Another overheating thread

[Mopar69/95]

did the test and im pretty sure my clutch fan is buggered. that would explain gettin warmer when not moving.

also i've never actualy seen or heard my thermo come on either...?

my aircon use to work but as far as i can remember it hasnt worked since i installed my head unit so im thinkin i stuffed something with the controls in the dash. by moving the knob to air con nothin happens at all.

if the relays for the aircon are stuffed or something else isnt right with the aircon system(electicly) will the thermo still work when the temp reaches 105?

[nixon]

Originally Posted by Mopar69/95

how can you tell if your clutch fan is buggered?

I dont advise adding grill mesh, i did last sunday, drove monday morning and uninstalled monday night. Ok when cruisin but doesn't allow enough flow in stop start traffic causing the temp to rise to 110/120.

I have recently changed my radiator and temp stays normal on the highway but city driving gets to temp and drops by half when thermostat opens(95deg). Will adding gojeep's restrictor fix this, im just worried it may fix for city driving but will stuff highway driving or with load?
Any ideas?

You'll know it buggered because you'll hear it, mine went and you know it's gone all it takes is to lift the bonnet and u can hear where it's coming from. It's like a $90 fix though, but it's a pain to pull out and replace.

[disco_nex]

Well, not to kick this thread again, but I thought I would do it for reference. The clutch fan DID need replacing, but it has not fixed the problem. Just from a practical point of view, this is an example of how the most recent overheating issue occurred:

I drive at a continuous 80-100 km/h with the air conditioning on for 20 km with the temperature sitting at near 100 C. The outside air temperature is near 30 C. As traffic slows, I switch the air con off and switch on the auxiliary fan via my override switch while driving at a mixture of city and open road driving for 10 km. The operating temperature increases to near boiling temp.

My theory is that it is the water pump now. Seems to be little water pressure through the top radiator hose while at operating temperature.

Other people believe it could be a head gasket. I have considered it, but there has been no water out of the exhaust, no mystery coolant loss and the spark plugs are clean.

[Easy Rollins 1]

Wrong temp range thermostat?
Clogged radiator?

[junglejuice]

Originally Posted by Mopar69/95

i have a 95 limited 4.0, im pretty sure its just the one sensor.

The 94's & 95's have two temp sensors, one at the front near the thermostat and one at the rear of the head near the intke manifold, the rear one is for the guage the front is for the ECU...

[disco_nex]

Thanks for suggestions Easy Rollins and JJ.

The thermostat is brand new and is the correct model. The radiator cannot be clogged, as it is relatively new, plus I had back-washed it recently.

I will consider the temp sensors as well, but I am pretty sure they are working correctly from my experience