Announcement

Collapse
No announcement yet.

Please critique these 83-86 cylinder head removal pics

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Please critique these 83-86 cylinder head removal pics

    So I got this engine that had no compression on 2 and 3
    normal compression on 1 and diminished compression on 2

    I got me a replacement motor and it has 140 across the board so I am in the process of swapping.

    I had to open the old one up and as they say on Mythbusters "Well there's your problem!"

    #2
    I'm very surprised that bike ran for long enough to cause that damage on all those cylinders. It must have run like a dog for a good while.
    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


      #3
      Yep, horror story. Nothing a drop of Seafoam won't sort though....
      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


        #4
        Originally posted by hampshirehog View Post
        I'm very surprised that bike ran for long enough to cause that damage on all those cylinders. It must have run like a dog for a good while.
        Yeah it ran poorly but I really had no idea how bad until the compression faded quickly.

        Two exhaust valves broken
        One intake valve bent on cylinder 2

        It looks like the sleeves are distorted or coming free from the block.
        The cylinder walls have no scoring that I can see or feel.

        My redneck use of gas to check for any outrageous leaks by the rings lasted longer that I was willing to wait.

        The piston crowns look washed from gas. Can hydro-locking cause a valve to chip off like that?

        I was regretting getting the parts bike as I was thinking it was a simple head gasket issue. The valves and headgasket alone would pay for a huge chunk of my parts bike.

        Is the head gasket blown? I have photos of the top and botton and it looks like it died on the bottom.

        Comment


          #5
          Jeep

          Another engine flogged to death (bulletproof!)


          Can you use the IMG code to make your pictures come out larger?
          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

          Comment


            #6









            Last edited by Guest; 03-30-2012, 07:47 PM.

            Comment


              #7









              Comment


                #8





                Comment


                  #9
                  So none of you 80 plus people care to offer advice or guidance?
                  Thanks for the help...................

                  Comment


                    #10
                    Did the bike have pods and/or a header? Lean mixture in addition to neglected valve adjustments equals burned/split 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


                      #11
                      It's not hydro locking damage, I see two broken valves and a severe oil fouled cylinder...
                      The valves don't look burnt.
                      What was going on when it failed?
                      http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                      Life is too short to ride an L.

                      Comment


                        #12
                        Thanks guys............

                        I do know the carb boot o-rings had to be replaced. That fixed the idle fluctuations but perhaps it was the right measure far too late?

                        The bike was flogged hard. Could this have been form a valve float?

                        I also thought Suzuki gaskets were multi layer metal this one is a .5 - 1 mm solid sheet.


                        It ran really well last spring and I then had to get o-rings for the carbs because I dumped a tank of gas into the crank.

                        I have a spare and nothing to lose but I would like to at least practice some skills on this motor in anticipation of a time when no spare may readily exist.

                        Comment


                          #13
                          Oh the oil fouling is gas actually
                          I did the CC leak test for a laugh.

                          Comment


                            #14
                            I have not seen valves broken like this, but burnt ones usually have a Vee shape burned away from one edge, not at all like these.
                            Is there any corresponding damage in the pistons from valve contact?
                            Doesn't look like it but can't really see from the pics...
                            http://img.photobucket.com/albums/v5...tatesMap-1.jpg

                            Life is too short to ride an L.

                            Comment


                              #15
                              I can so mo impact marks on the pistons
                              I will look closer in the morning though.

                              Comment

                              Working...
                              X