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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Mechanical - 1.8L (LUW And LWE)) >> Repair Instructions - On Vehicle >> Cylinder Head Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement (1.8L LUW) and Air Cleaner Assembly Replacement (1.8L LWE) .
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  4. Drain the cooling system. Refer to Cooling System Draining and Filling (GE-47716 Fill) and Cooling System Draining and Filling (Static Fill) .
  5. Drain the engine oil. Refer to Engine Oil and Oil Filter Replacement .
  6. Remove the intake manifold. Refer to Intake Manifold Replacement .
  7. Loosen the radiator inlet hose clamp (2).
    Fig 1: Radiator Inlet Hose And Clamp
    GM2652379Courtesy of GENERAL MOTORS COMPANY
  8. Remove the radiator inlet hose (3) from the engine coolant thermostat (1).
  9. Remove the heater outlet hose from the engine coolant thermostat housing. Refer to Heater Outlet Hose Replacement (1.8L LUW) and Heater Outlet Hose Replacement (1.8L LWE) .
  10. Remove the heater inlet hose from the engine coolant thermostat housing. Refer to Heater Inlet Hose Replacement (1.8L LUW and LWE) .
  11. Disconnect the thermostat wiring harness plug (1).
    Fig 2: Thermostat Housing Bracket, Bolts And Wiring Harness
    GM2699491Courtesy of GENERAL MOTORS COMPANY
  12. Remove the thermostat housing bracket nut (3).
  13. Hang the thermostat housing bracket (2) with attached wiring harness aside.
  14. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement (1.8L LUW and LWE) .
  15. Remove the 2 timing belt upper front cover bolts (2).
    Fig 3: Timing Belt Upper Front Cover
    GM2027572Courtesy of GENERAL MOTORS COMPANY
  16. Remove the timing belt upper front cover (1).
  17. Remove the camshaft cover. Refer to Camshaft Cover Replacement .
  18. Remove the 2 camshaft position sensor. Refer to Camshaft Position Sensor Replacement .
  19. Remove the 2 camshaft position actuator solenoid valve. Refer to Camshaft Position Actuator Solenoid Valve Replacement .
  20. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement .
  21. Set the crankshaft balancer in direction of engine rotation until the markings (1) line up with the cylinder 1 at TDC.
    Fig 4: View Of Crankshaft TDC Position
    GM1936993Courtesy of GENERAL MOTORS COMPANY
  22. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement (Automatic Transmission)  and Crankshaft Balancer Replacement (Manual Transmission) .
  23. Remove the 4 lower timing belt cover bolts (2).
    Fig 5: Timing Belt Lower Front Cover
    GM2026840Courtesy of GENERAL MOTORS COMPANY
  24. Remove the lower timing belt cover (1).
  25. Lower the vehicle.
  26. Support the engine under the oil pan.
  27. Remove the engine mount nut (3).
    Fig 6: Engine Mount And Bolts
    GM2699323Courtesy of GENERAL MOTORS COMPANY
  28. Remove the 5 engine mount bolts (1, 2).
  29. Remove the engine mount (4).
  30. Remove the 3 engine mount bracket bolts (1).
    Fig 7: Engine Mount Bracket And Bolts
    GM2699324Courtesy of GENERAL MOTORS COMPANY
  31. Remove the engine mount bracket (2).
  32. Remove the center front timing belt cover from the rear timing belt cover at 2 locations.
    Fig 8: View Of Toothed Belt Cover
    GM1945761Courtesy of GENERAL MOTORS COMPANY
  33. Remove the center front timing belt cover (1).
  34. Install the EN-6340  locking tool into the camshaft adjusters.
    Fig 9: Spot Type Markings And Locking Tool
    GM2373398Courtesy of GENERAL MOTORS COMPANY
    • Install the EN-6340  locking tool - left (1) in the camshaft adjusters as shown.
      NOTE: The spot type marking (4) on the intake camshaft adjuster does not correspond to the groove of EN-6340  locking tool - left during this process but must be somewhat above as shown.
    • Install EN-6340  locking tool - right (2) in the camshaft adjusters as shown.
      NOTE: The spot type marking (3) on the exhaust camshaft adjuster must correspond to the groove on EN-6340  locking tool - right.
  35. Apply tension to the timing belt tensioner (2) in the direction of the arrow, using an allen key (1).
    Fig 10: Drive Belt Tensioner, Allen Key And Locking Pin
    GM1937014Courtesy of GENERAL MOTORS COMPANY
  36. Install the EN-6333  pin (3).
  37. Remove the timing belt (1).
    Fig 11: Timing Belt, Timing Belt Tensioner
    GM2026841Courtesy of GENERAL MOTORS COMPANY
    NOTE: Note the direction of the belt, if the timing belt will be reused.
  38. Remove and DISCARD the timing belt tensioner bolt (3).
  39. Remove the timing belt tensioner (2).
  40. Raise the vehicle.
  41. Remove the timing belt idler pulley bolt (1).
    Fig 12: Timing Belt Idler Pulley Bolt
    GM2026843Courtesy of GENERAL MOTORS COMPANY
  42. Remove the timing belt idler pulley (2).
  43. Remove the EN-6625  locking device.
  44. Set the crankshaft in direction of engine rotation to 60 degrees (a) before TDC. Use the EN-45059  meter and the crankshaft balancer bolt.
    Fig 13: Turning Crankshaft Against Direction Of Engine Rotation
    GM2027016Courtesy of GENERAL MOTORS COMPANY
  45. Remove the crankshaft sprocket (1).
    Fig 14: Crankshaft Sprocket
    GM2028278Courtesy of GENERAL MOTORS COMPANY
    NOTE: Some engine oil will run out of the camshaft and the camshaft position actuator adjuster. That is the reason for the removal of the whole timing assembly.
  46. Lower the vehicle.
  47. Remove the EN-6340  locking tool.
  48. Turn the camshaft by the camshaft position actuator adjuster until the groove on the end of the camshafts is horizontal.
    Fig 15: Aligning Camshafts Horizontally
    GM2026512Courtesy of GENERAL MOTORS COMPANY
    NOTE: Note the arrows.
  49. Install the EN-6628-A  locking tool (1).
    Fig 16: Locking Tool
    GM2026534Courtesy of GENERAL MOTORS COMPANY
  50. Place a collecting basin underneath the vehicle.
  51. Remove the camshaft position actuator adjuster closure bolt (1) of the intake camshaft position actuator adjuster and the exhaust camshaft position actuator adjuster (3).
    Fig 17: Camshaft Position Actuator Adjuster Closure Bolt
    GM2026844Courtesy of GENERAL MOTORS COMPANY
  52. Remove and DISCARD the intake camshaft position actuator adjuster bolt and/or the exhaust camshaft position actuator adjuster bolt (2).
    NOTE: A second technician is required.
    NOTE: Use an appropriate open-end wrench in order to counterhold the camshaft hexagon. A thin cross-section wrench is required for a better fit. The usage of EN-6628-A  locking tool is for the camshaft adjustment to prevent misalignment of the camshafts. The wrench is required to counterhold the camshafts during bolt torque procedure.
  53. Remove the intake camshaft position actuator adjuster and the exhaust camshaft position actuator adjuster (3).
  54. Remove the timing belt rear cover. Refer to Timing Belt Rear Cover Removal .
  55. Loosen the 10 cylinder head bolts in sequence as shown.
    Fig 18: Cylinder Head Bolts Tightening Sequence
    GM2027932Courtesy of GENERAL MOTORS COMPANY
    1. Loosen the 10 bolts 90 degrees.
    2. Loosen the 10 bolts 180 degrees.
  56. Remove and DISCARD the 10 cylinder head bolts (1).
    Fig 19: Cylinder Head And Bolts
    GM2652382Courtesy of GENERAL MOTORS COMPANY
  57. Remove the cylinder head (2).
  58. Remove and DISCARD the cylinder head gasket (3).
  59. In case of re-use, then clean and inspect the cylinder head. Refer to Cylinder Head Cleaning and Inspection .
  60. Remove the thermostat housing. Refer to Engine Coolant Thermostat Housing Removal .
  61. Remove the camshafts. Refer to Camshaft Removal .
  62. Remove the valve lifter. Refer to Valve Lifter Removal .
  63. Disassemble the cylinder head. Refer to Cylinder Head Disassemble .
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