GMC Powertrain 4.3 L, Service Manual, Page: 97 / 196

Engine Marine/Industrial 4.3L 6-87
2000 Marine/Industrial
381965
64126
188086
3. Inspect the engine flywheel (automatic transmission) (if
equipped) for the following:
• Stress cracks around the engine flywheel-to-torque
converter bolt hole locations (1)
• Missing balance weights
• Stress cracks around the engine flywheel-to-crankshaft
bolt hole locations (2) or (3)
Important: Do not attempt to repair the welded areas (if present)
that retain the ring gear to the engine flywheel plate. Always install
a NEW engine flywheel.
• Welded areas that retain the ring gear onto the engine
flywheel for cracking (4) (if present)
• Damaged ring gear teeth (5)
4. Inspect the engine flywheel (manual transmission) (if
equipped) for loose or improperly installed flywheel weights
(if applicable).
A properly installed flywheel weight should be installed until
flush or below flush with the face of the engine flywheel.
5. Inspect the engine flywheel (manual transmission) (if
equipped) for the following:
• Pitted friction 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 the ring gear should be positioned
completely flat against the flange of the engine flywheel.