Now that the weather is warming back up, I'm noticing my Tacoma is running warmer than normal. I realize that there could be multiple causes: sticking thermostat, bad water pump, leaking head gasket and bad radiator.
I actually suspect the radiator--it is a single row, aluminum core, plastic tanks. It looks clean as a whistle looking in the fill tube. The truck has a little over 90k on it now. Was wondering if maybe the fins are not solid to the tubes or??? Any ideas? Look like replacement units are around $150--kinda hard to justify repairing the original, huh?
First, David, verify the gauge is correct.
Hmm, ah ha! I do have a HF remote reading thermometer around here somewhere--I could even verify if it's the thermostat with that too, right?
Now to remember where I put it. . . .
My Pontiac Grand Prix started running hot whenever I was in slower traffic. Turned out there was a bad ground for the circuit for the electric fan that cools the radiator.