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DT125R FORUM

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  4. Coolant going to the expansion bottle

Coolant going to the expansion bottle

Scheduled Pinned Locked Moved Engine
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  • B Bananper

    @Calum https://youtu.be/MoESLzTLdd8
    I put pressure on it and it just leaked out water and air

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #7

    @Bananper Which end did you apply pressure. Obviously it protects from the radiator to the overflow, the other way around. Otherwise how would the water make its way back into the engine.

    Always Originate, Never Pirate!

    B 2 Replies Last reply
    0
    • CalumC Calum

      @Bananper Which end did you apply pressure. Obviously it protects from the radiator to the overflow, the other way around. Otherwise how would the water make its way back into the engine.

      B Offline
      B Offline
      Bananper
      wrote on last edited by Bananper
      #8

      @Calum applied it on the thing close to the radiator cap, where the line to the expansion bottle goes

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      • CalumC Calum

        @Bananper Which end did you apply pressure. Obviously it protects from the radiator to the overflow, the other way around. Otherwise how would the water make its way back into the engine.

        B Offline
        B Offline
        Bananper
        wrote on last edited by
        #9

        @Calum used this method https://youtu.be/QVQqqjkXjnA

        CalumC 2 Replies Last reply
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        • B Bananper

          @Calum used this method https://youtu.be/QVQqqjkXjnA

          CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by
          #10

          @Bananper Fair, I wouldn't have thought that would work.

          Well, looks like it's the radiator cap then.

          Always Originate, Never Pirate!

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          • B Bananper

            @Calum used this method https://youtu.be/QVQqqjkXjnA

            CalumC Offline
            CalumC Offline
            Calum
            wrote on last edited by
            #11

            @Bananper Besides, the spring preload isn't in that direction, It's in the opposite direction.

            I don't know anything really about it, other than, when they go it will cause premature water to overflow.

            Always Originate, Never Pirate!

            B 1 Reply Last reply
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            • CalumC Calum

              @Bananper Besides, the spring preload isn't in that direction, It's in the opposite direction.

              I don't know anything really about it, other than, when they go it will cause premature water to overflow.

              B Offline
              B Offline
              Bananper
              wrote on last edited by
              #12

              @Calum so it could be a gasket issue?

              CalumC 1 Reply Last reply
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              • B Bananper

                @Calum so it could be a gasket issue?

                CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #13

                @Bananper Go path of least resistance. I'd be inclined to change the radiator cap first, and then the head gasket.

                Always Originate, Never Pirate!

                B 1 Reply Last reply
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                • Glynn123G Offline
                  Glynn123G Offline
                  Glynn123
                  wrote on last edited by
                  #14

                  If you change the head gasket, skim your cylinder head cause it's likely warped.
                  This can be done easily at home, get a glass chopping board and put some 1000 grit sandpaper on it, rub the head around it in a figure of 8 motion. If the heads really bad I usually use a oil stone first. Repeat while adding water to the wet and dry paper until whole head surface is even and shiny. Torque the head down, run the bike up to temperature, and then torque it down once again.

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                  • CalumC Calum

                    @Bananper Go path of least resistance. I'd be inclined to change the radiator cap first, and then the head gasket.

                    B Offline
                    B Offline
                    Bananper
                    wrote on last edited by Bananper
                    #15

                    @Calum ordered brand new radiator cap, but i have to wait for at least a week. Would it work to plug the line to the overflow so it does not fill up the bottle, just as a temporary fix?
                    Or will this cause big problems?

                    CalumC 1 Reply Last reply
                    0
                    • B Bananper

                      @Calum ordered brand new radiator cap, but i have to wait for at least a week. Would it work to plug the line to the overflow so it does not fill up the bottle, just as a temporary fix?
                      Or will this cause big problems?

                      CalumC Offline
                      CalumC Offline
                      Calum
                      wrote on last edited by
                      #16

                      @Bananper i wouldn't

                      Always Originate, Never Pirate!

                      1 Reply Last reply
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                      • Glynn123G Offline
                        Glynn123G Offline
                        Glynn123
                        wrote on last edited by
                        #17

                        Pick up a cap from the Scrappy, any car one with the same pressure will work aslong as it has the old style rad cap. You'll pay Penny's for it.

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