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Thread: 197X Mazda 929 heater hose routing

  1. #1
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    197X Mazda 929 heater hose routing

    Here's my problem:

    1974 Mazda 929.

    Water pump has a screw in fitting on top of it.

    the inlet manifold has the same type of fitting screwed into the side facing the firewall.

    at the back of the inlet manifold there is a t-piece fitting that is near the strut tower.
    The side of this T fitting that runs towards the radiator has a hose that goes to the fitting on top of the water pump.

    I just need to know which heater matrix hose goes to what fitting on the inlet manifold. ie does the top heater hose from the matrix go to the T piece or does it go to the screw in fitting?

  2. #2
    Junior Member
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    Re: 197X Mazda 929 heater hose routing

    Quote Originally Posted by ewokracing
    The side of this T fitting that runs towards the radiator has a hose that goes to the fitting on top of the water pump.
    that is correct

    Quote Originally Posted by ewokracing
    The side of this T fitting that runs towards the radiator has a hose that goes to the fitting on top of the water pump.

    I just need to know which heater matrix hose goes to what fitting on the inlet manifold. ie does the top heater hose from the matrix go to the T piece or does it go to the screw in fitting?
    T piece goes to top (where the valve should be on the matrix)

  3. #3
    Senior Member
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    ah ha. thanks for that. I'm pretty sure there is no tap (ie to turn off the coolant flow through the heater core) but I'll have a closer look tomorrow.

    Cheers

    edit: just clued on, one of the controls on the dash open and closes a valve on the top pipe I think.

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