Contour L4-122 2.0L CNG DOHC VIN Z SFI (1996)
Heater Core: Testing and Inspection
Leak /Pressure Test
PRESSURE TEST
Use Rotunda Radiator/Heater Core Pressure Tester 014-R1052 or equivalent to perform pressure test.
1. Drain the coolant from the cooling system.
NOTE: Due to space limitations in the engine compartment, a bench test is recommended for heater core pressure testing.
2. Disconnect the heater water hoses from the heater core tubes.
3. Install a short piece of heater water hose, approximately 101 mm (4 inches) long, on each heater core tube.
4. Fill the heater core and heater water hoses with water and install Plug and Adapter from Rotunda Radiator/Heater Core Pressure Tester
014-R1052 or equivalent in the heater water hose ends. Secure the heater water hoses. plug and adapter with hose clamps tightened to 1.7-2.4
N.m (15-21 Lb-In).
5. Attach the pump and gauge assembly from Rotunda Radiator/Heater Core Pressure Tester 014-R1052 or equivalent to the adapter.
6. Close the bleed valve at the base of the gauge and pump 207 kPa (30 psi) of air pressure into the heater core.
7. Observe the pressure gauge for a minimum of three minutes. The pressure should not drop.
8. If the pressure does not drop, no leaks are indicated.
9. If the pressure drops, check the hose connections to the core tubes for leaks. If the hoses do not leak, remove the heater core from the vehicle
and bench test the heater core.
