Decided to start a new thread on this one -

Replaced the fan clutch ("borrowed" the tool from Autozone to hold the waterpump pulley)

Now the bad news - the fan clutch was not my problem.

Back to diagnostics.

1) I believe the thermostat is OK based on the fact that the top radiator hose is hot. Is that a valid assumption?

2) Is there any sure way to test the water-pump on while on the vehicle?
Bentley says to take the belt off and spin and check for play. I'm not sure that is a complete test. I'm looking for a way to tell if it is actually pumping coolant.

3) I'm going to test the aux. fan this evening. I'm really not sure if it is working or not. Question - With the air compressor on should the aux fan run regardless of whether the aux switch on the radiator is bad or not?

4) I'm looking for someone to do a coolant system pressure test (my luck it is a head gasket) but I'm having trouble finding a mechanic willing to diagnois problem unless I'm willing to let him do the work.)


Any other suggestions would be appreciated.

MB