Grand Marquis V8-4.6L Flex Fuel (2010)
Heater Core: Testing and Inspection
Heater Core - Bench Test
Climate Control System
Component Tests
Heater Core - Bench Test
1. Remove the heater core from the vehicle.
2. Drain all of the coolant from the heater core.
3. Connect the 101 mm (4 in) test heater water hoses with plug and adapter to the core tubes. Then connect the Radiator/Heater Core Pressure Tester
to the adapter.
4. Apply 138 kPa (20 psi) of air pressure to the heater core. Submerge the heater core in water.
5. If a leak is observed, install a new heater core.
