My local aftermarket dealer stopped selling Graf water pumps after two bearing failures in the last month (one failure destroyed the camshaft timing belt).
Pros: Hepu brand is quality
Cons: bearing failures, timing belt destroyed
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Get a new WP with metal impeller, Hepu, Graf.
Pros: metal impeller
Cons: worn seal
Just to let everyone know, it did indeed turn out to be a defective O-Ring on the Graf water pump I installed a couple of months ago.
Pros: running fine now
Cons: defective O-Ring
Vehicle:
Volkswagen Jetta
all graf water pumps with metal impellers are tested and balanced before packaged so why would there be any reason not to buy them ?
Pros: tested and balanced
Just following up on this- I replaced the water pump and that appears to have resolved the issue. I have been monitoring it frequently and there has definitely been no sign of coolant leaking under the car in the area it was doing it from.
Pros: resolved the issue
Cons: coolant leaking
Vehicle:
Volkswagen Jetta
My OEM plastic one broke and so did the metal-impeller Graf I replaced it with. They Graf seized up and leaked whereas the OEM plastic one just leaked.
Pros: null
Cons: seized up and leaked
Further, the metal unit (Graf) had a sort of reptile-skin texture to the impeller fins, no doubt a product of the casting process. I spent some time with a dremel polishing the fins (because that's how I roll ) to get them as smooth as the plastic ones being replaced.
Pros: smoother than plastic ones
Cons: reptile-skin texture
Mileage: 98000 km
I went with the Graf in my 95 passat glx. The graf has a cast iron impeller wheel. The stock one that was in there was plastic and some fins broke off when the pump failed
Pros: cast iron impeller wheel
Cons: plastic fins broke off
Vehicle:
Volkswagen Passat
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