Engine Flywheel Cleaning and Inspection L98, LS2

Caution: Refer to Safety Glasses Caution in the Preface section.




1. Clean the automatic transmission flex plate in solvent.
2. Dry the flex plate with compressed air.

Important: Do not attempt to repair the welded areas that retain the ring gear to the flex plate. If any of the following conditions are found, install a new flex plate.

3. Inspect the flex plate for the following conditions:

•	Damaged ring gear teeth (1).

•	Elongations of the crankshaft or torque converter bolt holes (2).

•	Stress cracks around the flex plate-to-crankshaft retaining bolt hole locations (3).

•	Cracks between the pressing holes (4).

•	Welded areas that retain the ring gear onto the flex plate for cracking.

Engine Flywheel Cleaning and Inspection LS3

1. Clean the flex plate in solvent.
2. Dry the flex plate with compressed air.
3. Inspect the automatic transmission flex plate for the following conditions:

•	Loose or missing bolts/nuts (1, 2)

•	Damaged splines (3)

•	Damaged ring gear teeth (4)

•	Stress cracks around the flex plate-to-crankshaft bolt hole locations





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

4. Inspect the manual transmission flywheel for the following conditions:

•	Pitted surface (1)

•	Grooved or scored surface (2)

•	Rusted surface (3)

•	Damaged ring gear teeth (4)

•	Loose or improperly positioned ring gear

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

•	Missing, bent or damaged pressure plate locating pins

•	The 2 locating pins are installed into the flywheel and spaced 170 degrees apart to ensure proper orientation of the clutch pressure plate to the engine flywheel during assembly.