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Thread: vn s1 n s2 cooling system diagram

  1. #1
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    vn executive

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    Default vn s1 n s2 cooling system diagram

    need a cooling system diagram of v6 s1 and s2 engine
    which way the water flows through intake manifold and out of the timing cover
    the flow of the pipe that comes outa the timing cover that feeds the heaters
    and the flow of the pipe that comes out of the front of the manifold
    the two pipes end up being right next to each other under the power steering pump

    any help would be appreciated

  2. #2
    immortality's Avatar
    immortality is offline crappy ol' VN driver
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    VN3.8 5spd/VSII3.8/VH5.0

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    it's fairly simple really. cool water flows from the radiator into the waterpump. the water pump forces it through the engine block and up into the intake manifold to the thermostat housing. from the thermostat housing it goes back to the radiator to be cooled and start the process again. for the heater, the pipe coming from the intake manifold is the hot feed and the hose going into the timing cover feeds back to the waterpump (this creates the suction for flow). there is also a hose going directly from the intake manifold to the waterpump, this is a bypass that allows coolant to circulate when the thermostat is closed. (ecotecs don't have this). the heater hose from the manifold goes to the heater tap, then it goes into the cabin to the heater core, comes out back to the heater tap and then goes to the timing cover/waterpump. when you have the heater knob set to cold the heater tap closes and prevents hot coolant coming into the cabin and cycles it directly back to the timing cover/waterpump.

    on the s1 there are 3 lines going to the reservoir. 2 small lines. one coming from the intake manifold and one from the radiator. these are bleed lines. there is one large line going into the waterpump. coolant cycles through the reservoir and the system is self bleeding. the s2 setup eliminates this and uses a more traditional style overflow system with a pressure/bypass cap and expansion tank
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  3. #3
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    vn executive

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    cheers dude

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