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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
Cooling System
Thanks Drew for responding I drained small amount out of radiator then removed T-stat housing and replaced T-stat and made sure it was positioned right then refilled radiator checked for leaks and had this problem ever since.
I recently replaced my t-stat in 99 v-6 4.0 ohv ,now I can hear thumping sounds coming from the heater core area. No other problems temp is fine and heater works great . Could this be trapped air and how can I fix this.