My car keeps wanting to overheat while at idle, not while im moving, just at idle, like if i sit in traffic for awhile. So far I replaced the fan switch, thermostat, fan relay and the fan. Everything seems to work, the fan comes on and the lower hose gets hot indicating the thermostat opens. The only thing I havent replaced is the radiator and cap and the water pump. What in the world could be causing this to overheat at idle?

 

Does it Idle low?

If it Idles low it could be your head gasket.

 

it doesnt seem that the idle has changed any, the idle has always been from 600-750, and it has just recently within the past week or so started this overheat thing, plus if it were a headgasket it would overheat more while driving then at idle would it not

 

Yeah but my car had a really low Idle and it was burning coolant so I needed a new head gasket.
Well, Your guess is as good as mine. Someone here will figure it out sooner or later though. I wish I could help more though.

 

its either a blown headgasket or your car is running too lean at idle, my car started to heat up a littla at idle when i leaned my fuel out a little

any smoke coming out of your exhaust? if so what color?

and it may be that your injectors are clogged and it is runing lean, get some injector cleaner and look for the smoke

 

also i just noticed that you have a DA, ive had a few of those and want another one again, but they are notorious for blowing head gaskets, both of the ones i had bad ones, you may want to try to change this and put on a new wter pump and timing belt while the head is off

 

either head gasket or water pump

 

well i have no smoke, no mixing, and no loss of coolant so i think that rules out the head gasket, ive had a blown head gasket before and this doesnt feel like it, im gonna replace the raditator and cap, and the thermostat again because im not sure its working properly, and if it still does it, on to the water pump

 

hmmmmm, it probaby is the water pump, that fix isnt too hard, hopefully you can find the problem