Buick Regal Owners & Service Manuals

Buick Regal: Engine Replacement

Removal Procedure

1. Upper Intermediate Steering Shaft - Remove.

2. Recover the refrigerant. Refrigerant Recovery and Recharging (R-1234yf).

3. Drain the coolant. Cooling System Draining and Filling (Static) Cooling System Draining and Filling (GE 47716).

4. Engine Control Module - Remove.

5.

Engine Mechanical - 2.0L (LTG)

Retaining Tab (2) - Unclip [2x].

6. Battery Distribution Fuse Block Cover (1) - Remove.

7.

Engine Mechanical - 2.0L (LTG)

Retainer (2) - Unclip.

8. Battery Positive Cable Nut (1) - Remove.

9.

Engine Mechanical - 2.0L (LTG)

Battery Hold Down Retainer Nut (1) - Remove.

10. Battery Hold Down Bolt (2, 4) - Remove [2x].

11. Battery Hold Down Retainer (6) - Remove.

12. Wiring Harness Retainer (3) - Unclip.

13. Disconnect the electrical connector. (5)

14.

Engine Mechanical - 2.0L (LTG)

Remove the battery. (2) Battery Replacement (2.0L LTG) 15.

Engine Mechanical - 2.0L (LTG)

Remove the battery tray. (2) Battery Tray Replacement.

16. Engine Wiring Harness Junction Block - Remove.

17.

Engine Mechanical - 2.0L (LTG)

Ground Cable Nut (2) - Remove.

18. Wiring Harness Retainer (1, 4, 5) - Remove [4x].

19. Electrical Connector (3) - Unclip.

20.

Engine Mechanical - 2.0L (LTG)

Ground Cable Bolt (1) - Remove.

21.

Engine Mechanical - 2.0L (LTG)

Disconnect the electrical connector. (1)

22.

Engine Mechanical - 2.0L (LTG)

NOTE: The Positive Crankcase Ventilation (PCV) tube has a tamper-proof fitting and cannot be disconnected without damage to the PCV tube. Only disconnect the PCV tube if replacing the air cleaner outlet duct. If repositioning the air cleaner outlet duct, leave the PCV tube connected.

Air Cleaner Outlet Duct (3) - Remove.

23.

Engine Mechanical - 2.0L (LTG)

Air Cleaner Assembly (1) - Remove.

24.

Engine Mechanical - 2.0L (LTG)

Engine Coolant Air Bleed Hose (3) - Remove.

25. Fuel Feed Front Pipe - Remove.

26.

Engine Mechanical - 2.0L (LTG)

Evaporative Emission Front Pipe (2) @ Evaporative Emission Canister Purge Solenoid Valve (1) - Disconnect.

27. Close all connections with EN-6015 plugs.

28.

Engine Mechanical - 2.0L (LTG)

Electrical Connector (1) @ Intake Air Pressure and Temperature Sensor (2) - Disconnect.

29.

Engine Mechanical - 2.0L (LTG)

Charge Air Cooler Outlet Air Tube Fastener (1) - Remove.

30. Retainer Spring (2) - Release.

31. Charge Air Cooler Outlet Air Tube (3) - Disconnect.

32.

Engine Mechanical - 2.0L (LTG)

Range Selector Lever Cable (1) @ Range Selector Lever Cable Lever (4) - Remove - Use a suitable tool.

33. Range Selector Lever Cable (1) @ Transmission Range Selector Lever Cable Bracket (2) - Remove.

Push the lashes (3) in direction of arrow to release the range selector lever cable from the bracket.

34.

Engine Mechanical - 2.0L (LTG)

Power Brake Booster Vacuum Pipe (1) - Disconnect.

35.

Engine Mechanical - 2.0L (LTG)

Clamp (2, 4, 7) - Remove [3x].

36. Radiator Inlet Hose (1) @ Water Outlet (3) - Disconnect.

37. Heater Inlet Hose (5) @ Water Outlet (3) - Disconnect.

38. Heater Outlet Hose (6) @ Water Outlet (3) - Disconnect.

39.

Engine Mechanical - 2.0L (LTG)

Clamp (1) - Remove.

40. Radiator Outlet Hose (2) - Disconnect.

41.

Engine Mechanical - 2.0L (LTG)

Front Bumper Fascia (1) - Remove.

42.

Engine Mechanical - 2.0L (LTG)

Ground Cable Nut (1) - Remove.

43. Ground Cable (2) - Remove.

44.

Engine Mechanical - 2.0L (LTG)

Charge Air Cooler Inlet Air Tube Bolt (1) - Remove.

45. Warm Up Three-Way Catalytic Converter - Remove.

46.

Engine Mechanical - 2.0L (LTG)

Retainer Spring (2) - Release.

47. Charge Air Cooler Inlet Air Tube (1) - Disconnect.

48.

Engine Mechanical - 2.0L (LTG)

Charge Air Cooler Inlet Air Tube Bolt (2) - Remove.

49. Charge Air Cooler Inlet Air Tube (3) - Remove.

50. Remove and DISCARD the gasket. (1)

51.

Engine Mechanical - 2.0L (LTG)

Retainer Spring (1) - Release.

52. Charge Air Cooler Outlet Air Tube (2) - Remove.

53.

Engine Mechanical - 2.0L (LTG)

Air Conditioning Compressor and Condenser Hose Bolt (1) - Remove.

54. Air Conditioning Compressor and Condenser Hose (2) - Remove.

55. Seal Ring (3) - Remove and DISCARD [2x].

56. Remove the front tire and wheel assemblies.

57.

Engine Mechanical - 2.0L (LTG)

Front Compartment Splash Shield (4) - Remove.

58.

Engine Mechanical - 2.0L (LTG)

Front Compartment Air Deflector (4) - Remove.

59.

Engine Mechanical - 2.0L (LTG)

Propeller Shaft (1) - Remove.

60.

Engine Mechanical - 2.0L (LTG)

Exhaust Front Pipe (1) - Remove.

61.

Engine Mechanical - 2.0L (LTG)

Steering Linkage Outer Tie Rod (3) @ Steering Knuckle - Separate [2x].

62.

Engine Mechanical - 2.0L (LTG)

Stabilizer Shaft Link (2) @ Stabilizer Shaft - Separate [2x].

63.

Engine Mechanical - 2.0L (LTG)

{ If equipped }Front Suspension Automatic Forward Lighting Position Sensor (1) @ Lower Control Arm - Separate [2x].

64.

Engine Mechanical - 2.0L (LTG)

Lower Control Arm (1) @ Steering Knuckle - Separate [2x].

65. Drain the transmission fluid.

66. Power Transfer Unit Case - Remove.

67. Front Wheel Drive Half Shaft - Left Side @ Front Wheel Bearing - Remove.

68.

Engine Mechanical - 2.0L (LTG)

Transmission Fluid Cooler Inlet and Outlet Pipe Nut (3) - Remove.

69. Transmission Fluid Cooler Inlet and Outlet Pipe (1) - Remove.

70. Plug and / or cap the hose and transmission to prevent contamination.

71.

Engine Mechanical - 2.0L (LTG)

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

72.

Engine Mechanical - 2.0L (LTG)

Remove and DISCARD the 4 transmission mount transmission side bolts (1).

73.

Engine Mechanical - 2.0L (LTG)

Front Cradle Brace-Both Sides - Remove - Front Cradle Brace Replacement.

74.

Engine Mechanical - 2.0L (LTG)

NOTE: A second technician is required.

Simplified graphic. Engine/transmission unit is fixed with engine support tool to suspension frame. Suspension frame is supported by centering frame and base frame.

Front Cradle Brace Bolt (1, 2) - Remove [4x].

75. Drivetrain and Front Suspension Cradle Front Bolt (4) - Remove [2x].

76. Front Cradle Mount Bolt Bracket (3) - Remove [2x].

77. Carefully lower the engine table and raise the body on the hoist until the engine/transmission and frame are separated from the vehicle.

Disassemble Procedure

1. Front Wheel Drive Half Shaft-Left Side - Remove.

2.

Engine Mechanical - 2.0L (LTG)

Tension the drive belt tensioner (2) in arrow direction and hold tension.

NOTE: A second technician is required.

3. Drive Belt (1) - Remove.

4. Slowly release the tension on the drive belt tensioner (2).

5.

Engine Mechanical - 2.0L (LTG)

Drive Belt Tensioner Bolt (1) - Remove.

6. Drive Belt Tensioner (2) - Remove.

7. Battery Positive Cable - Remove.

Engine Mechanical - 2.0L (LTG)

Starter (2) - Remove.

9.

Engine Mechanical - 2.0L (LTG)

Air Conditioning Compressor (1) - Remove.

10.

Engine Mechanical - 2.0L (LTG)

Generator (1) - Remove.

11.

Engine Mechanical - 2.0L (LTG)

Engine Wiring Harness (1) - Remove.

12. Install a suitable cable to the 3 engine lift brackets.

13. Install a suitable engine lifting device to the cable.

14. Extend the engine lifting device until the steel cables are slightly tensioned.

15.

Engine Mechanical - 2.0L (LTG)

Remove and DISCARD the transmission front mount bolt (1).

16. Put the engine transmission unit down on a wooden pallet.

17.

Engine Mechanical - 2.0L (LTG)

Torque Converter @ Flex Plate - Loosen

  1. Turn the engine at the crankshaft balancer clockwise with a suitable tool, until a torque converter bolt (1) shows up.
  2. Remove and DISCARD the first torque converter bolt.
  3. Turn the engine at the crankshaft balancer clockwise 60 degrees.
  4. Remove and DISCARD the second torque converter bolt.
  5. Repeat the previous 4 steps for the third torque converter bolt.

18.

Engine Mechanical - 2.0L (LTG)

Transmission Bolt (1) - Remove [2x].

19.

Engine Mechanical - 2.0L (LTG)

Pump and Component Oil Heat Shield Bolt (2) - Remove [2x].

20. Remove the oil pump flow control valve heat shield bolt (3).

21. Oil Pump Flow Control Valve Heat Shield (1) - Remove.

22.

Engine Mechanical - 2.0L (LTG)

Transmission Bolt (1, 2) - Remove [3x].

23.

Engine Mechanical - 2.0L (LTG)

Transmission Bolt (1) - Remove [3x].

24. Wiring Harness Bracket (2) - Remove.

25.

Engine Mechanical - 2.0L (LTG)

NOTE: A second technician is required.

Transmission (1) - Remove.

26. Install the engine to a suitable engine stand.

27. Transfer components as necessary.

Assemble Procedure

1. Remove the engine from the engine stand.

2. Put the engine down on a wooden pallet.

3.

Engine Mechanical - 2.0L (LTG)

NOTE: A second technician is required.

Transmission (1) - Install.

4.

Engine Mechanical - 2.0L (LTG)

CAUTION: Fastener Caution.

Wiring Harness Bracket (2) - Install.

5. Transmission Bolt (1) - Install and tighten [3x]58N.m (43 lb ft).

6.

Engine Mechanical - 2.0L (LTG)

Transmission Bolt (1, 2) - Install and tighten [3x]58N.m (43 lb ft).

7.

Engine Mechanical - 2.0L (LTG)

Oil Pump Flow Control Valve Heat Shield (1) - Install.

8. Install the oil pump flow control valve heat shield bolt (3) and tighten to 58N.m (43 lb ft).

9. Pump and Component Oil Heat Shield Bolt (2) - Install and tighten [2x]9N.m (80 lb in).

10.

Engine Mechanical - 2.0L (LTG)

Transmission Bolt (1) - Remove [2x]58N.m (43 lb ft).

11.

Engine Mechanical - 2.0L (LTG)

Torque Converter @ Flex Plate - Install.

  1. Turn the engine at the crankshaft balance clockwise with a suitable tool, until a torque converter bolt (1) shows up.

NOTE: Service may offer bolts without microencapsulated thread locking adhesive. If this is the case, apply thread locking adhesive to the bolt.

If fasteners are microencapsulated, install NEW torque converter to flexplate bolts. Do NOT reuse the old bolts.

  1.  
  2. Install the first NEW torque converter bolt (1) and tighten to 60N.m (44 lb ft).
  3. Turn the engine at the crankshaft balancer clockwise 60 degrees.
  4. Install the second NEW torque converter bolt and tighten to 60N.m (44 lb ft).
  5. Repeat the previous 4 steps for the third torque converter bolt.

12. Place the engine transmission unit to the suspension frame.

13.

Engine Mechanical - 2.0L (LTG)

Install the NEW transmission front mount bolt and tighten to 100N.m (74 lb ft).

14. Remove the engine lifting device and the cable from the engine.

15.

Engine Mechanical - 2.0L (LTG)

Engine Wiring Harness (1) - Install.

16.

Engine Mechanical - 2.0L (LTG)

Generator (1) - Install - Generator Replacement (2.0L LTG).

17.

Engine Mechanical - 2.0L (LTG)

Air Conditioning Compressor (1) - Install.

18.

Engine Mechanical - 2.0L (LTG)

Starter (2) - Install.

19. Battery Positive Cable - Install.

20.

Engine Mechanical - 2.0L (LTG)

Drive Belt Tensioner (1) - Install.

21. Drive Belt Tensioner Bolt (2) - Install and tighten58N.m (43 lb ft).

22.

Engine Mechanical - 2.0L (LTG)

Tension the drive belt tensioner (2) in arrow direction and hold tension.

NOTE: A second technician is required.

23. Drive Belt (1) - Remove.

24. Slowly release the tension on the drive belt tensioner (2).

25. Front Wheel Drive Half Shaft @ Transmission - Install.

Installation Procedure

1.

Engine Mechanical - 2.0L (LTG)

NOTE:

  • A second technician is required.
  • Simplified graphic. Engine/transmission unit is fixed with engine support tool to suspension frame. Suspension frame is supported by centering frame and base frame.
  • During the tightening procedure check that the pins (7) slide easily in their holes.

Raise the drivetrain and front suspension frame (5) and install it with the engine transmission to the vehicle.

2. Front Cradle Mount Bolt Bracket (3) - Install [2x].

3. Drivetrain and Front Suspension Cradle Front Bolt (4) - Install and hand tighten [2x].

4. Front Cradle Brace Bolt (1, 2) - Install and hand tighten [4x].

5. Front Cradle Brace (9) - Install [2x].

6. Drivetrain and Front Suspension Cradle Rear Bolt (8) - Install and hand tighten [2x].

7. Front Cradle Brace Bolt (6, 10, 11) - Install and hand tighten [4x].

8. Install the 2 CH - 51034 pins (7) to arrange the front suspension frame during tightening.

9. Make sure that the drivetrain and front suspension frame (5) fits closely to the vehicle.

10. Make sure that the 2 CH - 51034 pins (7) fit closely to the drivetrain and front suspension frame (5).

11. Drivetrain and Front Suspension Cradle Front Bolt (4) - Tighten [2x]160N.m (118 lb ft).

12. Drivetrain and Front Suspension Cradle Rear Bolt (8) - Tighten [2x]160N.m (118 lb ft).

13. Front Cradle Brace Bolt (1, 2) - Tighten [4x]58N.m (43 lb ft).

14. Front Cradle Brace Bolt (6, 10, 11) - Tighten [4x]58N.m (43 lb ft).

15. Remove the 2 CH - 51034 pins (7) to arrange the front suspension frame during tightening.

16. Lower the vehicle.

17.

Engine Mechanical - 2.0L (LTG)

CAUTION: Torque-to-Yield Fastener Caution

Transmission Mount Bolt (1) - Install and tighten the NEW bolt. [4x]

  1. First Pass: 100N.m (74 lb ft)
  2. Final Pass: 60 - 75 degrees - Use the special tool: EN-45059 Angle Meter

18.

Engine Mechanical - 2.0L (LTG)

CAUTION: Torque-to-Yield Fastener Caution.

Engine Mount Bolt (1) - Install and tighten the NEW bolt. [2x].

  1. First Pass: 100N.m (74 lb ft).
  2. Final Pass: 60 - 75 degrees - Use the special tool: EN-45059 Angle Meter

19. Raise the vehicle.

20. Remove the plugs and / or caps from the hose and transmission.

21.

Engine Mechanical - 2.0L (LTG)

Transmission Fluid Cooler Inlet and Outlet Pipe (1) - Install.

22. Transmission Fluid Cooler Inlet and Outlet Pipe Nut (3) - Install and tighten10N.m (89 lb in).

23. Power Transfer Unit Case - Install.

24. Front Wheel Drive Half Shaft - Left Side @ Front Wheel Bearing - Install.

25.

Engine Mechanical - 2.0L (LTG)

Lower Control Arm (1) @ Steering Knuckle - Install [2x].

26.

Engine Mechanical - 2.0L (LTG)

{ If equipped }Front Suspension Automatic Forward Lighting Position Sensor (1) @ Lower Control Arm - Install [2x].

27.

Engine Mechanical - 2.0L (LTG)

Stabilizer Shaft Link (2) @ Stabilizer Shaft - Install [2x].

28.

Engine Mechanical - 2.0L (LTG)

Steering Linkage Outer Tie Rod (3) @ Steering Knuckle - Install [2x].

29.

Engine Mechanical - 2.0L (LTG)

Exhaust Front Pipe (1) - Install.

30.

Engine Mechanical - 2.0L (LTG)

Propeller Shaft (1) - Install.

31.

Engine Mechanical - 2.0L (LTG)

Front Compartment Air Deflector (4) - Install.

32.

Engine Mechanical - 2.0L (LTG)

Front Compartment Splash Shield (4) - Install.

33. Tires @ Front - Install.

34.

Engine Mechanical - 2.0L (LTG)

Seal Ring (3) - Install NEW [2x].

35. Air Conditioning Compressor and Condenser Hose (2) - Install.

36. Air Conditioning Compressor and Condenser Hose Bolt (1) - Install and tighten19N.m (14 lb ft).

37.

Engine Mechanical - 2.0L (LTG)

Install a NEW gasket. (2)

38. Install the 2 charge air cooler inlet air tube bolts (3) to the charge air cooler inlet air tube (1) until they snap to the gasket.

39.

Engine Mechanical - 2.0L (LTG)

Charge Air Cooler Inlet Air Tube (1) - Install.

40. Charge Air Cooler Inlet Air Tube Bolt (2) - Install and hand tighten.

41.

Engine Mechanical - 2.0L (LTG)

Charge Air Cooler Outlet Air Tube (2) - Install.

42. Lower the vehicle.

43.

Engine Mechanical - 2.0L (LTG)

Charge Air Cooler Inlet Air Tube Bolt (1) - Install and tighten22N.m (16 lb ft).

44. Raise the vehicle.

45.

Engine Mechanical - 2.0L (LTG)

Charge Air Cooler Inlet Air Tube Bolt (2) - Tighten22N.m (16 lb ft).

46.

Engine Mechanical - 2.0L (LTG)

Charge Air Cooler Inlet Air Tube (1) - Connect.

47. Retainer Spring (2) - Engage.

48. Warm Up Three-Way Catalytic Converter - Install.

49. Lower the vehicle.

50.

Engine Mechanical - 2.0L (LTG)

Ground Cable (2) - Install.

51. Ground Cable Nut (1) - Install and tighten 9N.m (80 lb in).

52.

Engine Mechanical - 2.0L (LTG)

Front Bumper Fascia (1) - Install.

53.

Engine Mechanical - 2.0L (LTG)

Radiator Outlet Hose (2) - Connect.

54. Clamp (1) - Install.

55.

Engine Mechanical - 2.0L (LTG)

Heater Outlet Hose (6) @ Water Outlet (3) - Connect.

56. Heater Inlet Hose (5) @ Water Outlet (3) - Connect.

57. Radiator Inlet Hose (1) @ Water Outlet (3) - Connect.

58. Clamp (2, 4, 7) - Install [3x].

59.

Engine Mechanical - 2.0L (LTG)

Power Brake Booster Vacuum Pipe (1) - Connect.

60. Transmission Fluid - Fill.

61.

Engine Mechanical - 2.0L (LTG)

Range Selector Lever Cable (1) @ Transmission Range Selector Lever Cable Bracket (2) - Install.

Push the range selector lever cable into the bracket.

62. Range Selector Lever Cable (1) @ Range Selector Lever Cable Lever (4) - Install - Use a suitable tool.

63.

Engine Mechanical - 2.0L (LTG)

Charge Air Cooler Outlet Air Tube (3) - Connect.

64. Retainer Spring (2) - Install.

65. Charge Air Cooler Outlet Air Tube Fastener (1) - Install and tighten 22N.m (16 lb ft).

66.

Engine Mechanical - 2.0L (LTG)

Electrical Connector (1) @ Intake Air Pressure and Temperature Sensor (2) - Connect.

67.

Engine Mechanical - 2.0L (LTG)

Remove the EN-6015 plugs from all connections.

68. Evaporative Emission Front Pipe (2) @ Evaporative Emission Canister Purge Solenoid Valve (1).

69. Fuel Feed Front Pipe - Install.

70.

Engine Mechanical - 2.0L (LTG)

Engine Coolant Air Bleed Hose (3) - Install.

71.

Engine Mechanical - 2.0L (LTG)

Air Cleaner Assembly (1) - Install.

72.

Engine Mechanical - 2.0L (LTG)

NOTE: The Positive Crankcase Ventilation (PCV) tube has a tamper-proof fitting and cannot be disconnected without damage to the PCV tube. Only disconnect the PCV tube if replacing the air cleaner outlet duct. If repositioning the air cleaner outlet duct, leave the PCV tube connected.

Air Cleaner Outlet Duct (3) - Install - Air Cleaner Outlet Duct Replacement.

73.

Engine Mechanical - 2.0L (LTG)

Connect the electrical connector. (1)

74.

Engine Mechanical - 2.0L (LTG)

Ground Cable Bolt (1) - Install and tighten9N.m (80 lb in).

75.

Engine Mechanical - 2.0L (LTG)

Electrical Connector (3) - Install.

76. Wiring Harness Retainer (1, 4, 5) - Install [4x].

77. Ground Cable Nut (2) - Install and tighten 9N.m (80 lb in).

78. Engine Wiring Harness Junction Block - Install.

79.

Engine Mechanical - 2.0L (LTG)

Install the battery tray. (2) Battery Tray Replacement.

80.

Engine Mechanical - 2.0L (LTG)

Install the battery. (2) Battery Replacement (2.0L LTG).

81.

Engine Mechanical - 2.0L (LTG)

Connect the electrical connector. (5)

82. Wiring Harness Retainer (3) - Install.

83. Battery Hold Down Retainer (6) - Install.

84. Battery Hold Down Bolt (2, 4) - Install and tighten [2x] 9N.m (80 lb in).

85. Battery Hold Down Retainer Nut (1) - Install and tighten 9N.m (80 lb in).

86.

Engine Mechanical - 2.0L (LTG)

Battery Positive Cable Nut (1) - Install and tighten16N.m (12 lb ft).

87. Retainer (2) - Install.

88.

Engine Mechanical - 2.0L (LTG)

Battery Distribution Fuse Block Cover (1) - Install.

89. Retaining Tab (2) - Install [2x].

90. Recharge the refrigerant.

91. Coolant - Fill.

92. Engine Oil - Fill.

93. Upper Intermediate Steering Shaft - Install.

94. Perform the crankshaft position variation learn.

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