Heater Core - Bench Test
WARNING: This page is about a different car, the 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the heater core from the vehicle. For additional information, refer to HEATING & VENTILATION .
- Drain all of the coolant from the heater core.
- Connect the 101 mm (4 inch) test heater water hoses with plug and adapter to the core tubes. Then connect the Radiator/Heater Core Pressure Tester to the adapter.
- Apply 241 kPa (35 psi) of air pressure to the heater core. Submerge the heater core in water.
- If a leak is observed, replace the heater core.