My water pump on my 01 sts has been making a grumbling noise for the last 5000 miles or so. Since we have a long weekend coming up I wanted to get it fixed. I did remove the belt and started the engine and the noise stopped. I then inspected the tensioner pulley and lubed it but that part seems fine. I have never changed out the water pump on a northstar before so I don’t if a cartridge swap will make the noise go away or if there is a bearing some where separate? Its not leaking any coolant just making a noise.