G 20 Van V6-262 4.3L VIN Z (1993)
Thermostatic Air Cleaner: Testing and Inspection
SYSTEM CHECK
Results of Incorrect THERMAC Operation May Cause hesitation during warm up, check for:
^
Heat stove tube disconnected.
^
Damper door does not move (stuck closed).
^
Missing air cleaner to TBI unit seal.
^
Missing air cleaner cover seal or loose cover.
^
Loose air cleaner.
Lack of power, sluggish, pinging or spongy, on a hot engine check for:
^
Damper door does not open to outside air.
Air Cleaner Functional Check
1.
Remove air cleaner assembly and cool to below 40 degrees FAHRENHEIT. The damper should be closed to outside air.
2.
Check for presence and condition of air cleaner to throttle body gasket.
3.
Reinstall air cleaner and be sure heat stove tube is connected at air cleaner snorkel and exhaust manifold.
4.
Start engine. Watch damper door in air cleaner snorkel. As air cleaner warms up, damper door should open slowly to outside air.
5.
If air cleaner fails to operate as described, be sure calibrated spring is properly installed and damper is not binding. If OK, replace wax pellet
actuator assembly.
