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

Installation Procedure

  1. GM5932173Courtesy of GENERAL MOTORS COMPANY

    Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant

  2. Clean the engine block sealing surface and ensure the bolt threads are free of RTV and debris prior to RTV bead application.
  3. Clean the lower crankcase extension housing and ensure the housing is free of oils and finger prints prior to RTV bead application.
    4. NOTE:

    DO NOT allow the RTV to skim over, the crankcase extension housing must be installed within 8 minutes of RTV being applied.

  4. Apply a 4 mm bead of sealant (1) to the crankshaft rear oil seal housing.
  5. Apply 6 mm bead of sealant to the locations indicated, dimension a.
  6. GM5932171Courtesy of GENERAL MOTORS COMPANY

    Oil Pan High Pressure Port Seal (2) - Install NEW

  7. Lower Crankcase Extension (1) - Install
  8. GM5932169Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution

    Lower Crankcase Extension Bolt (1) - Install and tighten in sequence - Fastener Specifications

  9. Lower Crankcase Extension Bolt (2) - Install and tighten in sequence - Fastener Specifications
  10. Lower Crankcase Extension Bolt (3) - Install and tighten in sequence - Fastener Specifications
  11. Lower Crankcase Extension Bolt (4) - Install and tighten in sequence [8x] - Fastener Specifications
  12. Lower Crankcase Extension Bolt (5) - Install and tighten in sequence [3x] - Fastener Specifications
  13. GM5517318Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler Seal (4) - Install NEW [2x]

  14. Oil Filter Adapter (3) - Install
    15. CAUTION:

    Refer to Fastener Caution

  15. Oil Filter Adapter Bolt (2) - Install and tighten [3x] - Fastener Specifications
  16. Oil Filter Adapter Bolt (1) - Install and tighten - Fastener Specifications
  17. GM5517317Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Temperature Sensor (2) - Install and tighten - Fastener Specifications

  18. Electrical Connector (1) - Connect
  19. GM5902206Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Balancer shaft driven sprocket is keyed to fit one way on the balancer driven shaft.

    Install the balancer chain and balancer shaft driven sprocket to the balancer driven shaft.

    1. Ensure the marks on the balancer driven shaft (2) face each other.
    2. Align the double yellow links (4) on the balancer shaft chain to the double timing marks on the balancer shaft driven sprocket (3).
    3. Align the pink link (1) to the timing mark on the crankshaft sprocket (5).
  20. GM5153224Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to TORQUE-TO-YIELD FASTENER CAUTION .

    Balancer Shaft Sprocket Bolt (1) - Install NEW and tighten - Fastener Specifications

  21. GM5153495Courtesy of GENERAL MOTORS COMPANY

    Balancer Chain Guide (3) - Install

  22. Timing Chain Guide Bolt (2) - Install and tighten [2x] - Fastener Specifications
  23. GM5573763Courtesy of GENERAL MOTORS COMPANY

    If the balancer chain tensioner (1) needs to be assembled, install the check ball spring (2), plunger orifice (3), main spring (4) and the plunger (5). then install the EN-955-10-A  Locking Pin to reset the tensioner.

  24. GM5153597Courtesy of GENERAL MOTORS COMPANY

    Balancer Chain Tensioner (2) - Install

  25. Balancer Chain Tensioner Bolt (1) - Install and tighten [2x] - Fastener Specifications
  26. GM5153596Courtesy of GENERAL MOTORS COMPANY

    EN-52593  Chain Tensioner Retention Pin (2) - Remove

  27. GM5021095Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Rear Oil Seal Housing Locating Pin (1) - Install [2x]

  28. EN-52483  Cover Installation Guide Pins - Install
  29. GM5045205Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure that the sealing surface is clear of oil, grease and old sealant material.

    NOTE:

    Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant

    NOTE:

    The rear oil seal housing must be installed within 8 minutes of applying the RTV sealant application.

    Apply a bead of room temperature vulcanizing sealant (1) as shown. Adhesives, Fluids, Lubricants, and Sealers

  30. GM5021095Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Leave the seal protector that ships installed onto the NEW crankshaft rear oil seal housing on.

    Install the NEW rear crankshaft rear oil seal housing (2) until the seal protector is flush with the end of the crankshaft.

  31. Press the center of the crankshaft NEW rear oil seal housing in, allowing the crankshaft to push out the seal protector.
  32. DISCARD the seal protector.
  33. Once the NEW rear oil seal housing is completely seated, inspect the seal around the crankshaft to ensure it has not folded over itself.
  34. EN-52483  Cover Installation Guide Pins - Remove
  35. Crankshaft Rear Oil Seal Housing Bolt (1) - Install and hand tighten [14x]
  36. Crankshaft Rear Oil Seal Housing Bolt (1) - Tighten in sequence [14x] - Fastener Specifications
  37. GM5511922Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Position Sensor (2) - Install

  38. Crankshaft Position Sensor Bracket Bolt (1) - Install and tighten - Fastener Specifications
  39. GM5511921Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Connect

  40. GM5517355Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Connect

  41. GM5517356Courtesy of GENERAL MOTORS COMPANY

    Oil Pump Suction Pipe Gasket (3) - Install NEW

  42. Oil Pump Suction Pipe (2) - Install
  43. Oil Pump Suction Pipe Bolt (1) - Install and tighten - Fastener Specifications
  44. GM5389826Courtesy of GENERAL MOTORS COMPANY

    Wipe the oil pan surface with the Adhesion Plastic Pan Primer Promoter using a clean shop towel. Allow the cleaner to flash / evaporate. Wipe off the sealing surfaces with a lint free cloth. Do not touch the sealing surface after cleaning to avoid inducing containment debris to the bonding surface area. Adhesives, Fluids, Lubricants, and Sealers

  45. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
    46. NOTE:

    Do not allow sealant to skim over, the oil pan must be installed within 8 minutes of sealer application.

  46. Apply a 3 mm bead of sealant (1) around the seal bead path, as shown.
  47. GM5654601Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Use the front cradle to rest the oil pan on while feeding the EN-52483  Cover Installation Guide Pins through the oil pan bolt holes in two locations to keep oil pan square and aid in alignment.

    Install EN-52483  Cover Installation Guide Pins in two locations to keep oil pan square and aid in alignment.

  48. GM5389827Courtesy of GENERAL MOTORS COMPANY

    Oil Pan (2) - Install NEW

    49. NOTE:

    Install some lower oil pan bolts to secure the oil pan.

  49. Lower Oil Pan Bolt (1) - Install and hand tighten [4x]
  50. EN-52483  Cover Installation Guide Pins - Remove [2x]
    51. NOTE:

    Install the remaining lower oil pan bolts.

  51. Lower Oil Pan Bolt (1) - Install and hand tighten [13x]
  52. Lower Oil Pan Bolt (1) - Tighten in sequence [17x] - Fastener Specifications
  53. GM5140979Courtesy of GENERAL MOTORS COMPANY

    Flywheel Locating Pin (2) - Install

  54. Crankshaft Position Sensor Reluctor Ring (1) - Install
  55. GM5517309Courtesy of GENERAL MOTORS COMPANY

    Automatic Transmission Flex Plate (2) - Install

    56. NOTE:

    Install NEW bolts. Do NOT reuse old bolts.

  56. If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:
    1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth.
    2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the component. Adhesives, Fluids, Lubricants, and Sealers
    4. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  57. Automatic Transmission Flex Plate Bolt (1) - Install NEW and tighten [8x] - Fastener Specifications
  58. GM5150614Courtesy of GENERAL MOTORS COMPANY

    Remove the EN-52476  Flywheel Lock and Alignment Tool

  59. GM5525793Courtesy of GENERAL MOTORS COMPANY

    Front Wheel Drive Intermediate Shaft Retaining Ring (1) - Install NEW

  60. Apply a small amount of lubricant to the Front Wheel Drive Intermediate Shaft (2) splines. Adhesives, Fluids, Lubricants, and Sealers
  61. Install the Front Wheel Drive Intermediate Shaft (2) into the Front Differential Carrier (3).
  62. GM5525786Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The Front Wheel Drive Intermediate Shaft and Front Differential Carrier are to be installed as a assembly.

    Position and secure the Front Differential Carrier (2) on a transmission jack.

  63. Front Wheel Drive Intermediate Shaft (1) and the Front Differential Carrier (2) - Install
  64. GM5344075Courtesy of GENERAL MOTORS COMPANY

    Front Differential CarrierBolt (1) - Install and hand tighten

  65. GM5344077Courtesy of GENERAL MOTORS COMPANY

    Front Differential CarrierBolt (1) - Install and hand tighten [2x]

  66. Front Differential CarrierBolt (2) - Install and hand tighten
  67. Front Differential CarrierBolt - Tighten [4x] - Fastener Specifications
  68. Remove the transmission jack from the Front Differential Carrier.
  69. Using the engine support fixture, carefully raise the engine assembly to it's original position.
  70. GM5458092Courtesy of GENERAL MOTORS COMPANY

    Front Axle Vent Hose (1) Install

  71. GM5344068Courtesy of GENERAL MOTORS COMPANY

    Front Wheel Drive Intermediate Shaft Bracket (1) - Install

  72. Front Wheel Drive Intermediate Shaft Housing Bolt (2) - Install and tighten [3x] - Fastener Specifications
  73. GM5517315Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket (2) - Install

    74. CAUTION:

    Refer to TORQUE-TO-YIELD FASTENER CAUTION

  74. Engine Mount Bracket Bolt (1) - Install NEW and tighten [4x] - Fastener Specifications
  75. GM5517314Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness (2) - Move into position

  76. Retainer (1) - Install [3x]
  77. GM5344067Courtesy of GENERAL MOTORS COMPANY

    Apply a small amount of lubricant to the front wheel drive intermediate shaft splines. Adhesives, Fluids, Lubricants, and Sealers

  78. Front Wheel Drive Intermediate Shaft Seal (2) - Install NEW
  79. Front Wheel Drive Intermediate Shaft Retaining Ring (1) - Install NEW
  80. GM5341102Courtesy of GENERAL MOTORS COMPANY

    Apply a small amount of grease to the front wheel drive intermediate shaft splines. Adhesives, Fluids, Lubricants, and Sealers

    NOTE:

    Ensure that the front wheel drive half shaft (1) is securely engaged to the front wheel drive intermediate shaft.

    Front Wheel Drive Half Shaft (1) - Install

  81. GM5504544Courtesy of GENERAL MOTORS COMPANY

    Have an assistant apply the brakes.

  82. Front Wheel Drive Shaft Nut (1) - Install NEW and tighten - Fastener Specifications
  83. GM5507536Courtesy of GENERAL MOTORS COMPANY

    Retaining Ring (2) @ Front Wheel Drive Half Shaft (1) - Install NEW

  84. GM5341523Courtesy of GENERAL MOTORS COMPANY

    Front Wheel Drive Half Shaft (1) - Install

  85. GM5341521Courtesy of GENERAL MOTORS COMPANY

    Partially install the Front Wheel Drive Half Shaft (1) into the Front Differential Carrier.

  86. Remove the DT-51504  Seal Protector (2) from the front axle shaft seal.
    87. NOTE:

    Ensure that the front wheel drive half shaft (1) is securely engaged to the front differential carrier.

  87. Completely install the Front Wheel Drive Half Shaft (1) into the Front Differential Carrier.
  88. GM5507500Courtesy of GENERAL MOTORS COMPANY

    Have an assistant apply the brakes.

  89. Front Wheel Drive Shaft Nut (1) - Install NEW and tighten - Fastener Specifications
  90. GM5495033Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket (1) - Install

  91. GM5491651Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to TORQUE-TO-YIELD FASTENER CAUTION

    Engine Mount Bracket Bolt (1) - Install NEW and tighten [4x] - Fastener Specifications

  92. GM5407967Courtesy of GENERAL MOTORS COMPANY

    Water Pump Cover (2) - Install

  93. Water Pump Cover Bolt (1) - Install and tighten [3x] - Fastener Specifications
  94. GM5494001Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Install

  95. Install the drivetrain and front suspension frame assembly. Drivetrain and Front Suspension Cradle Removal and Installation (AWD) , or Drivetrain and Front Suspension Cradle Removal and Installation (RWD)
  96. Install the front differential carrier oil drain plug. FRONT AXLE LUBRICANT REPLACEMENT
  97. Install the transmission. Transmission Replacement (All Wheel Drive) , or Transmission Replacement (Rear Wheel Drive)
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