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Home >> Jeep >> 2017 >> Wrangler Sahara, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (3.2L Engine (Service Information)) >> Cylinder Head >> Installation >> Left Cylinder Head

Left Cylinder Head

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
GC0144190Courtesy of CHRYSLER GROUP, LLC
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.

GC0169778Courtesy of CHRYSLER GROUP, LLC
  1. If removed, install the Engine Coolant Temperature (ECT) sensor (2) and tighten to the proper specifications. Refer to TORQUE SPECIFICATIONS  .
  2. If removed, install the ignition coil capacitor and the engine wire harness retainer bracket and tighten to the proper specifications. Refer to TORQUE SPECIFICATIONS  .
    GC0104468Courtesy of CHRYSLER GROUP, LLC
    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 in illustration.

  3. Check cylinder head bolts for necking by holding a scale or straight edge against the threads. If all of the threads do not contact the scale (2) the bolt must be replaced.
    GC0144308Courtesy of CHRYSLER GROUP, LLC
    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.

  4. Clean and prepare the gasket sealing surfaces of the cylinder head and block. Refer to 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.

  5. 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 installation of the cylinder head gaskets are not interchangeable between the left and right cylinder heads. They are clearly marked (3) with "R" for right and "L" for left. They must be applied on a dry surface, without the use of any adhesives.

  6. Position the new cylinder head gasket (1) on the locating dowels (2).
    Fig 1: Cylinder Head Retaining Bolt Tightening Sequence - Left
    GC0144166Courtesy of CHRYSLER GROUP, LLC
  7. Using care, position the cylinder head onto the engine block.
    NOTE:

    Do not apply any oil to the bolt threads.

  8. Install the eight head bolts finger tight.
  9. Tighten the cylinder head bolts in the sequence shown in illustration, following this 9 step torque plus angle method. The torque sequence must be used for each step. Tighten according to the following torque values:
    • Step 1: All to 30 N.m (22 ft. lbs.)
    • Step 2: All to 45 N.m (33 ft. lbs.)
    • Step 3: Re-tighten all to 45 N.m (33 ft. lbs.)
    • Step 4: All + 125° Turn (optional angle if 125° rotation cannot be accomplished in one motion; tighten all by turning 35° followed by tightening all by turning 90°) Do not use a torque wrench for this step. 
    • Step 5: Loosen all fasteners in reverse of sequence shown in illustration
    • Step 6: All to 30 N.m (22 ft. lbs.)
    • Step 7: All to 45 N.m (33 ft. lbs.)
    • Step 8: Re-tighten all to 45 N.m (33 ft. lbs.)
    • Step 9: All + 130° Turn (optional angle if 130° rotation cannot be accomplished in one motion; tighten all by turning 40° followed by tightening all by turning 90°) Do not use a torque wrench for this step. 
    NOTE:

    For engine builds using a new block follow steps 1-9. For engine re-builds (reuse block) follow step 6-9.

    GC0144138Courtesy of CHRYSLER GROUP, LLC
    NOTE:

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

  10. If removed, install the hydraulic lifters. Refer to LIFTER(S), HYDRAULIC, INSTALLATION .
    NOTE:

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

    CAUTION:

    Do not rotate the camshafts more than a few degrees independently of the crankshaft. Valve to piston contact could occur resulting in possible valve damage. If the camshafts need to be rotated more than a few degrees, first move the pistons away from the cylinder heads by rotating the crankshaft counterclockwise to a position 30° before-top-dead-center. Once the camshafts are returned to their top-dead-center position, rotate the crankshaft clockwise to return the crankshaft to top-dead-center.

  11. Install the rocker arms and camshafts. Refer to CAMSHAFT, ENGINE, INSTALLATION .
    GC0144140Courtesy of CHRYSLER GROUP, LLC
  12. Install the LH cam chain guide (2) with two bolts (4). Tighten the bolts to the proper specifications. Refer to TORQUE SPECIFICATIONS  .
  13. Install the LH cam chain tensioner (5) to the cylinder head with two bolts (6). Tighten the bolts to the proper specifications. Refer to TORQUE SPECIFICATIONS  .
  14. Reset the LH cam chain tensioner (5) by lifting the pawl (3), pushing back the piston and installing Tensioner Pin (special tool #8514, Pins, Tensioner) (7). Refer to STANDARD PROCEDURE  .
  15. Install the LH tensioner arm (1).
    GC0144165Courtesy of CHRYSLER GROUP, LLC
  16. 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.

  17. 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.
    GC0159936Courtesy of CHRYSLER GROUP, LLC
  18. While maintaining this alignment, route the cam chain around the exhaust and intake cam phasers so that the plated links (2) are aligned with the phaser timing marks (1, 3). Position the cam phasers so that the arrows (4) point toward each other and are parallel to the valve cover sealing surface. Press the exhaust cam phaser onto the exhaust cam, install and hand tighten the oil control valve.
    GC0144993Courtesy of CHRYSLER GROUP, LLC
    NOTE:

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

  19. Install the LH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser) (1) and tighten the oil control valves (2, 3) to the proper specifications. Refer to TORQUE SPECIFICATIONS  .
    GC0144142Courtesy of CHRYSLER GROUP, LLC
  20. Remove the LH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser).
  21. Remove the Tensioner Pin (special tool #8514, Pins, Tensioner) (1) from the LH cam chain tensioner.
  22. Rotate the crankshaft clockwise two complete revolutions stopping when the dimple (4) on the crankshaft is aligned the with the block/bearing cap junction (5).
  23. 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).
    GC0207766Courtesy of CHRYSLER GROUP, LLC
  24. There should be 12 chain pins (2) between the exhaust cam phaser triangle marking (1) and the intake cam phaser circle marking (3).
  25. If the engine timing is not correct, loosen the timing chain by resetting the cam chain tensioner and repeat the camshaft alignment procedure. Refer to STANDARD PROCEDURE  .
  26. Install the generator. Refer to GENERATOR, INSTALLATION .
  27. Install the engine timing cover. Refer to INSTALLATION, TIMING COVER .
  28. Install the spark plugs. Refer to SPARK PLUG, INSTALLATION .
    GC0144404Courtesy of CHRYSLER GROUP, LLC
  29. Connect the main harness to the engine oil pressure/temperature harness (2) at the rear of the left cylinder head.
  30. Connect the main harness to the engine injection/ignition harness (1) at the rear of the left cylinder head.
    GC0154074Courtesy of CHRYSLER GROUP, LLC
  31. Connect the ignition coil capacitor harness connector (1).
    GC0169778Courtesy of CHRYSLER GROUP, LLC
  32. Connect the Engine Coolant Temperature (ECT) sensor harness connector (1).
  33. Install the lower and upper intake manifolds and insulator. Refer to MANIFOLD, INTAKE, INSTALLATION .
  34. Install the Powertrain Control Module (PCM). Refer to MODULE, POWERTRAIN CONTROL (PCM), INSTALLATION .
  35. Install the air resonator. Refer to RESONATOR, AIR CLEANER, INSTALLATION .
  36. Install the air cleaner body. Refer to BODY, AIR CLEANER, INSTALLATION .
  37. Evacuate and charge the A/C system. Refer to PLUMBING, STANDARD PROCEDURE .
    GC0159742Courtesy of CHRYSLER GROUP, LLC
  38. Install the engine cover (1).
  39. If removed, install the oil filter and fill the engine crankcase with the proper oil to the correct level. Refer to STANDARD PROCEDURE  .
  40. Fill the cooling system. Refer to STANDARD PROCEDURE .
  41. Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
  42. Install the belly pan. Refer to BELLY PAN, INSTALLATION .
  43. Lower the vehicle.
  44. Connect the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), connect the IBS connector.
  45. Run the engine until it reaches normal operating temperature. Check cooling system for correct fluid level. Refer to STANDARD PROCEDURE .
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.

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