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Home >> Cadillac >> 2021 >> CT4 V, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L (L3B) - Repair Instructions - Ct4 (4 Of 6) >> Lower Crankcase Extension Replacement (AWD) >> Cleaning and Inspection Procedure - Required

Cleaning and Inspection Procedure - Required

  1. GM5044132Courtesy of GENERAL MOTORS COMPANY

    Clean the automatic transmission flex plate (1) in solvent.

    2. WARNING:

    Refer to SAFETY GLASSES AND COMPRESSED AIR WARNING

  2. Dry the automatic transmission flex plate with compressed air.
  3. Inspect the automatic transmission flex plate for the following conditions:
    1. Stress cracks around the automatic transmission flex plate-to-torque converter mounting bolt hole locations (1) and/or automatic transmission flex plate-to-crankshaft (2, 4)
      2. NOTE:

      Do not attempt to repair the welded areas that retain the ring gear to the automatic transmission flex plate. Install a NEW automatic transmission flex plate.

    2. Cracks at welded areas that retain the ring gear onto the automatic transmission flex plate (3)
    3. Damaged or missing ring gear teeth (5)
  4. If any of the above conditions exist, replace the automatic transmission flex plate.
  5. GM5863012Courtesy of GENERAL MOTORS COMPANY

    Clean the balancer chain (1) in solvent.

    6. WARNING:

    Refer to SAFETY GLASSES AND COMPRESSED AIR WARNING

  6. Dry the balancer chain with compressed air.
  7. Inspect the balancer chain for signs of excessive wear, chipping, or seizure of the balancer chain links.
  8. Replace the balancer chain if damaged.
  9. GM5896865Courtesy of GENERAL MOTORS COMPANY

    Clean the balancer shaft driven sprocket (1) in solvent.

    10. WARNING:

    Refer to SAFETY GLASSES AND COMPRESSED AIR WARNING

  10. Dry the balancer shaft driven sprocket with compressed air.
  11. Inspect the balancer shaft driven sprocket for the following conditions:
    1. Grooves, excessive wear, chipping of the gear or missing gear teeth (2)
    2. Damage or wear to the bolt hole (3)
  12. If any of the above conditions exist, replace the balancer shaft driven sprocket.
  13. GM5896864Courtesy of GENERAL MOTORS COMPANY

    Clean the balancer chain tensioner (1) in solvent.

  14. Clean out debris from the bolt holes.
    15. WARNING:

    Refer to SAFETY GLASSES AND COMPRESSED AIR WARNING

  15. Dry the balancer chain tensioner with compressed air.
  16. Inspect the balancer chain tensioner for the following conditions:
    1. Damage or wear to the body (1)
    2. Cracking or wear on the chain guide (2)
    3. Wear exceeding 1.12 mm (0.045 in) of depth on the chain guide surface (2)
    4. Damage or wear to the plunger (3)
    5. Damage or wear to the bolt holes (4)
  17. If any of the above conditions exist, replace the balancer chain tensioner.
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