the water pump was replaced on my car 14,000miles ago 2009 what the pos of it failing? I know this is a ..how logs a piece of string question..any replys please.

 

These pumps have acquired a bad reputation largely due to the very early plastic impellers breaking.

Following cooling problems on two earlier V8's, I automatically bought new pumps. In both cases the pumps turned out to be OK when I removed them and the cooling problems were down to thermostat.

If in doubt, take it off and check. The only two issues could be impeller or bearing.

Graham

 

if you remember i have a post about cooling fans..I am awaiting a thermostat from british parts.somone sugested water pump and looked at my sevice history and could see that the pump was replaced 2009..this must be the later type part number jaj6 8912 from taunton jaguar..cant find any list or info for this.still scratching my head..
thanks for the reply

 

I thought you'd have already fitted the new thermostat and the water pump was a subsequent concern. Your thermostat must still be lying in some Royal Mail depot along with the indicator bulbs I've been expecting delivered for the last two days.

It is possible to check the pump is working without removing it. With a cold engine, remove the expansion tank filler cap then start the engine and run it at around 1200 rpm. The coolant can be seen circulating quite rapidly with swirling from the bleed pipe back into the tank. If the pump isn't working, there will be little or no coolant circulation and you won't see any swirl.

Graham

 

The swirl in the resivior may also be from the aux coolant pump which is electric powered and often overlooked. This pump will also make the swirling so I would not trust it completely

 

still got my birmingham screwdriver handy..big hammer