Water pumps

[Swervedriver]

Read a couple threads, regarding water pumps. Which is best for replacement? New Audi plastic impeller, or go for the metal one. Read a few times, that people have experienced leaks with the metal one.

Cheers

Craig.

 

[shan00ble]

I just replaced mine with oem. I think I remember reading on here that audi revisited the pump design for the plastic impeller so it should be good to go.

 

[Swervedriver]

I just replaced mine with oem. I think I remember reading on here that audi revisited the pump design for the plastic impeller so it should be good to go.

Cheers fella.

 

[shan00ble]

Sure

 

[VAG-Slag]

plastic one is fine so long as it's changed every time the cam-belt is changed... If it's not the impeller gets brittle and basically ends up falling apart!

The other month we had a Leon TDI in with cambelt failure resulting in a seriously mashed piston!... Engine was removed, rebuilt and put back in the car. When we rebuilt the engine we used a metal FAI water pump.

After literally 9 miles the car was seriously over-heating. We scratched out heads, did some tests and everything pointed towards water pump. Surely this is not possible after only 9 miles!? Either way, the pump had to come out. As soon as I removed the pump the impeller literally fell off the shaft!!!!!

A slightly unrelated and long winded story but if anything another reason NOT to go for a metal pump!..

 

[Swervedriver]

plastic one is fine so long as it's changed every time the cam-belt is changed... If it's not the impeller gets brittle and basically ends up falling apart!

The other month we had a Leon TDI in with cambelt failure resulting in a seriously mashed piston!... Engine was removed, rebuilt and put back in the car. When we rebuilt the engine we used a metal FAI water pump.

After literally 9 miles the car was seriously over-heating. We scratched out heads, did some tests and everything pointed towards water pump. Surely this is not possible after only 9 miles!? Either way, the pump had to come out. As soon as I removed the pump the impeller literally fell off the shaft!!!!!

A slightly unrelated and long winded story but if anything another reason NOT to go for a metal pump!..

Great info, cheers.