eccentrics. That removes an subjective qualities from setting valve clearance. BavAuto is one source for the tool.
    The car makes it possible, but the driver makes it happen.
    Jim Levie, Huntsville, AL

    Comment

    • mkcman17
      R3V OG
      • Jul 2010
      • 8240

      #3
      thanks for the info! any more you can tell me about the tool?
      1989 325is / 2.7, 274 cam, e30 M3 5-lug
      1989 LN106 Hilux / 3.0TD SFA
      1974 2002tii / stock
      2002 IS300 / 5spd LSD

      Comment

      • Avus E30
        No R3VLimiter
        • Feb 2005
        • 3650

        #4
        I looked at it on pelican and it looks to me to be essentially the a spring to make the tension on the "allen" the same. with an allen on two ends of a spring.
        http://www.pelicanparts.com/cgi-bin/...ment%2C%20Each
        HDE30 <3

        Comment

        • mkcman17
          R3V OG
          • Jul 2010
          • 8240

          #5
          i see...i'm guessing we're looking at this:

          http://www.pelicanparts.com/cgi-bin/...,%20Each%20%20

          so the spring offers the proper amount of torque?
          1989 325is / 2.7, 274 cam, e30 M3 5-lug
          1989 LN106 Hilux / 3.0TD SFA
          1974 2002tii / stock
          2002 IS300 / 5spd LSD

          Comment

          • Avus E30
            No R3VLimiter
            • Feb 2005
            • 3650

            #6
            thats what it appears like to me. I imagine someone may chime in to confirm
            HDE30 <3

            Comment

            • lennon
              E30 Fanatic
              • Jun 2008
              • 1416

              #7
              you guys have got it about the tool. not too necessary but definitely makes it easier. i set them to .008 and .010 usually. if in doubt, go towards the loose side, especially on the exhaust. i would let it cool longer than that. is that .010 on both, intake or exhaust?

              Comment

              • mkcman17
                R3V OG
                • Jul 2010
                • 8240

                #8
                Originally posted by lennon
                you guys have got it about the tool. not too necessary but definitely makes it easier. i set them to .008 and .010 usually. if in doubt, go towards the loose side, especially on the exhaust. i would let it cool longer than that. is that .010 on both, intake or exhaust?
                yeah it was cooled probably 2 hours, and the engine was definitely not 'cold.' i set them to a tight .010 at that temp. valves are pretty quiet, but i'm thinking i should re-adjust them again completely cold?
                1989 325is / 2.7, 274 cam, e30 M3 5-lug
                1989 LN106 Hilux / 3.0TD SFA
                1974 2002tii / stock
                2002 IS300 / 5spd LSD

                Comment

                • lennon
                  E30 Fanatic
                  • Jun 2008
                  • 1416

                  #9
                  Originally posted by mkcman17
                  yeah it was cooled probably 2 hours, and the engine was definitely not 'cold.' i set them to a tight .010 at that temp. valves are pretty quiet, but i'm thinking i should re-adjust them again completely cold?
                  i would. just so you know. it's not too hard to get the valve cover back off. i like to let it cool like 8 hours, overnight or something.

                  Comment

                  • nando
                    Moderator
                    • Nov 2003
                    • 34827

                    #10
                    I would just check it with the engine cold, you don't have to readjust everything. just make sure the exhausts aren't too tight.
                    Build thread

                    Bimmerlabs

                    Comment

                    • slammin.e28
                      שמע ישראל
                      • May 2010
                      • 12054

                      #11
                      Originally posted by lennon
                      overnight
                      I've been known to get up before work and adjust them in the morning....but that's just me.
                      1974.5 Jensen Healey : 2003 330i/5

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