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Base gasket #^%$##

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    Base gasket #^%$##

    This ones glued on or something. Bikes a 77 gs750. Ive checked, triple checked for any bolts i may have missed, tried getting a putty knife in between cases and the block.....and its not coming loose. Suggestions. Ways to set up something to maybe spread the block from the cases? Any photos of your homemade tools would be great. Thanks.
    MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

    NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

    #2
    Maybe the pins need some penetrating oil? Can you squirt it down a stud channel?
    Ice the cylinders and heat the case?
    1982 GS1100G- road bike
    1990 GSX750F-(1127cc '92 GSXR engine)
    1987 Honda CBR600F Hurricane

    Comment


      #3
      Penetrating oil down the stud holes sound like a good suggestion.
      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


        #4
        Run cord between the cylinders, take the weight and wait.
        97 R1100R
        Previous
        80 GS850G, 79 Z400B, 85 R100RT, 80 Z650D, 76 CB200

        Comment


          #5
          I put PB BLASTER heavily down stud holes before closing down last night. I also made some aluminum wedges and will try tapping those in to see if I can get the seal broke
          MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
          1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

          NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


          I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

          Comment


            #6
            Mine was tough too, I tapped front and back lightly with a deadblow hammer and worked it free that way.

            Comment


              #7
              I'm not gonna be doing any smacking on the fins. Customers bike and a broke fin costs ME....
              MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
              1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

              NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


              I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

              Comment


                #8
                There's a flat spot on the crankcase and a matching one on the cylinder block at each end, find a 6mm bolt or cut one to length and put a nut on it put it on the flat spot and unwind the nut it will break the gasket free and the rest is easy, move it to the other side if necessary, but I've never needed to. I think it's even in the manual or there's a tool that does what i describe. Here:

                P1010487.JPG

                But a nut and bolt work every bit as well if you put it on the flat of case where the engine bolt hole is and simply unwind it.
                Last edited by tatu; 09-04-2020, 05:09 PM.
                sigpic

                Don't say can't, as anything is possible with time and effort, but, if you don't have time things get tougher and require more effort.

                Comment


                  #9
                  FYI the factory tool...

                  P1010486.JPG
                  sigpic

                  Don't say can't, as anything is possible with time and effort, but, if you don't have time things get tougher and require more effort.

                  Comment


                    #10
                    Ive had some stubborn ones but this ones hands down the winner. Heck i can make that tool easy enough.
                    MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                    NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                    Comment


                      #11
                      Got it off. The studs werent very dirty at all but tgere was some brown dope on the gasket. Think it was some Indian Head gasket glue. What a friggin mess cleaning it off too. Tomorrow starts the top end rebuild.
                      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                      Comment


                        #12
                        Originally posted by chuck hahn View Post
                        Got it off. The studs werent very dirty at all but tgere was some brown dope on the gasket. Think it was some Indian Head gasket glue. What a friggin mess cleaning it off too. Tomorrow starts the top end rebuild.
                        LOL. What was it then? Holy Water, a lump hammer or something in between
                        97 R1100R
                        Previous
                        80 GS850G, 79 Z400B, 85 R100RT, 80 Z650D, 76 CB200

                        Comment


                          #13
                          Got wedges started in all 4 corners and systematically tapped them in..basically pryed it up till it tore the gasket loose.
                          MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                          1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                          NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                          I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                          Comment


                            #14
                            So it was glued together. That's fine if you only intend to do a head and valve job.
                            I like you're making aluminum wedges just for this project. Way above the imagination of the average mechanic.
                            1982 GS1100G- road bike
                            1990 GSX750F-(1127cc '92 GSXR engine)
                            1987 Honda CBR600F Hurricane

                            Comment


                              #15
                              Well Bill, the thinness of a 1/8 thick aluminum wedgewill one of two things. Either wrinkle and fold up right from the get go or work itself in. they peeled a little going in but supplied enough opposing force to get the gasket torn. And i mean it literally shredded with chunk stuck on the cases and the jugs. Stuffed rags around all the con rods and a good sharp chisel did the rest.
                              MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                              1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                              NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                              I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                              Comment

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