Our Xterra has been overheating for about 2
years. We've gone through probably close to
$10k and 5 mechanics, including the
dealership. We've had the radiator and
hoses replaced, head gasket sealed and
tested several times, new thermostat, new
fan clutch, and everything else anyone in
person or on the internet has suggested in a
case like this. We even had the EGR Valve
replaced due to emissions last year. We
also just had the transmission rebuilt,
thinking that the overheating problem was
solved by the fan clutch replacement.
However, it is still overheating on the
freeway ( did okay for a few trips and then it
started acting up again). Now the check
engine light is on again, too (which was an
annoyance in the past which our original
mechanic and the dealership blamed on the
light malfunctioning). And no one can figure
out why this stuff is happening. What could
we be missing?
Also, not sure if it's related, but for a long
time before the overheating even started, it
started squealing. The squealing stopped
(we assume from the mechanic repairing it),
and shortly after, it started overheating.
Was it actually overheating? Was coolant disappearing? Did you have the water pump changed? Was the squeal caused by the belt slipping? How many miles on this vehicle? What is the code for the check engine light? We need more information.
I had that problem on my 01 xterra it turned out to be the coolant temp sensor
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