Left Cylinder Head

LEFT

Special Tools:











CAUTION: The magnetic timing wheels (1) must not come in contact with magnets (pickup tools, trays, etc.) or any other strong magnetic field. This will destroy the timing wheels ability to correctly relay camshaft position to the camshaft position sensor.






1. Perform the fuel pressure release procedure Service and Repair.
2. Disconnect and isolate the negative battery cable.
3. Remove the engine cover (1).





4. Remove the air inlet hose (3) and the air cleaner body Air Cleaner Body - Removal.





5. Remove the electric vacuum pump (4) and mounting bracket (1) Removal.






NOTE: Power steering pump not shown.

6. Raise and support the vehicle Maintenance.
7. If equipped, remove the front skid plate and front suspension skid plate.
8. Drain the cooling system Service and Repair.
9. Drain the engine oil Service and Repair.
10. Remove the nut (1) and bolt (4) from the support brackets of the heater core return tube (3).
11. Remove the A/C compressor mounting stud (2).





12. Lower the vehicle.
13. Remove the nut (2) from the support bracket of the heater core return tube (3) and reposition the tube.





14. Remove the vapor purge tube (1) from the fuel purge solenoid (2) Service and Repair





15. Remove the upper and lower intake manifolds (2) and insulator Intake Manifold - Removal





16. Disengage the clips (1), remove the make-up air tube (3) from the left cylinder head cover and reposition the transmission breather hose (2).






NOTE: Right catalytic converter shown, left catalytic converter similar.

17. Disconnect the left upstream oxygen sensor connector (4) from the main wire harness.
18. Loosen the lower catalytic converter flange bolts (3).
19. Remove the upper catalytic converter flange bolts (1) and reposition the catalytic converter (2).





20. Remove the accessory drive belt (4) Serpentine Accessory Drive Belt - Removal





21. Disconnect the A/C compressor electrical connector (1) and disengage the wire harness retainer (2) from the A/C compressor discharge line.





22. Remove the remaining three bolts (1) and reposition the A/C compressor (2).





23. Disconnect the Engine Coolant Temperature (ECT) sensor electrical connector (3).





24. Disconnect the ignition coil capacitor electrical connector.
25. Disengage the injection/ignition harness connector (1) and the engine oil pressure/temperature harness connector (3) from the retainer bracket (2) on the rear of the left cylinder head.





26. Disengage two starter wire harness retainers (1) from the upper intake manifold support brackets.
27. Disengage one main wire harness retainer (3) from the left cylinder head cover and two retainers (2) from the upper intake manifold support brackets.





28. Remove the bolts (2) and remove the LH upper intake manifold support brackets (1).





29. Remove the spark plugs Spark Plug - Removal.
30. Remove the cylinder head covers, lower and upper oil pans, crankshaft vibration damper and engine timing cover Engine Timing Cover(s) - Removal

NOTE: Take this opportunity to measure timing chain wear Measuring Timing Chain Wear.

31. Lower the vehicle.






CAUTION: When aligning timing marks, always rotate engine by turning the crankshaft. Failure to do so will result in valve and/or piston damage.

32. Rotate the crankshaft CW to place the number one piston at TDC on the exhaust stroke by aligning the dimple (4) on the crankshaft with the block/bearing cap junction (5). The left side cam phaser arrows (2) should point toward each other and be parallel to the valve cover sealing surface (3). The right side cam phaser arrows (7) should point away from each other and the scribe lines (9) should be parallel to the valve cover sealing surface (8).

CAUTION: Always reinstall timing chains so that they maintain the same direction of rotation. Inverting a previously run chain on a previously run sprocket will result in excessive wear to both the chain and sprocket.

33. Mark the direction of rotation on the timing chain using a paint pen or equivalent to aid in reassembly.






CAUTION: When the timing chains are removed and the cylinder heads are still installed, DO NOT rotate the camshafts or crankshaft without first locating the proper crankshaft position. Failure to do so will result in valve and/or piston damage.

34. Reset the LH cam chain tensioner by lifting the pawl (1), pushing back the piston (2) and installing Tensioner Pin (3) Service and Repair.






NOTE: Minor rotation of a camshaft (a few degrees) may be required to install the camshaft phaser lock.

35. Install the LH Camshaft Phaser Lock (4).
36. Loosen both the intake oil control valve (6) and exhaust oil control valve (2).
37. Remove the LH Camshaft Phaser Lock (4).
38. Remove the oil control valve (2) from the left side exhaust cam phaser and pull the phaser off of the camshaft.
39. Remove the oil control valve (6) from the left side intake cam phaser and pull the phaser off of the camshaft.





40. Remove the LH cam chain tensioner arm (1).
41. Remove two T30 bolts (6) and the LH cam chain tensioner (5).
42. Remove two T30 bolts (4) and the LH cam chain guide (2).





43. Remove the left camshafts Camshaft - Removal

NOTE: If the rocker arms are to be reused, identify their positions so that they can be reassembled into their original locations.

44. Remove the rocker arms Valve Rocker Arm - Removal

NOTE: If the hydraulic lifters are to be reused, identify their positions so that they can be reassembled into their original locations.

45. If required, remove the hydraulic lifters Hydraulic Lifter - Removal
46. Using the sequence shown, remove the cylinder head retaining bolts.






NOTE: Right head gasket shown, left head gasket similar.

WARNING: The multi-layered steel head gaskets have very sharp edges that could cause personal injury if not handled carefully.

NOTE: The head gasket (1) crimps the locating dowels (2) and the dowels may pull out of the engine block when the head gasket is removed.

47. Remove the cylinder head and gasket (1). Discard the gasket.

CAUTION: Do not lay the cylinder head on its gasket sealing surface, due to the design of the cylinder head gasket, any distortion to the cylinder head sealing surface may prevent the gasket from properly sealing resulting in leaks.





48. If required, remove the Engine Coolant Temperature (ECT) sensor (4).
49. If required, remove the bolt (2) and the ignition coil capacitor (1).
50. If required, remove the bolt (3) and the engine wire harness retainer bracket (5).