Sable V6-3.0L VIN U (1999)
Bench Test
Use Rotunda Radiator Pressure Tester 014-R1072 or equivalent to perform bench test.
1. Drain all coolant from the heater core.
2. Remove heater core from the A/C evaporator housing.
3. Connect the 101 mm (4 inch) test heater water hoses with plug and adapter to the core tubes. Then connect the Rotunda Radiator Pressure
Tester 014-R1072 or equivalent to the adapter.
4. Apply 241 kPa (35 psi) of air pressure to the heater core. Submerge the heater core in water.
5. If a leak is observed, service or replace the heater core.
6. Install heater core into A/C evaporator housing.
