My daughter has a 2003 5-speed V-6 Mustang with about 60K miles. About a week or so ago, she noticed that the temperature gauge started to move slowly to the right when she started moving faster, especially above 30 mph or so. If she is driving slowly in stop and go traffic, the gauge stays in its normal position, but she can hear the electric fan turn on when it normally would not. Her boyfriend changed the thermostat with no effect.
I will be visiting her tomorrow so I have not had access to the car myself. It sounds like either a problem with flow through the radiator or possibly the water pump. She says there are no signs of a leak or unusual sounds. Therefore, I'm more inclined toward the radiator although I have heard of cases where the impeller comes loose.
I flushed the system throughly and filled with Preston Extended Life coolant about 2 1/2 years ago. Do you think one of the heavy duty flushes would be useful or would it be better to replace the radiator?
Thnak you in advance for your comments.
Jessidog
I will be visiting her tomorrow so I have not had access to the car myself. It sounds like either a problem with flow through the radiator or possibly the water pump. She says there are no signs of a leak or unusual sounds. Therefore, I'm more inclined toward the radiator although I have heard of cases where the impeller comes loose.
I flushed the system throughly and filled with Preston Extended Life coolant about 2 1/2 years ago. Do you think one of the heavy duty flushes would be useful or would it be better to replace the radiator?
Thnak you in advance for your comments.
Jessidog