I'm a car novice in an extreme sense, so I've done some research and I think that there's a problem with the radiator fan. It seems like that is fairly common. However, my shop will not check in to that. Instead, they are playing a guessing game and want me to replace my 4 year old water pump for $360. Their guess is that the blades of the water pump have rusted or broken off, so that it is intermittently working. From what I have researched, this almost never occurs in cars espceially in a water pump that is 4 years old. I also found out this is a much more labor intensive job than anything with the radiator fan, so I think they might be trying to gouge me for labor charges.
I did a little experiment with playing with the ac, and when the ac is on the car stays cooler longer, then suddenly the temp shoots up. When the heat is on, the temp get hotter faster, then slowly levels off. I know with a radiator fan the ac will kick the fan on, so does the car getting hot tell me that it's not the fan? Is there an easy way to test it in the shop?
This is the only half-way reputable shop within 45 minutes of me, so I don't have the option of going somewhere else. They also warranty all of their work, so if the water pump is not the cause they have to refund the money. If you were me, would you make them investigate the radiator fan, or just let them replace the water pump? Any other suggestions on what it might be are also appreciated!
Edited by Starry, 04 November 2009 - 03:12 PM.