Re: Do I really need a new radiator?
I replaced the Temp Sending Unit because in reading online, replacing that fixed a lot of people's cold temp gauge issues. My needle works a lot better after replacing it. Before, the needle would stay near C most of the time, now it slowly creeps up to around 1/4 of the way up - sometimes ventures up to near the halfway mark if I've got the AC cranked. It fluctuates a lot though. On other vehicles I've owned, the needle gets to just below half-way and then never moves, just maintains that temp constantly. On this truck, it fluctuates a lot, takes forever to initially heat up, and likes to "rest" around 1/4 up the gauge.
Are those symptoms of a thermostat that's malfunctioning? (stuck open?)
2003 Mazda B2300
Approx 145,000 miles on Odometer
Engine Oil: Mobil 1 5W-20