G-8VXWWTRHPN Heater bypass valve - VWWatercooled Australia

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Heater bypass valve

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  • Heater bypass valve

    Any one know if our Australia released Mk2 Golf has heater bypass valve ?

    I'm still trying to trace down why my heater has no hot air, read some thread in oversea Golf forum, one possibility is heater bypass valve playing up. But I can not see any valve in my Golf heater in/out pipes.
    sigpic

  • #2
    They don't have one. These are only on Golf 1s.

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    • #3
      More likely to be gunked up heater matrix. Common flaw, and factory recall in the Mk2... What year???
      Euro look 2... Mk2 love!

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      • #4
        It is 90 built, 91 registered. I don't know if it has been covered by the recall. The heater stopped working after I flushed the coolant with running tap water through the expansion tank. I'll try disconnect the in/out hose this w/e and see if water can flow through the matrix.
        sigpic

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        • #5
          Originally posted by mrgolf
          More likely to be gunked up heater matrix. Common flaw, and factory recall in the Mk2... What year???
          The factory recall was to protect against leaks burning the driver's legs.

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          • #6
            The coolant flows through the matrix continuously in the Mk11. That is, if it were blocked then you would have a serious overheating in the engine, not only in the heater. The heater cores are starting to fail from age but if that goes, you get coolant in the car, steam inside your windows and, again, engine overheating from loss of coolant.

            If your engine isn't overheating then its possible its running cold - thermostat stuck wide open? Otherwise, its almost certainly got to be a problem in the heater unit itself, fan, flaps, vacuume ... that sort of area.

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            • #7
              Thanks, Moto

              Thermostat was replaced 6 months ago, unlikely it is bad.
              No overheat problem
              No coolant in the car
              No steam inside the window

              Probably need to pull the dash out to check the heater box
              sigpic

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              • #8
                I reckon it will be the flap controlled by the cable, that is not letting hot air into the car. Check your sliding heater switches and then up under the dash to see if the heater flap is being opened.
                sigpic Camden GTI Performance. VW / AUDI Specialists
                All Mechanical Work, Log book Servicing, New and used Parts and Imports
                19-20/6 Badgally Road, Campbelltown, 2560
                02 4627 3072 or 0423 051737 www.camdengti.com

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                • #9
                  Originally posted by moto
                  The coolant flows through the matrix continuously in the Mk11. That is, if it were blocked then you would have a serious overheating in the engine, not only in the heater.

                  Oh yeah, forgot that bit...
                  Euro look 2... Mk2 love!

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                  • #10
                    Originally posted by Golf Loon
                    I reckon it will be the flap controlled by the cable, that is not letting hot air into the car. Check your sliding heater switches and then up under the dash to see if the heater flap is being opened.
                    That's what it sounds like to me.

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