P38A Diesel water pump, plastic or metal

Bagshot · Oct 28, 2017

I know the subject of overheating has been done to death, however luckily I haven't got that, but.. going through my engine rebuild found that I have a plastic impeller pump. In good nick with no damage or play, so my question is.. Is it worth changing for a metal one and am I going to gain anything. Or is it just as well to keep what I have. I'm happy to take advice either way.

Wazzajnr · Oct 28, 2017

From what I've heard, they both work fine when OK but the impeller is prone to coming loose on the plastic ones causing overheating.
If it were me and I was deep into the engine, I would replace it as a matter of course anyway.

Dopey · Oct 28, 2017

I heard, metal is best.... but was never told why???

tomcat59alan · Oct 28, 2017

Dopey said:
I heard, metal is best.... but was never told why???

Because the plastic impeller loosens on the shaft . While I've got my engine stripped down I found I had a plastic impeller so I'm fitting a new pump with the metal impeller. Saying that the old one has done at least 12 years service.

Bagshot · Oct 28, 2017

I know it's only £30 or so but thought I would ask, as seeing as the rebuild cost is mounting up, £30 is a new sprocket or an injector serviced.
But metal impeller it is.thankyou all for the advice..

P38A Diesel water pump, plastic or metal

Bagshot

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Wazzajnr

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Dopey

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tomcat59alan

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Bagshot

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