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    Gasket Sealant: yes or no?

    I'm rebuilding the engine on my GS850. I bought a tube of gasket sealant for reassembly. However, the store clerk told me that it isn't necessary, and that he had been rebuilding engines without sealant and hadn't had any issues. Would you recommend using gasket sealant?
    1482771221219-958440614.jpg

    #2
    no sealant is needed
    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


      #3
      The answer depends on the application. Open up your factory Suzuki service manual and use that as your guide. The manual tells you were sealer is mandatory. On the crankcase halves for example and around certain stud threads. As far as applying gasket goop on top of gaskets, that's generally not necessary if you are using factory Suzuki gaskets (the best available). If you are cheaping out and purchasing aftermarket gaskets then the answer may not be so easy. The valve cover should not be gasket gooped on the head side for sure. The other gaskets should not be gooped if you ever plan to ever take them apart again, however a light skim coat on the base gasket and or oil pan isn't the worst thing in the world, particularly if someone scratches up the sealer surfaces during old gasket removal. Threebond 1184 is the modern standard sealer for crankcase halves. Gasketsinch or 1184 on critical gaskets.
      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
        Originally posted by Nessism View Post
        The answer depends on the application. Open up your factory Suzuki service manual and use that as your guide. The manual tells you were sealer is mandatory. On the crankcase halves for example and around certain stud threads. As far as applying gasket goop on top of gaskets, that's generally not necessary if you are using factory Suzuki gaskets (the best available). If you are cheaping out and purchasing aftermarket gaskets then the answer may not be so easy. The valve cover should not be gasket gooped on the head side for sure. The other gaskets should not be gooped if you ever plan to ever take them apart again, however a light skim coat on the base gasket and or oil pan isn't the worst thing in the world, particularly if someone scratches up the sealer surfaces during old gasket removal. Threebond 1184 is the modern standard sealer for crankcase halves. Gasketsinch or 1184 on critical gaskets.
        Exactly! It also works well to hold them in place if your working alone. Use VERY sparingly. I recently took apart one of my old GS's. I had used Yamaha brand gasket sealer, and under the gasket, which was not leaking, the sealant was not leaking, pliable and easy to remove. It was Yamaha's version and I believe it is Yamabond #4. Yamaha has very good chemicals.
        Last edited by limeex2; 12-26-2016, 07:15 PM.
        Current Rides: 82 GS1100E, 00 Triumph 955 Speed Triple, 03 Kawasaki ZRX1200, 01 Honda GL1800, '15 Kawasaki 1000 Versys
        Past Rides: 72 Honda SL-125, Kawasaki KE-175, 77 GS750 with total yosh stage 1 kit, 79 GS1000s, 80 GS1000S, 82 GS750e,82 GS1000S, 84 VF500f, 86 FZR600, 95 Triumph Sprint 900,96 Triumph Sprint, 97 Triumph Sprint, 01 Kawasaki ZRX1200, 07 Triumph Tiger 1050, 01 Yam YFZ250F
        Work in progress: 78 GS1000, unknown year GS1100ES

        Comment


          #5
          https://www.aircraftspruce.com/pages...ezturnlube.php

          EZ Turn is a specialty lubricant/sealant used for fuel and oil line valves & is resistant to high temps. Especially effective where high octane fuels and aromatics are present. EZ Turn is also extremely efficient as a gasket paste & anti- seize agent. EZ Turn will not gum, crack or dry out. Each shipment is independently tested. Excellent for tapered plug valves, aircraft engine manufacturing, and marine applications. EZ Turn is the functional equivalent of fuel lube. 1 Lb. can
          82 1100 EZ (red)

          "You co-opting words of KV only thickens the scent of your BS. A thief and a putter-on of airs most foul. " JEEPRUSTY

          Comment


            #6
            Originally posted by limeex2 View Post
            Exactly! works well to hold them in place if your working alone. Use VERY sparingly. I recently took apart one of my old GS's. I had used Yamaha brand gasket sealer, and under the gasket, which was not leaking, the sealant was still pliable. I believe Yamaha's version is Yamabond #4. Yamaha has very good chemicals
            What part number Threebond sealer corresponds to Yamabond #4? Yamaha does not make sealers, they just rebrand Threebond.
            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


              #7
              Not sure of p/n but #4 is for use with gaskets, #5 is for use with no gaskets. That's good to know, Yamaha stuff is probably more expensive?, and Threebond is probably more readily available.
              Current Rides: 82 GS1100E, 00 Triumph 955 Speed Triple, 03 Kawasaki ZRX1200, 01 Honda GL1800, '15 Kawasaki 1000 Versys
              Past Rides: 72 Honda SL-125, Kawasaki KE-175, 77 GS750 with total yosh stage 1 kit, 79 GS1000s, 80 GS1000S, 82 GS750e,82 GS1000S, 84 VF500f, 86 FZR600, 95 Triumph Sprint 900,96 Triumph Sprint, 97 Triumph Sprint, 01 Kawasaki ZRX1200, 07 Triumph Tiger 1050, 01 Yam YFZ250F
              Work in progress: 78 GS1000, unknown year GS1100ES

              Comment


                #8
                Originally posted by RedBolide View Post
                I'm rebuilding the engine on my GS850. I bought a tube of gasket sealant for reassembly. However, the store clerk told me that it isn't necessary, and that he had been rebuilding engines without sealant and hadn't had any issues. Would you recommend using gasket sealant?
                [ATTACH=CONFIG]49037[/ATTACH]
                I doubt very much the store guy has been rebuilding GS850 engines for years, or any GS engines, for that matter.
                The one area where every GS850 engine leaks (there are others, but not guaranteed) is around the left front on the base gasket, where there's a weird O-ring around an oil passage. It's a total pain in the arse to do a rebuild, with good quality gaskets and find the leak re-appears. It takes time, but it comes back. Every single GS 850 from the factory leaked there, if enough miles had passed.
                Bitter experience taught me to give the base gasket a smear of Hylomar top and bottom around that area.
                All the other leaks are generally nuisances, but can be easily fixed by removal / replacement of the offending part with a new gasket. The base gasket, head gasket, and case joint are special - you need to get them right on assembly.
                ---- Dave
                79 GS850N - Might be a trike soon.
                80 GS850T Single HIF38 S.U. SH775, Tow bar, Pantera II. Gnarly workhorse & daily driver.
                79 XS650SE - Pragmatic Ratter - goes better than a manky old twin should.
                92 XJ900F - Fairly Stock, for now.

                Only a dog knows why a motorcyclist sticks his head out of a car window

                Comment


                  #9
                  Originally posted by Grimly View Post
                  I doubt very much the store guy has been rebuilding GS850 engines for years, or any GS engines, for that matter.
                  The one area where every GS850 engine leaks (there are others, but not guaranteed) is around the left front on the base gasket, where there's a weird O-ring around an oil passage. It's a total pain in the arse to do a rebuild, with good quality gaskets and find the leak re-appears. It takes time, but it comes back. Every single GS 850 from the factory leaked there, if enough miles had passed.
                  Bitter experience taught me to give the base gasket a smear of Hylomar top and bottom around that area.
                  All the other leaks are generally nuisances, but can be easily fixed by removal / replacement of the offending part with a new gasket. The base gasket, head gasket, and case joint are special - you need to get them right on assembly.
                  The gasket area around that teardrop shaped O-ring is very thin. You can coat that thing with whatever you want and it's not going to do much if oil is going past that O-ring. Pretty sure those O-rings are on the rear studs though, not the front.

                  One thing that is listed in the manual but many GS guys don't ever do is torque the head. Even on the forum here we chatter about adjusting valves but never torquing the head.

                  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


                    #10
                    Brainfart on the position of the O-ring, but the certainty of the front left leak is a fact.
                    Another certainty, is that any one I've coated hasn't leaked.
                    ---- Dave
                    79 GS850N - Might be a trike soon.
                    80 GS850T Single HIF38 S.U. SH775, Tow bar, Pantera II. Gnarly workhorse & daily driver.
                    79 XS650SE - Pragmatic Ratter - goes better than a manky old twin should.
                    92 XJ900F - Fairly Stock, for now.

                    Only a dog knows why a motorcyclist sticks his head out of a car window

                    Comment


                      #11
                      Originally posted by Grimly View Post
                      I doubt very much the store guy has been rebuilding GS850 engines for years, or any GS engines, for that matter.
                      The one area where every GS850 engine leaks (there are others, but not guaranteed) is around the left front on the base gasket, where there's a weird O-ring around an oil passage. It's a total pain in the arse to do a rebuild, with good quality gaskets and find the leak re-appears. It takes time, but it comes back. Every single GS 850 from the factory leaked there, if enough miles had passed.
                      Bitter experience taught me to give the base gasket a smear of Hylomar top and bottom around that area.
                      All the other leaks are generally nuisances, but can be easily fixed by removal / replacement of the offending part with a new gasket. The base gasket, head gasket, and case joint are special - you need to get them right on assembly.
                      I'll be sure to do that then. Don't want any trouble later on. Thanks so much for the response (and all other responses for that matter). It's been super helpful!

                      Comment


                        #12
                        When ever I fit new gaskets I use Wellseal. http://www.wellseal.co.uk/
                        It's easy to apply using a small artists paint brush and less messy than most other silicon type sealers.
                        I should imagine that you can buy it in the USA if not its easy enough to find on eBay.

                        HTH

                        Jeff
                        Jeff

                        Living the dream...

                        1980 GS1000 that has been modestly modified.

                        Comment


                          #13
                          OK you are from the usa go to Napa and buy the aircraft grade gasket sealer. I use it all the time never have had an issue. Only use on paper gaskets it will seal the gasket and never will leak and if you tear down the gasket will release from the substrate and not tear and cleans off very easy with brake clean just spray and wipe only get the stuff from Napa best I've found yet. I'm pretty sure its made by permatex.

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