primalurges

Fan clutch, clogged radiator, or air in the system. Is this happening regardless of whether or not your fluid is topped off or does it begin to happen a few days after topping off?

Summers22

iTrader: (2)

I have read to test the fan clutch by sticking a rolled up magazine in it when its spinning. Sounds dumb to me, so hopefully it is spinning freely while the motor is off.

Toshbar

I stuck my hand into my jeep fan blade while it was spinning one time. I don't recommend that.

Travisfx405

Haha naa not the best idea I like to keep my fingers and hands I'll try the safe way first lol

Travisfx405

The fluid is always right on the mark no leaks, haven't topped up on fluid since I popped the hose months ago. If I'm stopped at a light for a while, stuck in traffic or in a drive through waiting on coffee too long lol the temp starts to rise and if I don't keep an eye to it the gage hits hot and then she beeps at me telling me to check the Gages. But if I turn the truck off for a few seconds literally 3 secs she goes back to normal like nothing happened. The truck hasn't gave me much trouble (knock on wood) since I owned it, only for this issue more annoying then anything lol with all the great help here so far I'll just have to check her all out and see what the issue is and get it fixed.

primalurges

When you engine is at operating temperature, with the engine off try spinning the fan with you're hand. It should spin freely only for about a second. If you feel very little or no resistance or if it keeps spinning it's bad. Since you have no coolant loss and you're not having the issue while moving it has to be the fan, clogged radiator, or air in the system. I wouldn't bother replacing water pump because when it fails it will leak and or get very noisy and either way you'd have coolant loss which you don't.

Toshbar

Does the heat work? I had a pump impeller separate from the shaft (3 of them in 4 weeks actually) and every time it would overheat but I'd get cold air blowing through the dash vents. Cold cabin air can also be from an air pocket.

CKsBAT

I can't remember who posted, but clogged rad fins might be the cause. Force water back through rad and condenser to see what comes out. All cheap things to try.