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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 (RWD) >> Removal Procedure

Removal Procedure

NOTE:

Vehicle alignment is not required if the cradle is being lowered or dropped to perform another procedure. This vehicle is equipped with a cradle to body aligning feature: cradle to body through holes or self-aligning pins that are part of the cradle or body. Only align if replacing the cradle with a NEW part and transferring components.

  1. Remove the transmission. Transmission Replacement (All Wheel Drive) , or Transmission Replacement (Rear Wheel Drive)
  2. Lower the drivetrain and front suspension frame assembly. Transmission Replacement (All Wheel Drive) , or Transmission Replacement (Rear Wheel Drive)
  3. GM5150614Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The timing pin (3) is installed into the flexplate for engine timing procedures, it can be damaged if torque is applied to the flexplate with the timing pin engaged. The pin must be placed in the retracted position before torque is applied to the flexplate.

    Install the EN-52476  Flywheel Lock and Alignment Tool (1) through the starter mounting hole.

  4. GM5517309Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Flex Plate Bolt (1) - Remove and DISCARD [8x]

  5. Automatic Transmission Flex Plate (2) - Remove
  6. GM5140979Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Position Sensor Reluctor Ring (1) - Remove

  7. Flywheel Locating Pin (2) - Remove
  8. GM5144281Courtesy of GENERAL MOTORS COMPANY

    Hose Clamp (1) - Disengage [2x] - Hose Clamp Replacement Guidelines - Spring Type

  9. Engine Oil Cooler Coolant Outlet Hose (2) @ Engine Oil Cooler - Remove
  10. Engine Oil Cooler Coolant Inlet Hose (3) @ Engine Oil Cooler - Remove
  11. GM5144284Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler Bolt (1) - Remove [4x]

  12. GM5144290Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler - (1) Remove

  13. Engine Oil Cooler Seal (2) - Remove and DISCARD [2x]
  14. GM5159583Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Oil Pump Flow Control Solenoid Valve Harness (2) - Disconnect

  15. GM5159585Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) @ Lower Crankcase Extension (2) Unclip

  16. GM5138393Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Temperature Sensor (1) - Disconnect

  17. Oil Filter Adapter Bolt (2) - Remove [4x]
  18. GM5138395Courtesy of GENERAL MOTORS COMPANY

    Oil Filter Adapter (1) - Remove

  19. Oil Filter Adapter Gasket (2) - Remove and DISCARD
  20. GM5893535Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket Bolt (1) - Remove and DISCARD [2x]

  21. GM5893533Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket Bolt (1) - Remove and DISCARD [2x]

  22. GM5893532Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket (1) - Remove

  23. GM5511921Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect

  24. GM5511922Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Position Sensor Bracket Bolt (1) - Remove

  25. Crankshaft Position Sensor (2) - Remove
  26. GM5004098Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Rear Oil Seal Housing Bolt (1) - Remove [14x]

  27. Crankshaft Rear Oil Seal Housing (2) - Remove and DISCARD
  28. Crankshaft Rear Oil Seal Housing Locating Pin (3) - Remove [2x]
  29. Clean out the crankshaft rear oil seal housing pin bores with low VOC brake clean and dry with shop air.
  30. GM5153596Courtesy of GENERAL MOTORS COMPANY

    Compress the balancer chain tensioner (1).

  31. EN-52593  Chain Tensioner Retention Pin (2) - Install
  32. GM5153597Courtesy of GENERAL MOTORS COMPANY

    Balancer Chain Tensioner Bolt (1) - Remove [2x]

  33. Balancer Chain Tensioner (2) - Remove
  34. GM5153224Courtesy of GENERAL MOTORS COMPANY

    Balancer Shaft Sprocket Bolt (1) - Remove and DISCARD

  35. Balancer Shaft Driven Sprocket (2) - Remove
  36. Balancer Chain (3) - Remove
  37. GM5153495Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Guide Bolt (2) - Remove [2x]

  38. Balancer Chain Guide (3) - Remove
  39. GM5898220Courtesy of GENERAL MOTORS COMPANY

    Lower Oil Pan Bolt (1) - Remove [20x]

  40. NOTE:

    Do not pry on the oil pan to lower crankcase extension as the sealing surface will become damaged.

  41. Locate the four threaded insert jack screw locations on the lower oil pan. Use four lower oil pan bolts in these locations, and tighten the bolts by hand 1 to 2 turn each in a uniform manner, rotating between bolts until the oil pan has full separation from the lower crankcase extension.
  42. Oil Pan (2) - Remove and DISCARD
  43. GM5517356Courtesy of GENERAL MOTORS COMPANY

    Oil Pump Suction Pipe Bolt (1) - Remove

  44. Oil Pump Suction Pipe (2) - Remove
  45. Oil Pump Suction Pipe Gasket (3) - Remove and DISCARD
  46. GM5517355Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect

  47. GM5004110Courtesy of GENERAL MOTORS COMPANY

    Lower Crankcase Extension Bolt (1) - Remove

  48. Lower Crankcase Extension Bolt (2) - Remove [10x]
  49. Lower Crankcase Extension Bolt (3) - Remove [5x]
  50. CAUTION:

    Use a plastic pry tool when prying case halves apart to prevent damage to the Upper and Lower Crankcase surface. Do not continue to push the pry tool in the crankcase as the Upper and Lower Crankcase halves separate. This may damage the sealing surface.

  51. Lower Crankcase Extension (4) - Remove