Thermostat

Asked by Nov 01, 2016 at 02:22 PM about the 1987 Ford Thunderbird LX

Question type: Maintenance & Repair

1987 ford Third LAX v6 3.8. When
the weather temp is 65 or higher
the temp gauge gets up near high
but doesn't overheat. When temp
outside temp. Is 55 or lower the
temp gage is right in the middle.
Could this be a thermostat
problem.

2 Answers

109,735

It could be off a little, I would go ahead and change it out and flush the system with a good flush and you should be fine.

76,965

It could be a thermostat but your car should not run at the high end of the gauge at 65 degrees which makes me think you need to do some maintenance to the cooling system. I would replace the hoses and thermostat, flush the engine and radiator and install new coolant 50/50 with water. I would also put a bottle of Water Wetter in the radiator.

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