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[adammj]

Ok. For the last several months I've been overheating while idling and the truck would overheat shortly after turning off the engine. I do courier work in Phoenix so that means lots of 10-15 minute stops, by the time I get back and start her up again, the temp gauge is off the chart. I never, ever had heat issues while at cruising speeds. Talked it over with my mechanic and figured it had to be a flow issue in the radiator (137K miles, factory radiator). This weekend, I replaced the radiator. The whole process went very smoothly.

However, now I am overheating at highway speeds if the A/C is on and when going up hills but NOT when idling (A/C on) and NOT after shutting off the engine. In other words, the exact OPPOSITE problem I faced before.

I've pretty much ruled out the fan clutch. The fan blows strong and it has passed a few different tests I put it through that some folks recommended. Also checked for air bubbles in the cooling system, came up with nothing.

I'm stumped at this point. Any thoughts? Thanks folks.


2002 V6 A/T 2WD No Supercharger