ok problems keep rolling, so now slowly heats up when i put the AC on, when i turn if off the car cools. heads gaskets are new, changed the radiator like a year ago, at one point change the fan motor so thats new, just finished put new coolent in the car, just put new oil pump, so what else could it be. my dad thinks that the fan is not blowing enough air so does the fan change speed when the AC is on, does it turn off at one point cause i fan stays on all the time but does seem to change speed. at what RPM is the fan suppose to be. its been like this since i bought, but there is something stange thou, the fans wires are hooked on a starnge relay near the battery of the car and seems to connect to the ECU. ive seen other 3.4 but not like mine. what could this mean? o and should i just a high performance fan with a switch or just a high performace fan? P.S how many inches is my fan?

 

Running the AC places an additional load on the cooling system. The AC condenser sits in front of the radiator and feeds the radiator a lot of hot air when the AC is running, so the engine will tend to run somewhat warmer even if the cooling system is in good shape, especially in traffic. At highway speed, the air rammed into the radiator should keep the temperature normal. However, as long as the temp gage does not go into the red, don't worry about it.

Assuming the radiator is good and not obstructed (check in front of AC condenser, between condenser and radiator, and radiator and fan, wash all the bugs out), and the air dam under the radiator is in place, and that thefan turnson with the AC. Then, my guess is that the fan motor has seen better days and needs to be replaced, usually the bearings in the motor go bad and slow the thing down, and eventually seize up and blow fuses. The stock fan is more than adequate to do the job, no need to go through the nose bleed of adding a general purpose fan that does not fit right in.

 

air dam????????? never heard of it.