Water pumps

[Mitakid]

I need to change my water pump,and I am wondering if anybody has any information or experience with the Stewart High Performance pump,mainly are they worth it or should I replace it with the OEM part,thanks.

[3050rpm]

I haven't heard of these, and frankly I can't imagine any need for one, or to put it another way if someone does need one he's probably beating the hell out of his car in other respects as well. I say save your money, if you're not aware of it already just be sure to get a metal pump, not one of the infamous ceramic ones.

[Mitakid]

The Stewart High Performance Water Pump is a direct replacement pump designed to fit with no modifications. That includes accepting the Factory Fan Clutch. The front of the BMW High Performance Water Pump is stock appearing giving it that classic BMW look while the back is all business.

# Up to 20% increase of water flow over stock pump
# Twice as efficient as factory pump
# Much less parasitic drag than other pumps
# Racing or Stock Factory Replacement applications
# Stainless steel impeller
# Heavy duty bearing
# High quality water seal
# Limited Lifetime Warranty

[3050rpm]

It all sounds like advertising hype to me. If it's about the same price as a regular, metal impeller pump, then go for it if you wish, otherwise I can't see spending any additional money. Aside from that notorious ceramic impeller problem, I'm not aware of water pumps being a particular problem. Good coolant system maintenance is the prudent way to go, with regular complete flushing (including engine block) and use of a properly formulated coolant.

[motorwerks]

They are really made for hard driving applications such as Auto X. If you're just a regular street driver, or just enjoy occasional spirited drives, then you won't see any benefit other than a lighter wallet.