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've also had a Graf I think it was, it did have a metal impeller, which started leaking after 7 yrs.
Graf here. 15k miles/ 2 years, no problems.
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.
If it *is* leaking you might want to consider replacing it with a Graf alloy-bodied pump which won’t be affected by heat and exposure to oil, the usual causes of eventual failure of the plastic pumps.
Graf has been pretty good to me.
I have the Graf brand on mine, replaced mine at around 120k miles. It’s aluminum and has aluminum impeller also.
I installed one on me 325i 12k miles ago, no issues so far, it was part of the FCP euro water pump kits
the metal fins are spot welded like shit on these cheap metal waterpumps. my graf pump also started to leak from the weep hole after a year too
6 months and 4000km on mine. Only found out a while after Graf has a bad rep. But no problems with mine yet.
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The brand is registered in Italy. Official website: http://www.graf.it/.
In March 2026, PartReview users have a mixed opinion of GRAF water pump.
PR Score — 70 out of 100, based on 68 reviews and 208 votes. 46 positive reviews, 4 neutral reviews, 18 negative reviews. Average rating — 3.5 (out of 5). Vote balance: 146 up, 62 down.
In the ranking of the best water pump this part is at position 2, behind AISIN , but ahead of Hepu and Pierburg.
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In particular, see which water pump are better: OEM Toyota or GRAF, GRAF or GMB, Saleri or GRAF, AISIN or GRAF, GRAF or Hepu .
