Ford Repair/Coolant "explosion" after shutting engine off
uncle duke wrote at 2015-08-31 19:59:41
Start car and warm up somewhat.
With the hood up, shut engine off and observe fan spinning. A good fan clutch will have the fan stopped in 2-3 seconds, anything past 5 seconds put on a new one. I'd be leary after 4 seconds of spinning after engine is shut off.
If your thermostat doesn't have a 2-3 mm pilot hole drilled into the chrome flange area, drill one through it. It helps bleed air and prevents collapsed hoses.
Add a tube of aluma-seal to the radiator. The chrome powdery stuff.
If your up to the task, remove both heater core lines and blow out with compressed air. Blow through one and put a catch pot under the other.
Scrape any crude/rust from fittings coming from engine coolant fittings including the one going to the throttle body.
You may be able to remove front cover bolts one at a time and apply sealer on the threads and reinstall the bolts but keep in mind you may have a failing gasket. While doing that check the little angled by-pass coolant hose going from pump to intake.
I think you said the a.c is still operable. Please maintain the system to prevent headaches farther down the road.