Reviews of GRAF water pump

As far as a water pump, the $24 Graf is your best choice. If you need the entire pump....that will cost more. I have also gotten very good water pumps from O'Reilley auto as well.....believe it or not. You probably should shy away from the plastic impellars.

I'd recommend getting a kit like this (...) from idp because it has a Graf pump, which has a brass impeller - some kits use plastic.

Geba, Hepu or Graf are all good quality and should all have metal impellers. I have been told that Graf is a little better quality, but I don't know.

Screw NAPA. Get a Meyle or Graf water pump, they meet and exceed OE standards.

Okay, so I installed a new aftermarket pump in my MK4 Jetta 2.0 last year. Went with the seemingly highly recommended GRAF metal impeller pump that many forum members across multiple forums seemed to stand behind... 14K miles later and it's leaking. Anyway, after doing some more research, it seems that it's considerably more common for aftermarket metal impeller pumps (especially GRAF, but seemingly all of them from what I can find) to fail prematurely for some reason...

Do you still have the original water pump? Those has plastic impellers that fail. Replace it with a metal impeller pump (Graf and Hepu are ideal).

I have a GRAF metal impeller water pump. so far so goof with it, i like it.

The stock pump failed back in Feb 2010, so i ordered a GRAF pump with metal impeller from ECS Tuning. Purchase was made on 1/27/10, parts got here on 2/03/10, and I installed pump late Feb 2010. Mileage was 127,257 when pump, timing belt, tensioner were done. In the middle of 2010, a loud grinding started at the front passenger side of the engine. I took everything apart and found the water pump with bearing grease or some waxy chunky crap all over the outside of it and on the inside of the timing belt cover like it splattered, and the pump leaking from the shaft. Car now has 135,362 miles on it, so thats complete pump failure within 8,069 miles.

I had a graff metal impeller waterpump start leaking from the weep hole about 2 months after replacement.

I had a problem with a metal impeller water pump: I did a tbelt change about 10K miles ago. Used a GRAF water pump with a metal impeller(I think it is most common with the aftermarket tbelt kits). The bearing seal started leaking coolant 8k miles later.