Hepu is also my choice because they have the similar impeller as the Volvo pump.

I had once replaced a pump with one that had a sheet metal stamped formed impeller. I think it is similar experience you had. That gave no performance at idle for the heater in winter.

Your practice of replacing coolant pump with a new one when there is problem in that area and you feel it has enough mileage is the optimum waranty that you don't have a problem on the road. No need for a spare in the trunk as you say.

I actually keep the belts not thighter that specification. Just keep these from making noise. That is good no doubt for the pump bearing.


I take a pump out of service when there is some play on a worn bearing. Or a leak at the mushroom seal if there is a lot of mileage on the pump.

A rubber bellow failure is the worst because it is most of the time a major coolant leak. On the road ...

Good story and info on the cleanflametrap site.

Many thanks.