Ford pu overheating!

Asked by Guru9DH6ZF Nov 08, 2020 at 12:41 AM about the 1999 Ford F-150 Lariat LB

Question type: Maintenance & Repair

Have 99 Ford pu, replaced radiator
water pump thermostat but when start
when engine is cool temperature
gauge goes to hot! Top radiator hose
is cool! Turn off and when I restart
truck goes back to normal! Replaced
thermostat twice! Any suggestions

2 Answers

F_O_R answered 4 years ago

I think you have an air pocket. Purge air out of the cooling system.

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James answered 4 years ago

Check the wiring going to the coolant temperature sensor. If it's damaged and a bare spot on the wiring is touching something metal it will drive the temperature gauge to hot without the engine actually overheating. A faulty coolant temperature sensor can do that too. Hope that helps! Jim

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