bigjohnstud4200

Just to be clear, with the A/C off in stop and go traffic, do you overheat? Driving is definitely going to drop your coolant temps, but if you can't idle without an overheating, you're problem is not related to the A/C. I live in Arizona and it's 112 right now. I can idle just fine with A/C on, just like everyone else. My guess is that you need a new water pump. or maybe the thermostat is not fully opened. Once the car is fully warmed up, if you touch the radiator hose is it hot, warm or cold?

swat223

no i dont..but i just put 160 thermastat in and sat in my drive way for about 40 min and it started to go past the halfway mark..so i shut her off and i noticed the overflow must of spit some antifreeze out..i just dont know what to do..i know the radiator get extremly hot

bigjohnstud4200

Maybe the your radiator flow is restricted. Might want to look into a radiator flow test. Also, do you see any water around the weep hole in the water pump?

swat223

noo..i think im going to go to autozone tomorrow and pick up a radiator..what kind should i get do u think?

torchred02

i just got my cooling system checked because it was overheating and it turned out i had an air bubble in my system which was causing the coolant to not circulate.

might wana check that out

swat223

i heard about that..the guy at autozone said to run the car and squeeze the hose underneath and that gets the air bubbles out...but i guess that was the problem or i didnt get it all aha

swat223

im going nuts..this only happens when i put the ac on and im at a stop.. other then that its all fine

maxshuty

Sorry if this is a repeat (didn't read the thread) but is there any possible way this could be some sort of wiring problem with the gauges or anything? That might be stupid of me to say since I really have no idea but it just sounds kind of odd with the AC although I could see that happening.

I remember in my old Mazda 626 I had an over heating issue that never seemed to go away. took three thermostats, (I learned to replace them myself pretty darn quick after doing it three times lol), couple other things, and finally a new radiator to keep it from overheating.

MOOK3456

Found this on another forum...

I think Socalwrench is right, it has to be fan related which is why it doesn't happen during open driving (more air flow)

Edit: just saw you said it was mechanical... This may sound silly but check to make sure the fan blades aren't installed backwards. It's been done before.

bigjohnstud4200

The fans should kick on almost immediately after the A/C is turned on regardless on if the car is at operating temp or not.