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[rds]

Happy New Year all

please can i have the collective wisdom on what water pump to buy for a low mileage 2003  2.2 Z22XE ecotec engine omega?
1 GM but has a nylon impeller, about £80
2 pattern part by Valeo with steel impeller £40
3 pattern part by FAI with steel impeller £25

I only give the relative prices for completeness, but not so that the price is the dominant factor: i am most interested in whether the steel or nylon or make is the best here.

The car is a keeper (owned from new). Water pump is only being changed as it is time for the cam belt change.

Thanks in Advance

RDS

[tunnie]

GM used to be steel, but switched to Nylon as part of the penny pinching on parts.

[Nick W]

Any of those are established brands.
I have seen too many plastic impellers fail, so personally would avoid that one whatever brand it might have been.


Then it comes down to price and availability: I would tend towards the cheapest.

[johnnydog]

Just as a comparison, when the last Audi S4 was introduced in 2009 ish, many were recalled to have the plastic water pump replaced due to coolant leaks. The plastic water pumps were distorting, and they were replaced with metal water pumps. No further issues....

[rds]

Interesting, thanks: i had wondered if GM used nylon impeller in case of bi-metallic action with the alloy block? didn't realise the older ones were steel though. Makes you wonder if "OEM is always better" at all....?

RDS

[baggers]

Avoid plastic impeller. Nothing wrong with FAI.
Price and quality don't always go hand-in-hand.

[rds]

many thanks to all!

[Mr.OmegaMan]

The GM water pump I got from VX a few months back had a metal impeller.

[dbug]

I managed to get a QH one a while back for the V6, and that has a metal impeller also.  Currently in my stock.

[Ian66]

Hi all, I know change of subject but I've had major coolant lose today all in one go, and would to find out if any one has any ideas please,  yesterday I found alot of water in the passenger footwell, but found the drain under pollen filter full of water and blocked, please help

[Diamond Black Geezer]

Do feel free to post under a new thread (or search the forum for similar symptoms as yours)

However.. water in the footwell and pollen filter area full of water is classic standard Omega blocked drain. Stick your hand down, and route out all the dead leaves/sweet wrappers/sludge until clear. This is not coolant it's just rainwater. Low coolant is/should be separate issue entirely.


OP - got a GM waterpump myself a bit ago - with metal impellers. Metal ones the way to go, for sure, plastic as said, fail and make engine go bye-bye, make owner sad face man. 

[rds]

Thanks again all; I've just been told that the valeo steel impeller water pump, gm coolant header tank, dayco  belt and larger battery (096) have just arrived! will check them over later.

here's to a dry day to do the job.........

RDS

[Diamond Black Geezer]

Thanks again all; I've just been told that the valeo steel impeller water pump, gm coolant header tank, dayco  belt and larger battery (096) have just arrived! will check them over later.

here's to a dry day to do the job.........

RDS

Hear from you in June, then!

[rds]

this year....?

[Diamond Black Geezer]

Hopefully!