Engine Flywheel Cleaning and Inspection for GMC Truck GMC Sierra Denali 2006

Engine Flywheel Cleaning and Inspection Automatic Transmission

1. Clean the flex plate in solvent.

Caution: Wear safety glasses in order to avoid eye damage.

2. Dry the flex plate with compressed air.



3. Inspect the flex plate for the following conditions:

•	Stress cracks around the engine flex plate-to-torque converter mounting bolt hole locations (1) and/or engine flex plate-to-crankshaft (2, 3)

Important: Do not attempt to repair the welded areas that retain the ring gear to the flex plate. Install a new flex plate.

•	Cracks at welded areas that retain the ring gear onto the flex plate (4)

•	Damaged or missing ring gear teeth (5)

Engine Flywheel Cleaning and Inspection Manual Transmission

Important: In order to maintain the proper component balance, contact surface taper, and heat transfer, manual transmission flywheels are NOT to be machined.

1. Clean the engine flywheel in solvent.

Caution: Wear safety glasses in order to avoid eye damage.

2. Dry the engine flywheel with compressed air.



3. Inspect the manual transmission engine flywheel for the following conditions:

•	Pitted surface (1)

•	Scoring or grooves (2)

•	Rust or other surface damage (3)

•	Damaged ring gear teeth (4)

•	Loose or improperly positioned ring gear

•	The ring gear has an interference fit onto the engine flywheel and should be positioned completely against the flange of the engine flywheel.