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Thread: P76 vs rover v8 water pump & timing cover?

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    cjc_td5's Avatar
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    P76 vs rover v8 water pump & timing cover?

    Can any one ID whether I have a p76 or rover v8 water pump on my p76 v8 stage 1?

    I understand that p76 water pumps are pretty much unobtainable? If so, will a timing cover from a '95 rover v8 bolt up or do I need an earlier model v8 cover? Getting the dizzy to fit?

    Cheers,
    Chris.
    Chris


    2014 D4 TDV6
    1954 86"
    1963 2A Forward Control (getting the full treatment, Isuzu 4JH1, MYY5T, LT230, Toyota Axles, extended cab ++)
    1980 Stage 1 v8 (gone)

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    P76 vs rover v8 water pump & timing cover?

    Found this it might help you with the reco pump
    I understood that using a rover 3.5 timing cover led to overheating in some conditions

    [URL]http://www.leylandp76.com/technical/parts/parts-actwaterpump.html [URL]

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    That's a Rover front cover assembly. A P76 one has the pump spindle way too low for the fan to clear the chassis rail supporting the radiator. If the pump is struggling to cool a P76 engine you'll need to find a smaller diameter fan pulley and machine it up to fit the hub. I once made a new fan pulley out of a VK Commy air pump pulley, that worked adequately on a P76 powered RRC.

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    Quote Originally Posted by bee utey View Post
    That's a Rover front cover assembly. A P76 one has the pump spindle way too low for the fan to clear the chassis rail supporting the radiator. If the pump is struggling to cool a P76 engine you'll need to find a smaller diameter fan pulley and machine it up to fit the hub. I once made a new fan pulley out of a VK Commy air pump pulley, that worked adequately on a P76 powered RRC.
    Thanks heaps for your knowledge.
    So a replacement rover v8 water pump will fit? Is there any benefit in fitting a "high flow"/performance water pump (if they exist)?
    Chris.
    Chris


    2014 D4 TDV6
    1954 86"
    1963 2A Forward Control (getting the full treatment, Isuzu 4JH1, MYY5T, LT230, Toyota Axles, extended cab ++)
    1980 Stage 1 v8 (gone)

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    Quote Originally Posted by cjc_td5 View Post
    Thanks heaps for your knowledge.
    1. So a replacement rover v8 water pump will fit? 2. Is there any benefit in fitting a "high flow"/performance water pump (if they exist)?
    Chris.
    1. Yes and 2. no. If you want 25% more flow spin the pump 25% faster with a 25% smaller pulley (or something like that).

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    Quote Originally Posted by bee utey View Post
    1. Yes and 2. no. If you want 25% more flow spin the pump 25% faster with a 25% smaller pulley (or something like that).
    Thanks.
    I have a cooling issue when the motor is under load on the beach or when stuck in traffic with no air flow. The radiator is new and the motor should be flushed as well as it can be. I'll check the pump next as it may have not been off for 10+ years. The impeller could be in any condition for all I know...
    Chris


    2014 D4 TDV6
    1954 86"
    1963 2A Forward Control (getting the full treatment, Isuzu 4JH1, MYY5T, LT230, Toyota Axles, extended cab ++)
    1980 Stage 1 v8 (gone)

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    Another thing to plan for is during a heads off job is to check the water galleries at the rear of the block and at the inlet manifold where the water flows to the thermostat housing. The rear block ports are where two casting cores met during manufacture and the ports can be partially blocked by thin wedges of excess alloy. Reaming out the passage and opening up the gasket a bit helps enormously. The inlet manifold port is way smaller than the head port and can easily be opened by 20% with a drill mounted burr or coarse file. Just blending the manifold port to the gasket is half the issue solved.

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    Well the pump impeller looks pretty good so the cooling issue isn't there. I'll get a new pump anyway. 3 bolts were sheared off and I sheared an additional one, so I have some tidying up to do first.
    Chris


    2014 D4 TDV6
    1954 86"
    1963 2A Forward Control (getting the full treatment, Isuzu 4JH1, MYY5T, LT230, Toyota Axles, extended cab ++)
    1980 Stage 1 v8 (gone)

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