LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2007 >> Commander Limited, 5.7 2, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (3.7L Engine (Service Information)) >> Cylinder Head >> Installation >> Cylinder Head - Left

Cylinder Head - Left

WARNING: This page is about a different variant/trim than selected.
Fig 1: Checking Cylinder Head Bolts for Stretching (Necking)
GC0011748Courtesy of CHRYSLER LLC
NOTE: 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 should be replaced.

Necking can be checked by holding a straight edge against the threads (2). If all the threads do not contact the scale, the bolt should be replaced.

Fig 2: Proper Tool Usage For Surface Preparation
GC0011749Courtesy of CHRYSLER LLC
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 (1).
  1. Clean the cylinder head and cylinder block mating surfaces.
    Fig 3: Cylinder Head Tightening Sequence
    GC0011750Courtesy of CHRYSLER LLC
    * - INDICATES SEALANT ON THREADS
  2. Position the new cylinder head gasket on the locating dowels.
    CAUTION: When installing cylinder head, use care not damage the tensioner arm or the guide arm.
  3. Position the cylinder head onto the cylinder block. Make sure the cylinder head seats fully over the locating dowels.
    NOTE: The four smaller cylinder head mounting bolts require sealant to be added to them before installing. Failure to do so may cause leaks. The locations are identified with an *.
  4. Lubricate the cylinder head bolt threads with clean engine oil and install the eight M11 bolts.
  5. Coat the four M8 cylinder head bolts with Mopar® Lock and Seal Adhesive  then install the bolts.
    NOTE: The cylinder head bolts are tightened using an angle torque procedure, however, the bolts are not a torque-to-yield design.
  6. Tighten the bolts in sequence using the following steps and torque values:
    1. Step 1: Tighten bolts 1-8, 27 N.m (20 ft. lbs.).
    2. Step 2: Verify that bolts 1-8, all reached 27 N.m (20 ft. lbs.), by repeating step 1 without loosening the bolts. Tighten bolts 9 thru 12 to 14 N.m (10 ft. lbs.).
    3. Step 3: Tighten bolts 1-8, 90 degrees.
    4. Step 4: Tighten bolts 1-8, 90 degrees, again. Tighten bolts 9-12, 26 N.m (19 ft. lbs.)
  7. Position the secondary chain onto the camshaft drive gear, making sure one marked chain link is on either side of the V6 mark on the gear then using Camshaft Holder 8428 position the gear onto the camshaft.
    CAUTION: Remove excess oil from camshaft sprocket retaining bolt before reinstalling bolt. Failure to do so may cause over-torqueing of bolt resulting in bolt failure.
  8. Install the camshaft drive gear retaining bolt.
  9. Install the left side secondary chain guide. See INSTALLATION .
  10. Install the cylinder head access plug.
  11. Reset and install the left side secondary chain tensioner. See INSTALLATION .
  12. Remove Secondary Camshaft Chain Holder 8429.
  13. Install the timing chain cover. See INSTALLATION .
  14. Install the crankshaft damper. See INSTALLATION . Tighten damper bolt 175 N.m (130 ft. lbs.).
  15. Install the power steering pump.
  16. Install the fan blade assembly and fan shroud. Refer to INSTALLATION .
  17. Install the cylinder head cover. See INSTALLATION .
  18. Install the master cylinder and booster assembly. Refer to INSTALLATION .
  19. Install the intake manifold. See INSTALLATION .
  20. Refill the cooling system. Refer to STANDARD PROCEDURE .
  21. Raise the vehicle.
  22. Install the exhaust pipe onto the left exhaust manifold.
  23. Lower the vehicle.
  24. Connect the negative cable to the battery.
  25. Start the engine and check for leaks.
scientia non olet · About LEMON Manuals