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 hoses with plug and adapter to the core tubes. Then connect the Pressure Test Kit 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.