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Thread: Header Tank

  1. #1 Header Tank 
    club member
    Join Date
    Oct 2021
    Location
    Mayland CM3 6EJ Essex
    Posts
    8
    Ahoy ! Me again !
    Fitting overflow/header tank and find I have two connections, one of which I am happy goes to the header/tee tank but not sure where the other goes ?
    Suspect either another outlet on induction manifold or a tee into the heater elbows ? Free beer !
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  2. #2 Re: Header Tank 
    club member Club Member
    Join Date
    Nov 2011
    Location
    Okehampton, Devonshire
    Posts
    79
    Hi,
    Can you post up a photo of your header tank so we can see where the outlets are. What engine is it for? I have a Rover V8 and use an SD1 header tank. My header has a bottom feed to the engine and a top outlet that is above the pressure cap seal, so as to take any expelled water away to the ground. Hope this helps. Regards Mike
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  3. #3 Re: Header Tank 
    club member Club Member
    Join Date
    Mar 2013
    Location
    Fife, Scotland
    Posts
    620
    Different engines will have different plumbing.
    Typically, a flat cap with no pressure relief is fitted to the radiator. A pipe is fitted to the overflow on the radiator and connects to the header tank, which should have it's own separate overflow. A normal rad cap with pressure relief should be fitted here. A larger pipe should be connected to the bottom of the header tank and plumbed in to the rest of the cooling system. This should be at a point that will promote circulation through the header tank, to help with separating air from the coolant. The overflow from the header just runs to ground.
    Last edited by scott h; 16-11-2021 at 11:28 PM.
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  4. #4 Re: Header Tank 
    club member
    Join Date
    Oct 2021
    Location
    Mayland CM3 6EJ Essex
    Posts
    8
    Funny how when you sleep on it the penny drops ? The connection for the pipe from the tank to the radiator cap is above the pressure cap so it is a spill off and he spare pipe on the catch tank is simply the overflow which should point down behind the engine.
    Thanks for replies !
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