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. If removed, install the Engine Coolant Temperature (ECT) sensor (4) and tighten to 11 Nm (97 in. lbs.).
2. If removed, install the ignition coil capacitor (1) with a M6 bolt (2) tightened to 10 Nm (89 in. lbs.).
3. If removed, install the engine wire harness retainer bracket (5) with a T30 bolt (3) tightened to 12 Nm (106 in. lbs.).






CAUTION: The cylinder head bolts are tightened using a torque plus angle procedure. The bolts must be examined BEFORE reuse. If the threads are necked down the bolts must be replaced.

NOTE: Typical cylinder head bolt shown.

4. Check cylinder head bolts for necking by holding a scale or straight edge against the threads. If all the threads do not contact the scale (2) the bolt must be replaced.






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

CAUTION: When cleaning cylinder head and cylinder block surfaces, DO NOT use a metal scraper because the surfaces could be cut or ground. Use ONLY a wooden or plastic scraper.

5. Clean and prepare the gasket sealing surfaces of the cylinder head and block Engine Gasket Surface Preparation.

CAUTION: Non-compressible debris such as oil, coolant or RTV sealants that are not removed from bolt holes can cause the aluminum casting to crack when tightening the bolts.

6. Clean out the cylinder head bolt holes in the engine block.

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

CAUTION: The cylinder head gaskets are not interchangeable between the left and right cylinder heads and are clearly marked (3) with "R" for right and "L" for left.

7. Position the new cylinder head gasket (1) on the locating dowels (2).





8. Position the cylinder head onto the cylinder block. Make sure the cylinder head seats fully over the locating dowels.

NOTE: Do not apply any additional oil to the bolt threads.

9. Install the eight head bolts finger tight.
10. Tighten the cylinder head bolts in the sequence shown, following this 9 step torque plus angle method. Tighten according to the following torque values:
- Step 1: All to 30 Nm (22 ft. lbs.)
- Step 2: All to 45 Nm (33 ft. lbs.)
- Step 3: All + 75° Turn Do not use a torque wrench for this step.
- Step 4: All + 50° Turn Do not use a torque wrench for this step.
- Step 5: Loosen all fasteners in reverse of sequence shown
- Step 6: All to 30 Nm (22 ft. lbs.)
- Step 7: All to 45 Nm (33 ft. lbs.)
- Step 8: All + 70° Turn Do not use a torque wrench for this step.
- Step 9: All + 70° Turn Do not use a torque wrench for this step.





NOTE: If the hydraulic lifters are being reused, reassemble them into their original locations.

11. If removed, install the hydraulic lifters Hydraulic Lifter - Installation

NOTE: If the rocker arms are being reused, reassemble them into their original locations.

12. Install the rocker arms and camshafts Camshaft - Installation
13. Rotate the camshafts CW to TDC by positioning the alignment holes (1) vertically.





14. Install the LH cam chain guide (2) with two bolts (4). Tighten the T30 bolts (4) to 12 Nm (106 in. lbs.).
15. Install the LH cam chain tensioner (5) to the cylinder head with two bolts (6). Tighten the T30 bolts (6) to 12 Nm (106 in. lbs.).
16. Reset the LH cam chain tensioner (5) by lifting the pawl (3), pushing back the piston and installing Tensioner Pin (7) Service and Repair.
17. Install the LH tensioner arm (1).





18. Press the LH intake cam phaser onto the intake camshaft. Install and hand tighten the oil control valve.

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.

19. Drape the left side cam chain over the LH intake cam phaser and onto the idler sprocket (1) so that the arrow (3) is aligned with the plated link (2) on the cam chain.





20. While maintaining this alignment, route the cam chain around the exhaust and intake cam phasers so that the plated links are aligned with the phaser timing marks (1). Position the left side cam phasers so that the arrows (3) point toward each other and are parallel to the valve cover sealing surface (5). Press the exhaust cam phaser onto the exhaust cam, install and hand tighten the oil control valve (2).

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

21. Install the LH Camshaft Phaser Lock (4) and tighten the oil control valves (2) and (6) to 150 Nm (110 ft. lbs.).





22. Remove the LH Camshaft Phaser Lock.
23. Remove the Tensioner Pin (1) from the LH cam chain tensioner.
24. Rotate the crankshaft CW two complete revolutions stopping when the dimple (4) on the crankshaft is aligned the with the block/bearing cap junction (5).
25. While maintaining this alignment, verify that the arrows on the left side cam phasers (2) point toward each other and are parallel to the valve cover sealing surface (3) and that the right side cam phaser arrows (7) point away from each other and the scribe lines (9) are parallel to the valve cover sealing surface (8).





26. There should be 12 chain pins (2) between the exhaust cam phaser triangle marking (1) and the intake cam phaser circle marking (3).
27. If the engine timing is not correct, repeat this procedure.
28. Install the engine timing cover, crankshaft vibration damper, upper and lower oil pans and cylinder head covers Engine Timing Cover(s) - Installation





29. Install the LH upper intake manifold support brackets (1). Loosely install the studbolts (2).





30. Engage two starter wire harness retainers (1) to the upper intake manifold support brackets.
31. Engage one main wire harness retainer (3) to the left cylinder head cover and two retainers (2) to the upper intake manifold support brackets.





32. Install the spark plugs. Tighten to 17.5 Nm (13 ft. lbs.) Spark Plug - Installation.
33. Connect the ignition coil capacitor electrical connector.
34. Engage the injection/ignition harness connector (1) and the engine oil pressure/temperature harness connector (3) to the retainer bracket (2) on the rear of the left cylinder head.





35. Connect the Engine Coolant Temperature (ECT) sensor electrical connector (3).





36. Install the A/C compressor (2) with three bolts (1) tightened to 25 Nm (18 ft. lbs.).





37. Connect the A/C compressor electrical connector (1) and Engage the wire harness retainer (2) to the A/C compressor discharge line.





38. Install the accessory drive belt (4) Serpentine Accessory Drive Belt - Installation.






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

39. Install the left catalytic converter (2) onto the partially installed lower catalytic converter flange bolts (3).
40. Install the upper catalytic converter flange bolts (1) and tighten all M8 bolts to 23 Nm (17 ft. lbs.).
41. Connect the left upstream oxygen sensor connector (4) to the main wire harness.





42. Install the make-up air tube (3) to the left cylinder head cover and engage the clips (1) to the transmission breather hose (2).





43. Install the upper and lower intake manifolds Intake Manifold - Installation





44. Install the vapor purge tube (1) to the fuel purge solenoid (2) Service and Repair





45. Install the nut (2) to the support bracket of the heater core return tube (3) and tighten to 12 Nm (106 in. lbs.).






NOTE: Power steering pump not shown.

46. Raise and support the vehicle Maintenance.
47. Install the A/C compressor mounting stud (2) and tighten to 25 Nm (18 ft. lbs.).
48. Install the nut (1) and bolt (4) to the support brackets of the heater core return tube (3). Tighten to 12 Nm (106 in. lbs.).
49. If equipped, install the front skid plate and front suspension skid plate.





50. Lower the vehicle.
51. Install the electric vacuum pump (4) and mounting bracket (1) Installation.





52. Install the air inlet hose (3) and the air cleaner body Air Cleaner Body - Installation





53. If removed, install the oil filter and fill the engine crankcase with the proper oil to the correct level Service and Repair
54. Fill the cooling system Service and Repair.
55. Install the engine cover (1).
56. Connect the negative battery cable and tighten nut to 5 Nm (45 in. lbs.).
57. Run the engine until it reaches normal operating temperature. Check cooling system for correct fluid level Service and Repair

NOTE: The Cam/Crank Variation Relearn procedure must be performed using the scan tool anytime there has been a repair/replacement made to a powertrain system, for example: flywheel, valvetrain, camshaft and/or crankshaft sensors or components.