F150 overheating and is also overflowing coolant from overflow res.

Asked by Tony Nov 28, 2016 at 02:29 AM about the 1996 Ford F-150 XLT 4WD LB

Question type: Maintenance & Repair

My 1996 f150 is overheating after it gets warm and
is starting to push coolant through my overflow
reservoir. I've changed the thermostat multiple
times ant it bypassed my heater core thinking it
may have been clogged and still no effect. What
would be the next best suggestion as to what is
wrong with my truck?

1 Answer
74,270

OJ answered 7 years ago

If the water pump is defective/broken and not spinning the impeller inside, it will cause an overheat condition. If you have a radiator cap on the radiator, look down the throat when up to operating temp. If the water is not moving the pump is shot or thermostat stuck closed.

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