Montego AWD V6-3.0L VIN 1 (2005)
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.
