Alignment Procedure
WARNING: This page is about a different car, the 2016 Chevrolet Trax and 2016 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the heater and air conditioning evaporator and blower module assembly (HVAC). Refer to Heater and Air Conditioning Evaporator and Blower Module Removal and Installation .
- Remove the mode control cam. Refer to Mode Control Cam Replacement (C67) .
- Inspect the mode valve levers and internal vent valve operation prior to installing the new mode control cam assembly.
- Replace the components affecting the proper operation of the vent valves.
- Rotate the defrost valve lever (1), vent valve lever (2), and heater valve lever (3) to the position as shown.
- Using a small brush, apply a lithium based lubricant to the channels of the heater cam, and the mode cam where the levers travel.
- Install the heater cam (1) aligning the channel on the back side of the heater cam with the heater valve lever pin (2).
- Inspect the heater valve lever pin (2) is visible in the heater cam (1) inspection window indicated by the arrow.
- Rotate the heater cam (1) counter clockwise, position the larger heater cam female tooth gear as indicated by the arrow.
- Install the mode cam (2) aligning the larger male tooth with the heater cam (1) larger female tooth indicated by the arrows, while aligning the channels on the back side of the mode cam (2) with the defroster valve lever pin (3), and the vent valve lever pin (4). The pins should be visible through the inspection windows.
- Verify that the large male tooth on the mode control cam (2) is aligned with the large female tooth on the heater cam (1).
- Re-install the heater and air conditioning evaporator and blower module assembly (HVAC). Refer to Heater and Air Conditioning Evaporator and Blower Module Removal and Installation .
- Verify for proper operation of the HVAC system.
NOTE:
The HVAC module must be removed to accurately set the mode cam gear timing. Failure to do so may result in poor HVAC performance, and damage to the HVAC module.
NOTE:
If the heater cam and mode cam are not aligned correctly, the mode operation will not function properly.