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  • Spark Plugs

    Got myself some NGK Iridium plugs and was wondering how much of a turn people recommend once they are finger tight when fitting.

    The little picture on the box of each plug suggests 1/2 to 2/3 of a turn but, assuming the block is aluminium, this seems a little excessive?

    I'm obviously concerned about overtightening and stripping the thread in the block but notice the plugs have a crush washer so 1/2 to 2/3 of a turn would seem to make sense ...

    Any thoughts (especially from those who fit these regularly :wink: )

    Cheers

    Andy

  • #2
    TIS says to tighten to 25Nm, not sure what that is in turns though

    Comment


    • #3
      Originally posted by cwvxr
      TIS says to tighten to 25Nm, not sure what that is in turns though
      I would go with the 25nm and make sure she cold.

      www.courtenaysport.co.uk/ For all your tuning needs

      Comment


      • #4
        Originally posted by vxrdave
        Originally posted by cwvxr
        TIS says to tighten to 25Nm, not sure what that is in turns though
        I would go with the 25nm and make sure she cold.
        Yep, was thinking along these lines myself.

        Changed my own plugs for years now and a 1/4 turn was always sufficient - tightening any further than this and I would get nervous unless using a torque figure which is what I will use given the above info.

        Thanks very much guys.

        Andy

        Comment


        • #5
          Originally posted by VXRNUTTER
          Originally posted by vxrdave
          Originally posted by cwvxr
          TIS says to tighten to 25Nm, not sure what that is in turns though
          I would go with the 25nm and make sure she cold.
          Yep, was thinking along these lines myself.

          Changed my own plugs for years now and a 1/4 turn was always sufficient - tightening any further than this and I would get nervous unless using a torque figure which is what I will use given the above info.

          Thanks very much guys.

          Andy
          yep no what you mean i just change the pluge in the vectra st V6 just turned till it felt wright if you no what i mean but if you have a torque figure you may as well use it as long as you have torque wrench.

          www.courtenaysport.co.uk/ For all your tuning needs

          Comment


          • #6
            Originally posted by VXRNUTTER
            Originally posted by vxrdave
            Originally posted by cwvxr
            TIS says to tighten to 25Nm, not sure what that is in turns though
            I would go with the 25nm and make sure she cold.
            Yep, was thinking along these lines myself.

            Changed my own plugs for years now and a 1/4 turn was always sufficient - tightening any further than this and I would get nervous unless using a torque figure which is what I will use given the above info.

            Thanks very much guys.

            Andy
            You've probably already changed them by now, but I normally put some copper grease (anti-seize) on the new plugs' threads just to avoid any nasty surprises trying to get them out next time :wink:
            sigpic

            Comment


            • #7
              Originally posted by BLACKVXR
              Originally posted by VXRNUTTER
              Originally posted by vxrdave
              Originally posted by cwvxr
              TIS says to tighten to 25Nm, not sure what that is in turns though
              I would go with the 25nm and make sure she cold.
              Yep, was thinking along these lines myself.

              Changed my own plugs for years now and a 1/4 turn was always sufficient - tightening any further than this and I would get nervous unless using a torque figure which is what I will use given the above info.

              Thanks very much guys.

              Andy
              You've probably already changed them by now, but I normally put some copper grease (anti-seize) on the new plugs' threads just to avoid any nasty surprises trying to get them out next time :wink:
              Great tip!

              Comment

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