I have a 1987 Ford Bronco II 2.9 Liter that had 100,000 mile on it. The Truck runs hot and sometimes over heats. I have flushed the Radiator,changed thermostat from 195 degree to 180 degree not much help. How can I tell if it is head gasket,water pump or radiator.1987 Ford Bronco II 2.9 Liter V6 overheats?Check your fan clutch first. with engine off, spin the fan with gentle pressure. the blade should move no more than a quarter ways. if it moves freely with no resistance, there's probably your problem. if it doesn't rotate at all, fan clutch is bad also. if head gasket is bad, you will see water on the oil dipstick and oil floating in the radiator.
With engine on and running, get engine hot. turn engine off and feel around radiator. you're looking for cold spots. any cold spot is potentially a plug in the core.
your water pump will squeal if it's going out, OR it'll start dripping from the bottom portion, which means the seals are giving out. I doubt its any of these. My vote is for the fan clutch.1987 Ford Bronco II 2.9 Liter V6 overheats?A leaking head gasket will make the car miss, and water will be in the Oil-and you will be using water, Gray looking-oil Water pump should have a drip if its worn out-bearing- is there an A/C coil in front of the Radiator-
