Test Water Pump

[dave030445]

hi all

is there a test you can do to see if the water pump is not working properly while it is still on the car the problem is heater only blows out hot when you rev it if sitting in traffic it blows cold so someone said it could be the water pump as its a big job to remove on the 2.8v6 was hoping to do a test any help chaps

cheers Dave

[tim-spam]

If the heater works with the engine under load, this would suggest that the water pump is working. The fact that it cools down at idle would point to the thermostat being the problem.

[seatkid]

If the heater works with the engine under load, this would suggest that the water pump is working. The fact that it cools down at idle would point to the thermostat being the problem.

hmm....dont know about that.....

 

 

Has the system ever been drained or lost water? Could be an airlock above the heater matrix.

 

If the car is fitted with the infamous plastic impeller pump, then the impeller becomes detached from the shaft usually causing overheating problems.

[dave030445]

If the heater works with the engine under load, this would suggest that the water pump is working. The fact that it cools down at idle would point to the thermostat being the problem.

hmm....dont know about that.....

 

 

Has the system ever been drained or lost water? Could be an airlock above the heater matrix.

 

If the car is fitted with the infamous plastic impeller pump, then the impeller becomes detached from the shaft usually causing overheating problems.

hi yes its had loads and loads of water leaks go through more water then petrol (and thats saying something on the thirsty 2.8 v6) what would be the best way to try and get rid of the air lock if thats what it is