Bagshot

Well-Known Member

• Oct 28, 2017

• #1

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

Well-Known Member

• Oct 28, 2017

• #2

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

Well-Known Member

• Oct 28, 2017

• #3

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

 

T

tomcat59alan

Well-Known Member

• Oct 28, 2017

• #4

Dopey said:

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

Click to expand...

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

Well-Known Member

• Oct 28, 2017

• #5

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..