Water pump AISIN or GRAF

Graf here. 15k miles/ 2 years, no problems.

I have only got my AISIN water pumps when ordering timbing belt replacement kits which include a new water pump, but they always came with a quality seal for the pump.

A Bosch o2 sensor is going to work just like oem, an aisin water pump is going to last as long as oem. But moog balljoints don\u2019t.

I use on my 12v and 24v VR6 engines, Eurowise aluminum thermostat housing and 42DD stainless steel crack pipe. Water pump I use GRAF or Hepu for its metal impeller.

The AISIN kit is the same water pump and tensioner as the OEM equivalent with out the Honda stamped on it. I personally would still get the OEM timing and Drive belt though.

I’ve changed two water pumps with Aisin brand WP’s from EBay … about 120$ each … and I’ve done fine so far, logged over 100K on them first and then so,d the car. it’s still going strong. the second is going strong in my current car.

The fel pro gasket set and head bolts + head bolt tool will be close to 300 and then you'll need RTV sealant. Another probably 200 for the Aisin water pump.

what I had problems with is with Graf water pump, that was included as part of FCP euro cooling system kit, water pump seal around the bearing started pouring coolant like a waterfall after only 11k miles, I replaced it with a Stewart pump

I want to share a brief but critical report regarding the recent replacement of the engine's electric water pump (EWP) on my Prius Gen 4. The analysis of the data logs revealed an alarming scenario; the new aftermarket pump's performance was completely unreliable, showing clear evidence of torque failure and instability. I had no choice but to purchase the Original Equipment Manufacturer (OEM) pump from the dealership (it was stamped with the AISIN logo). The problem was instantly and definitively solved.

Get the OEM water pump, I had no luck with aftermarket Aishin. They leaked almost immediately.