2001 impala overheating

[jtippett10]

2001 impala LS 3.8 liter engine with 140000 miles. the radiator fan on the back of the radiator was makign a really loud noise like something was hitting it, but whe I checked there was no obstruction, and the noise only was present when AC was on. The noise stopped, and the fan stopped moving at all. A week later, the car was overheating quickly(like 10 minutes). I changed the thermostat, but same problem. Do i need to change the whole fan assembly? thanks for any info.

[richtazz]

you can change the cooling fan motors individually, so the entire fan assembly doesn't need to be changed. The AC-Delco part numbers are as follows:

Driver's side= 15-8498 (GM dealer #22137318)
Pass side= 15-8490 (GM dealer #22136414)

[Lenta]

Do you think your coolant circulates inside the engine? The Belt loose doesn't circulate the coolant, check it to replace/ Ask people about the catalytic convertor (exost) stops maybe the exosted air passing through out through the pipe to back, so makes hot your engine? Ideas. I am not sure excactly why it happens, but such ideas. Just enough the coolant? Imagine the process: low cooland -circulation- belt-convertor-exost pipes....- parts that participate in the process and it will give an idea to fix youself and to save the money! Good luck!

[SpinnerCee]

If the coolant temp by the gauge reads lower when you're moving at speed like on the highway, the problem is likely the fans -- they're designed to be controlled at different speeds by the PCM, so a bad one would cause your issue (especailly if it is not running at all because it will block the normal airflow through the radiator) -- electric motors typically get noisy before they die altogether, so replacing the motor will help things get back to normal.

[Lenta]

ok thanks!