Engine Flywheel Installation (LF4)

Special Tools

• EN-46106  Flywheel Holding Tool
• EN-45059  Torque Angle Meter

For equivalent regional tools, refer to Special Tools (LF4) .

Fig 1: Flywheel And Bolts
Courtesy of GENERAL MOTORS COMPANY
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:

The flywheel does not use a locating pins for alignment and will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flywheel bolts.

1. Install the flywheel (1) to the crankshaft.
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.

2. Install and hand tighten the NEW flywheel bolts (2).
Fig 2: Flywheel Holding Tool
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Refer to Fastener Caution .

3. Install the EN-46106  and bolts.
Fig 3: Flywheel Bolt Tightening Sequence
Courtesy of GENERAL MOTORS COMPANY
4. Tighten the flywheel bolts (1).
   1. Tighten the bolts (1-8) a first pass in sequence to 30 N.m (22 lb ft).
   2. Tighten the bolts (1-8) a final pass in sequence an additional 60 degrees using EN-45059  .
5. Remove the EN-46106  .