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    sealing exhaust manifold to heads

    Hi just a quick question does anyone seal the gaskets between the heads and exhaust manifolds? And if so what do you use?

    On other vehicle builds I’ve just used a smear of grease.

    Thanks

    Mark

    #2
    No gaskets from the factory. but folks are making them. I had the faces of my exhaust manifolds belt sanded by my machine shop. A thing to consider, they act as a heat sync and I suppose help draw heat away from the block. Adding gaskets can prevent that.
    Sujit

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      #3
      They are TR7 gaskets.
      ​​​​The 2 Litre TR7 didn't have issues drawing heat from the block, so why would a 1500 stag head.

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        #4
        The first time I did my heads I didn’t use exhaust gaskets and the manifold joints leaked. The second time I did my heads (40,000 miles later) I used gaskets and they’ve been good since…..
        Richard
        Mabel is a white ‘72 Mk2, TV8, ZF 4HP-22 auto.

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          #5
          I did wonder because when I took them off there were no gaskets.

          So heat transfer my be a small risk but leaks are not good either.

          What a dilemma. Not sure what to do now.

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            #6
            So if I use the they go on with a smear of grease

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              #7

              gaskets blew out of mine within 500 miles

              20150617_194452.jpg

              just exhaust paste had been in for over 3000miles now

              Factory didn't fit gaskets for a reason I guess
              Stags and Range Rover Classics - I must be a loony

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                #8
                I have never used exhaust manifold gaskets on any Stag engine I have fitted in over 20+ years. Just assembly paste, and never any problems.
                Mike.

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                  #9
                  The gaskets were supplied because people asked for them. (Not original fitment) No gasket used at this joint.
                  Mostly it seems they are made from a material that relaxes & causes leaks once the clamp load is lost.
                  Last edited by jbuckl; 24 July 2021, 01:23.
                  There are 2 secrets to staying on top :- 1. Don't give everything away.
                  2.

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                    #10
                    I used gaskets when I fitted stainless manifolds. The heads were off to do the head gaskets. One blew after a couple of thousand miles. It would be the RH side, which is a real PITA to change in situ. So far, this one has lasted much longer….
                    Dave
                    1974 Mk2, ZF Auto, 3.45 Diff, Datsun Driveshafts. Stag owner/maintainer since 1989.

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