Waterpumps..............clockwise & counter-clockwise
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  1. #1
    Official RnS Addict falfasrevenge's Avatar
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    Waterpumps..............clockwise & counter-clockwise

    The BBC i've got in the '55 came from a scarab racing boat which had two 454 bbc in it.Mine,as it happens ran counterclockwise.Changed cam and rings etc and runs fine,if a little hot.Was mentioned today if i had the right water pump in as the impeller would be the wrong way.I know the serpentine pumps run differant but can anyone confirm one way or the other if the waterpump would be wrong? are marine bbc waterpumps differant ? or would it be as efficent ?

    Thanks
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    Col
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    They are the same as car ones except they have a stainless steel backing plate and bronze impellor. They work either way.
    Was engine Raw cooled? This can cause the block to fill up with shale & rust so this might be the cause. If this is the case you need to flush the block with some thing called Rydlyme, It's designed for raw water engines & coolers.
    Rad flush won't work properly as its a different type of blockage than a car would suffer from. it's expensive but does the job. Fill the system with a mix, run engine, let it sit for a couple of hours, then flush with fresh water.

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    Col
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    Official RnS Addict falfasrevenge's Avatar
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    Cheers Col,

    Flushed the engine with water from hose and also used airline with small pipe on through core plugs holes as did have some black,slimey stuff in it.

    Have you used Rydlyme ? Works out about £10 per litre so wondered how much is needed ?
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    Col
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    Yes I use it all the time to clean Marine intercoolers, oil coolers, and raw cooled engines etc: The beauty is it clears out the calcium & mineral deposits that you just don't get in a road engine.
    Cost wise, only worth doing if engine was raw cooled (ie) had seawater running through block. If you're not sure, have you got a photo of engine as removed from boat you could post?

    2litre would be plenty, just let it stand for at least 2 hrs.

    I will post a couple of pics later to show you how good it is.
    Last edited by Col; 12-01-2011 at 11:32.

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    Official RnS Addict falfasrevenge's Avatar
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    No ideal as the engine was on the floor....... But would a boat with nearly 15l (two 454's) be inland ?

    Black gup was similar to when normal radiators are removed
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    Col
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    Here is a before & after of an oil cooler I did with Rydlyme a couple of weeks back.

    Scarab is a beast of a boat (remember Miami vice?)
    Can you remember what colour it was painted as different marinisers used different paint.
    It was most likely Mercruiser being a Yank boat (black engine)
    Volvo Penta was Orange and Crusader-Palmer blue.
    Crusaders are freshwater cooled by default. The others it was an option.





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    Official RnS Addict falfasrevenge's Avatar
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    Definatly painted blue col.....still got the inlet and seized alternator somewhere
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    Col
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    Thats a Crusader Palmer (should have twigged when you said reverse rotation) Almost certain it is freshwater cooled originally. Have a look at the back of the waterpump. Has it got a stainless plate or mild steel? You can use a magnet to check.
    Last edited by Col; 12-01-2011 at 14:56.

  12. #10
    Col
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    Your engine would have looked like this in the boat.
    The cylinder running transversly across the back of the engine is the heat exchanger (boat radiator)



    You can see it clearer here (note the rad cap on top)




    So really yours should have been freshwater cooled originally. It won't hurt to put rydlyme in but it sounds like it doesn't need it assuming it was FW cooled.

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