Leaky Head 650E

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  • GS650E_81
    • Feb 2026

    #1

    Leaky Head 650E

    There seems to be a little oil seeping from the head gasket. I can't tell how much as the PO used some type of black sealant, but it may be leaking a little.

    The gasket is clearly visible and looks okay. Not sure if the PO used the right amount of torque or not...

    Is this a major deal? Or Can I try and torque the bolts more. I do not have a torque wrench though..

    Thanks.
  • Nessism
    Forum LongTimer
    GSResource Superstar
    Past Site Supporter
    Super Site Supporter
    • Mar 2006
    • 35790
    • Torrance, CA

    #2
    Torquing the head is a part of normal maintenance, as detailed in the Suzuki service manual, but once a head gasket starts to leak it's too late. You can try tightening it, but your probability for success is going to be low.
    Ed

    To measure is to know.

    Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

    Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

    Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

    KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

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    • GS650E_81

      #3
      Originally posted by Nessism
      Torquing the head is a part of normal maintenance, as detailed in the Suzuki service manual, but once a head gasket starts to leak it's too late. You can try tightening it, but your probability for success is going to be low.

      I will try and tighten it up. If I don't replace the gasket soon, will I just blow up?

      Comment

      • 7981GS

        #4
        Originally posted by GS650E_81
        I will try and tighten it up. If I don't replace the gasket soon, will I just blow up?
        I would first aquire a torque wrench to use to torque the bolts down.
        As for will YOU blow up, stranger things have happened around her.

        Eric

        Comment

        • hampshirehog
          Forum LongTimer
          Past Site Supporter
          • Oct 2007
          • 12675
          • Hampshire. UK

          #5
          Don't worry about your bike blowing up with just a leaky head gasket. You'll just get oil everywhere and need to top the engine up more frequently.
          79 GS1000S
          79 GS1000S (another one)
          80 GSX750
          80 GS550
          80 CB650 cafe racer
          75 PC50 - the one with OHV and pedals...
          75 TS100 - being ridden (suicidally) by my father

          Comment

          • GS650E_81

            #6
            Originally posted by hampshirehog
            Don't worry about your bike blowing up with just a leaky head gasket. You'll just get oil everywhere and need to top the engine up more frequently.
            I have yet to see a drop on the garage floor except for when I change the oil. So it doesn't seem that bad yet just a messy head. I still love her

            Comment

            • Nessism
              Forum LongTimer
              GSResource Superstar
              Past Site Supporter
              Super Site Supporter
              • Mar 2006
              • 35790
              • Torrance, CA

              #7
              Could it be a valve cover leak? What was the condition of the gasket when you last adjusted the valves?
              Ed

              To measure is to know.

              Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

              Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

              Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

              KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

              Comment

              • GS650E_81

                #8
                Originally posted by Nessism
                Could it be a valve cover leak? What was the condition of the gasket when you last adjusted the valves?
                It may be the valve cover. Its on the very top of the engine. I have not adjusted the valves the po may have

                Comment

                • Nessism
                  Forum LongTimer
                  GSResource Superstar
                  Past Site Supporter
                  Super Site Supporter
                  • Mar 2006
                  • 35790
                  • Torrance, CA

                  #9
                  Originally posted by GS650E_81
                  It may be the valve cover. Its on the very top of the engine. I have not adjusted the valves the po may have
                  Your path is clear then. Pull the valve cover and do the valves, then replace the valve cover with fresh. Please don't neglect critical maintenance like valve adjustments otherwise your engine will be damaged.
                  Ed

                  To measure is to know.

                  Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

                  Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

                  Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

                  KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

                  Comment

                  • GS650E_81

                    #10
                    Originally posted by Nessism
                    Your path is clear then. Pull the valve cover and do the valves, then replace the valve cover with fresh. Please don't neglect critical maintenance like valve adjustments otherwise your engine will be damaged.

                    Good call.

                    Comment

                    • SVSooke

                      #11
                      Don't put off checking them,I will admit to being a little gun shy about doing a valve adjust on my 78 1000 as I have never done shim and bucket before.Send Steve http://www.thegsresources.com/_forum/member.php?u=484 an email and get one of his handy spreadsheets.I was glad I did!I used this method http://members.dslextreme.com/users/...ol_zip_tie.pdf
                      to replace the needed shims.

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