Sharkey

iTrader: (1)

got a quick question, is the impeller in the oem water pump steel or plastic?

im having a cooling issue with my ecotec swapped 944 that acts like a slipping water pump impeller

exninja

iTrader: (1)

Steel

Slowbalt2000

iTrader: (1)

They can be both. From my experience, older ones were plastic and newer ones were steel. Ive only ever had one steel one.

exninja

iTrader: (1)

good thing i'm hanging on to my steel pump from my crappy LNF

Sharkey

iTrader: (1)

that would make sense then. the engine was originally an 04 cavalier l61, and i know its an original pump, so its likely a plastic impeller then.

for the record, car is acting like it has low coolant flow at lower rpm. temps will just keep climbing while cruising, drop a couple gears and get the rpm up and itll drop right to 180*f within a few seconds. im suspecting the impeller is slipping on the shaft.

exninja

iTrader: (1)

sorry i assumed. i thought it was just the germans that did silly things like plastic water pump impellers

Sharkey

iTrader: (1)

well, the ecotec is partly saab, so kinda sorta explains it lol.

i pulled it apart, and the impeller is in fact plastic, but there is also nothing wrong with it.

exninja

iTrader: (1)

mostly Opel (esp the early ones) so yeah it does make sense