XJ-6 L6-4.2L (1983)
Heater Control Valve: Testing and Inspection
Water Control Valve
- Apply a vacuum to valve. Observe movement of linkage. Should maintain vacuum until released.
- In full heating mode, feel both inlet and outlet hoses for equal temperature.
- Vacuum supply pipe color code = Red at inner vacuum switch on camshaft
- No vacuum in fully open position.