Explorer Sport Trac 2WD V6-4.0L (2009)
Heater Core: Testing and Inspection
Heater Core - Pressure Test
Climate Control System
Component Tests
Heater Core - Pressure Test
Use the Pressure Test Kit to perform the pressure test.
1. NOTE: Due to space limitations, a bench test may be necessary for pressure testing.
Clamp off the heater hoses.
2. Disconnect the heater water hoses from the heater core.
3. Install a short piece of heater hose, approximately 101 mm (4 in) long on each heater core tube.
4. Fill the heater core and heater water hoses with water and install Plug BT-7422-B and Adapter BT-7422-A from the Pressure Test Kit in the heater
water hose ends. Secure the heater water hoses, plug and adapter with hose clamps.
5. Attach the pump and gauge assembly from the Pressure Test Kit to the adapter.
6. Close the bleed valve at the base of the gauge. Pump 138 kPa (20 psi) of air pressure into the heater core.
7. Observe the pressure gauge for a minimum of 3 minutes.
8. If the pressure drops, check the heater water hose connections to the core tubes for leaks. If the heater water hoses do not leak, remove the heater
core from the vehicle and perform the bench test. See: Heater Core - Bench Test
