overheating problem at idle

[drewams]

Change everything that it could possibly be. Water pump, and change your timing belt too, then change your thermostat. Maybe the fan switches and relay. make sure there isnt air in the cooling system, ect. Not that big a deal.

Why would you replace the timing belt and water pump if the fan isn't working when the car is on? I have heard of people throwing parts at a car, but that seems a little extravagant.

[DariuszZ]

Thanks for all the response!
Lets get to the answers...

is your radiator overflowing at all?

I dont think it does. The coolant level is at normal.

Ok first rule out your thermostat. 5 minutes at idle wont be enough to over heat the car if its fan related. With the car warmed up, feel the upper and lower hoses, they should be the same if not near similar. If not then its the thermostat.

Checked that, both hoses are full with coolant.

Why would you replace the timing belt and water pump if the fan isn't working when the car is on? I have heard of people throwing parts at a car, but that seems a little extravagant.

Haha thats why i ignored this

I just wrote the same thing in another thread but it is either your thermoswitch or your fan timer.. with the car running jump the harness that is for the sensor that is in the thermostat housing. Do the fans come on? If both don't come on, leave it jumped and try switching the cooling fan relay with the power window relay in the fusebox. If that doesn't make any change, it is more than likely your fan timer box located under the dash. I just had this issue and completely diagnosed the whole system with a meter. Exact same issue, it was the fan timer Unit.

Thanks, ill get to it right away. Im pretty sure the thermoswitch is fine, i need to look at that fan timer.

[Fleetw00d]

I dont think it does. The coolant level is at normal. .

Coolant level is normal in the radiator or the overflow tank? My EX had the symptoms you descrine (temp gauge rises quickly at idle, drops quickly when engine is accelerated). The overflow tank looked normal, but every time I checked the radiator after cooling down, it would be low. Finally noted air bubbles from the overflow tube from the radiator into the over flow tank. Head gasket leak was pushing air into the system which pushed coolant and air into the overflow, then allowed air into the system through the leak as is cooled down instead of pulling coolant in from the overflow tank. Not saying that's necessarily your problem, just something to check.

[accordztech]

Thanks for all the response!
Lets get to the answers...


I dont think it does. The coolant level is at normal.


Checked that, both hoses are full with coolant.


Haha thats why i ignored this



Thanks, ill get to it right away. Im pretty sure the thermoswitch is fine, i need to look at that fan timer.

You checked that both hoses are at the same temperature? Did you open the bleeder to see if there is air?