Flywheel: Service and Repair

2012 Chevrolet Colorado 4WD V8-5.3LSECTION Service and Repair



Engine Flywheel Replacement

Removal Procedure




1. Remove the transmission. Refer to Transmission Replacement (2WD 2.9L and 3.7L) Transmission ReplacementTransmission Replacement (4WD 2.9L and 3.7L) Transmission ReplacementTransmission Replacement (4WD 5.3L) Transmission Replacement.
Note: Note the position and direction of the engine flywheel before removal.

2. Remove the engine flywheel bolts.
3. Remove the engine flywheel.
4. Clean and inspect the engine flywheel. Refer to Automatic Transmission Flex Plate Cleaning and Inspection 33. Automatic Transmission Flex Plate Cleaning and Inspection.

Installation Procedure

Note: The flywheel does not use a locating pin for alignment and will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a three stage tightening process.




1. Install the engine flywheel to the crankshaft.
2. Apply threadlock to the threads of the flywheel bolts. Refer to Adhesives, Fluids, Lubricants, and Sealers Adhesives, Fluids, Lubricants, and Sealers for the correct part number.





Caution: Refer to Fastener Caution Fastener Caution.

3. Install the engine flywheel bolts.

* Tighten the bolts a first pass in sequence to 20 Nm (15 lb ft).
* Tighten the bolts a second pass in sequence to 50 Nm (37 lb ft).
* Tighten the bolts a final pass in sequence to 100 Nm (74 lb ft).

4. Install the transmission. Refer to Transmission Replacement (2WD 2.9L and 3.7L) Transmission ReplacementTransmission Replacement (4WD 2.9L and 3.7L) Transmission ReplacementTransmission Replacement (4WD 5.3L) Transmission Replacement.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.