Engine Flywheel Replacement

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Flywheel With Flywheel Bolt Tightening Sequence

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedure Remove Clutch Assembly. Refer to Clutch Assembly Replacement (M3L Transmission)
1	Engine Flywheel Bolt (Qty: 8) CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. NOTE: Fasteners have adhesive patch and must be tightened to final torque within 5 minutes. Procedure Install the NEW bolts loosely by hand. If necessary, remove EN-51701-2 holder and rotate the secondary mass using EN-51701-1 aligner and a breaker bar to align the holes in the secondary mass with the primary mass. To prevent crankshaft rotation, install EN-50792 holding tool and starter motor bolts at the starter motor location, engaging the flywheel. Tighten the bolts evenly using the following procedure: Tighten CAUTION: Refer to Fastener Caution . Tighten the bolts a first pass in sequence to 30 N.m (22 lb ft). Tighten the bolts a final pass in sequence 80 degrees using the EN-45059 meter. Special Tools EN-45059 Angle Meter EN-50792 Flywheel Holding Tool EN-51701 Flywheel Aligner and Holder Equivalent regional tools: Special Tools
2	Engine Flywheel Procedure Clean and inspect flywheel. Engine Flywheel Cleaning and Inspection NOTE: EN-51701-2 holder and EN-51701-1 aligner may be installed on the flywheel to maintain alignment of the secondary mass to the primary mass. Special Tools EN-51701 Flywheel Aligner and Holder Equivalent regional tools: Special Tools

Callout

Component Name

Preliminary Procedure
Remove Clutch Assembly. Refer to Clutch Assembly Replacement (M3L Transmission)

Engine Flywheel Bolt (Qty: 8)

CAUTION:

This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

NOTE:

Fasteners have adhesive patch and must be tightened to final torque within 5 minutes.

Procedure

Install the NEW bolts loosely by hand. If necessary, remove EN-51701-2 holder and rotate the secondary mass using EN-51701-1 aligner and a breaker bar to align the holes in the secondary mass with the primary mass.
To prevent crankshaft rotation, install EN-50792 holding tool and starter motor bolts at the starter motor location, engaging the flywheel.
Tighten the bolts evenly using the following procedure:
Tighten
1. Tighten the bolts a first pass in sequence to 30 N.m (22 lb ft).
2. Tighten the bolts a final pass in sequence 80 degrees using the EN-45059 meter.

Special Tools

EN-45059 Angle Meter
EN-50792 Flywheel Holding Tool
EN-51701 Flywheel Aligner and Holder

Equivalent regional tools: Special Tools

Engine Flywheel
Procedure
Clean and inspect flywheel. Engine Flywheel Cleaning and Inspection

NOTE:

EN-51701-2 holder and EN-51701-1 aligner may be installed on the flywheel to maintain alignment of the secondary mass to the primary mass.

Special Tools
EN-51701 Flywheel Aligner and Holder
Equivalent regional tools: Special Tools