Bobsep84

i am having a strange problem with my car. For some reason my radiator fan does not turn on till 240 degrees! i have a 180 deg thermostat so as long as im moving the temp is fine, but if i idle...it will keep getting hotter and hotter and no fan till like 240. i replaced the coolent temp sencer with no luck. is my computer set to turn them on to high or is there something else? i need to fix this before summer!

Red96Lt1

Yeah that's normal. I freeked out too when I first noticed that. The only way to change it is to get a tune and they can change that. Or you could do a fan switch.

Bobsep84

Yea, that is really weird cause OEM temp is 180 thermo and thats what i got in there....thats really werid that it waits sooooo long to turn the fans on. the it gets real close to that red mark. thanks for lettin me know thats normal

shoebox

The only way to really know what the PCM is seeing as the temp is with a scan tool. It is also possible that your temp gauge is the one that is reading higher than it actually is.

Bobsep84

Do you guys know what the OEM fan turn on temp is?

shoebox

The pcm will command low speed fans "ON" at 226º and "OFF" at 221º and high speed fans "ON" at 235º and "OFF" at 230º.

bluezed28

It's likely that you have air in your cooling system. The presence of air will cause your themostat to open late or not at all, thereby causing your engine to overheat.

When you car is moving you're forcing the coolant through the system since the water pump is working harder, but at idle the coolant recirculates at a slower rate thus overheating.

I'd try bleeding the air, this is the cheapest solution (free) and most likely problem.

Wallace

Bobsep84

Yea, i bleaded the system of air already. the problem isn't there...the problem is the radiator fan not turning on when the engine reaches a certain temp. i have no idea what could cause this. by the way, turning on the A/C does turn on the fan like its suppost to