My 2004 mini cooper has a overheating problem that I cant fin. I aready change the fan,thermostate,temperature sensor, water pump and the radiator tap. the car does leaks and while driving it doesn't overheat only when stops a redlights or traffic do you think it can be the radiator??? is the only thing I haven't change????
Have you tried flushing the rad if you have a leak it will suck air into the system or worse still get the head gasket checked
SOURCE: Mini cooper s 2002 overheating
block test the cylinder head checking the coolant resivor for exhaust gases. after multiple overheats the heads are a lot of times warped.
SOURCE: 1997 bmw z3 conv. 1.9 overheated, changed
hi jasso, I would recommend checking the water pump if you see no flow in the radiator. Make sure when you fill up the cooling system, that you fill it cold, and that the vent screw in the radiator is loose. fill system until fluid comes out the vent screw. tighten the screw, start the car and have someone run at 1500rpm and check for flow.also, make sure that you have your temp setting full hot and blower on middle speed so that you don't trap air in the heater core.
SOURCE: overheating prob in chevy camaro z28 97
Check for obstruction in front of radiator/condenser that would cause loss of airflow through the core.Sometimes these cores get clogged with bugs or debris and airflow is deminished. The reason for overheat with A/C on is that the condenser adds to the heat in front of the radiator and if there is not enough airflow then the engine also runs hot because radiator can not be cooled sufficiently.
hope this helps
SOURCE: 1998 Cadillac DeVille Overheats
The cooling fans will not come on until 225 degrees. Normal temp is around 199-215. Sitting still in traffic most will inch up around 220 or so. When you turn ac on it turns the fans on and may cool down engine, Check fan operation.
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