Corona L4-2366cc 22R (1982)
Thermal Vacuum Valve: Testing and Inspection
Thermo Switch
1981 22R, 1981-82 3A-C & 3T-C Engine
1. Drain coolant and remove thermo switch.
2. Cool thermo switch to below 127° for 3A-C engine or below 109° F and check that switch has continuity.
3. Heat switch to above 149° F for 3A-C engine or above 131° F and check that there is no continuity.
4. Apply liquid sealer to threads of switch and reinstall it, then refill radiator with coolant.
