I have less than 4k miles on a Hepu water pump which I believe is a
german made unit, I suppose it could be bad or dying but I hope not.
On Jan 6, 2010, at 3:12 PM, Kenneth Lewis wrote:

> David,
>
> Consider a worn impellar in your water pump. At speed you have
> reasonable
> head pressure but at idle there is not enough pump efficiency to push
> coolant that far. I have seen it. The difference is obvious when the
> defective unit is visually compared to a new pump.
> In the past, I had some bad luck with Italian made pumps. I strive
> for the
> German ones.
>
> Ken Lewis