Water pump Gates or Hepu

I ended up keeping the gates kit, I've put about 8k miles on it so far.

Any replacement whether it br Graf or Hepu are going to have a metal impeller and be an exact factory replacement. The wheel itself will be identical in shape and circulate the same volume of coolant.

I ordered one from MJM Autohaus, a Hepu unit and its impeller is metal

Metal impeller model is available but can be hard to find (Hepu brand). Recommended interval for changing is 80-100K depending on who you talk to. But many fail earlier and may fail as early as 20k. Change as preventive maintenance.

My original plastic impeller pump failed at 145k miles. I replaced with with a metal impeller pump (Hepu IIRC).

Don’t use a Gates kit or if you do purchase the Gates kit without the water pump and get a different brand water pump. Gates water pumps have an enormously high failure rate in the last several years and it sucks to have to do the job twice.

Water pump failed on the gates timing belt kit and engine shredded only 16000 miles on it

Gates water pump failure

I have seen early failure with the Gates water pump and wont use them.

Don't use Gates water pumps.