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1979 GS1000 Oil control problem

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    #16
    Thanks Ed. Engine supposedly has 33,000 miles. I bought it used and installed it into my 79 Gs1000 as a replacement engine. Started using oil a little at time of installation and increased usage last couple months. My plan is to have the head disassembled cleaned and repaired as necessary. Leaving the cylinders alone.

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      #17
      The experience of many members is to take off the cylinders and replace the base gasket and oil O rings, as taking the head off disturbs their ability to seal.
      It gives you something to do while you wait for your head to come back from the shop
      1978 GS 1000 (since new)
      1979 GS 1000 (The Fridge, superbike replica project)
      1978 GS 1000 (parts)
      1981 GS 850 (anyone want a project?)
      1981 GPZ 550 (backroad screamer)
      1970 450 Mk IIID (THUMP!)
      2007 DRz 400S
      1999 ATK 490ES
      1994 DR 350SES

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        #18
        For the price of a new base gasket and orings it would be a shame not to replace them.
        Like Ed and Big T said, the probability of the old base gasket leaking
        is very high.

        OEM gaskets are your best bet for succes.
        Rijk

        Top 10 Newbie Mistakes thread

        CV Carb rebuild tutorial
        VM Carb rebuild tutorial
        Bikecliff's website
        The Stator Papers

        "The thing about freedom - it's never free"

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          #19
          I saved the old engine that I removed as a parts engine, and will practice installing the cylinders on that as I break it down. Honestly I am intimidated by getting the cylinders over pistons as a solo project. A look at head and the cylinders from the old engine is educational. Note how smooth the bore showing almost no cross hatch, and the head combustion chamber has a lot less carbon than the head that is being rebuilt cue to oil control problems.

          1.jpg

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            #20
            2.jpg
            Clean chambers showing no oil issues even though the cylinders seem glazed

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              #21
              Fresh from the machine shop
              58B93078-D3BD-4089-A46E-59E83A758B42.jpg

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                #22
                Clean and ready to go back on
                60EE7E14-AFBF-4679-9FB1-50D18EB0217F.jpg

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                  #23
                  What gaskets did you buy? OEM is best, but pricy. You can often find good deals on eBay though. Whatever you do don't use Athena. They are evil.
                  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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                    #24
                    Wiseco head and valve cover gaskets.

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                      #25
                      More specifically
                      Wiseco W2711 for the head gasket. Cannot find part# for the valve cover, however it is the thicker more expensive option on dime city cycles.

                      79443D6F-6D53-42A7-98D6-03F6EFE0C532.jpg

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                        #26
                        Correct on stem seals. Both had basically disintegrated corresponding to the two cylinders where oil had coated the valves and gotten on spark plug threads.

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