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.
Get a new WP with metal impeller, Hepu, Graf.
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.
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.
all graf water pumps with metal impellers are tested and balanced before packaged so why would there be any reason not to buy them ?
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.
I ordered one from MJM Autohaus, a Hepu unit and its impeller is metal
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.
My local aftermarket dealer stopped selling Graf water pumps after two bearing failures in the last month (one failure destroyed the camshaft timing belt).
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