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M3 head retorque spec ?

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    M3 head retorque spec ?

    Iím ready to install my cyl head this weekend, 88í M3 ,stock 2.3 . I had a pie shaped burn on(1) #1 cyl ,that I replaced . Iíve got the torque angle tool & have done this awhile back on another product. Canít find torques or how to on utube, any go to sites or info on this install ? Thanks

    #2
    [ATTACH]117657[/ATTACH]
    john@m20guru.com
    Links:
    Transaction feedback: Here, here and here. Thanks :D

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      #3
      M3 torque spects

      Thank you for that I that info. What is torque ## for those Allen cam tower bolts , angle torque as well ? Where Is all this info w/pics on M3 at ? Thanks ,Joe

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        #4
        M3 head torque spects

        That pic of the head & torque , was it in the factory shop Manual ? I had that ringed book about 10 years ago ! What was I thinking to have sold it

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          #5
          I have complied tons of data on them over the last decade or so. I have a small independent shop that ~90% of the clientele is e30.

          Didn't find anything specific on the cam bolts, it just references the generic BMW TQ values based on thread diameter and length.
          john@m20guru.com
          Links:
          Transaction feedback: Here, here and here. Thanks :D

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            #6
            Cam tower Allen bolts

            No numbers from them ? Breaking it down it felt like 30-35lbs . Are these angle torqued too , does not seem high enough What ## do you use on an assembled motor . Still donít know why I sold my shop manual ? Thanks again for you help

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              #7
              For bolting the cam tray to the head

              7mm bolts, 15 Nm (11 ft lbs.)
              8mm nuts, 21 Nm (15 ft lbs.)

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                #8
                Hi
                50nm,80nm and then wait for 15 minutes and final torque to 100nm, does not require retorting after engine run.

                Kindly supplied buy top guy Pierre.
                http://m3guru.bmwe30m3.net/wp-conten...ine_img_52.jpg

                http://m3guru.bmwe30m3.net
                Last edited by NZM3; 11-02-2017, 12:56 AM.

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                  #9
                  S14 head toques

                  Thanks guys for the info !

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                    #10
                    Originally posted by NZM3 View Post
                    does not require retorting after engine run.
                    I always double check head bolts that are not TTY after a few heat cycles. TTY bolts that stretch keep the head pulled in as the gasket compresses. A bolt that goes to a TQ value only will lose clamping force as the gasket compresses.
                    john@m20guru.com
                    Links:
                    Transaction feedback: Here, here and here. Thanks :D

                    Comment


                      #11
                      thanks guy for great infomation

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                        #12
                        Originally posted by ForcedFirebird View Post
                        I always double check head bolts that are not TTY after a few heat cycles. TTY bolts that stretch keep the head pulled in as the gasket compresses. A bolt that goes to a TQ value only will lose clamping force as the gasket compresses.

                        Yes I am due to do that on my S14. But not like most engines incl the M20, to retorque the head bolts the camtray needs to come off. Not a 5 min job....

                        Im running ARP studs and retorqued mine after waiting overnight, however I woud like to redo them now the engine has run and got hot... almost 1000kms.
                        Pulling my hair out with all these friggin BMW's:
                        2000 M5 Winter beater
                        1984 318i Coupe 2.5 S14 going in the car below.
                        1988 M3 Lachssilber: I'm the second owner, currently recommissioning.

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