Sebring 2006

Camshaft, Bearings & Lifters

Print

Bearing Replacement



Check each bearing for damage. If the bearing surface is excessively damaged, replace the cylinder head assembly or camshaft bearing cap, as necessary.

Inspection



  1. Inspect the camshaft bearing journals for damage. If journals are damaged, check the cylinder head for damage. Also check the cylinder head oil holes for clogging.
  2.  
  3. Check the cam lobe and bearing surfaces for abnormal wear and damage. Replace the camshaft if it is defective.
  4.  
  5. Measure the camshaft end play as follows:
    1. Using a suitable tool, move the camshaft as far rearward as it will go.
    2.  
    3. Zero out the dial indicator.
    4.  
    5. Move the camshaft as far forward as it will go.
    6.  
    7. Record the reading on the dial indicator.
    8.  
    9. If the end play is exceeds the specification, check cylinder head and camshaft for wear; replace as necessary.
    10.  

  6.  

Removal & Installation



2.4L Engine

This engine uses a Dual Overhead Camshaft (DOHC), 4-valves per cylinder, cross-flow aluminum cylinder head. The valves are actuated by roller cam followers which pivot on stationary hydraulic valve adjusters. Care must be taken to ensure all valve timing marks align after cylinder head and valve train service.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect the negative battery cable from the left shock tower.
    NOTE
    The ground cable is equipped with an insulator grommet which should be placed on the stud to prevent the negative battery cable from accidentally grounding.

  4.  
  5. Relieve the fuel system pressure using the recommended procedure.
  6.  
  7. Remove or disconnect the following:

    The spark plugs cables
     
    The ignition coil pack with the spark plug cables
     
    The cylinder head cover and discard the gasket
     
    The ground strap
     
    The timing belt covers and timing belt
     
    The camshaft sprockets by holding them with Tool 6847, while removing the bolt

    Click image to see an enlarged view

    Fig. Use special tool 6847 to hold the camshaft sprocket while removing or installing the center bolt-2.4L engine

     

  8.  
  9. Take note that the camshaft bearing caps are numbered for the correct location during installation.
    NOTE
    Remove the outer bearing caps first.



    Click image to see an enlarged view

    Fig. Camshaft bearing cap identification-2.4L engine



    Click image to see an enlarged view

    Fig. Camshaft bearing cap bolt removal sequence-2.4L engine

  10.  
  11. Loosen, but do not remove, the camshaft bearing cap retaining fasteners in the correct sequence, inside working outward. Perform this step on one camshaft at a time.
  12.  
  13. Identify the camshafts, if they are to be reused for later installation. The camshafts are not interchangeable.
  14.  
  15. Remove or disconnect the following:
    NOTE
    Any components that are to be reused must be installed in their original locations. Use care to identify and mark the positions of any removed valve train components so they may be reinstalled correctly.



    The camshaft bearing caps
     
    The camshafts
     
    The camshaft followers
     

  16.  
  17. Inspect the camshaft bearing oil feed holes in the cylinder head for clogging. Inspect the camshaft bearing journals for wear or scoring. Check the cam surface for abnormal wear and damage. A visible worn groove in the roller path or on the cam lobes is cause for replacement.
  18.  

To install:

  1. Thoroughly clean all camshaft and related parts.
  2.  
  3. Inspect the camshaft end-play using the following procedure:
    1. Lubricate the camshaft journals and install the camshaft WITHOUT the cam follower assemblies. Install the rear cam caps and tighten to 21 ft. lbs. (28 Nm).
    2.  
    3. Push the camshaft rearward as far as it will go.
    4.  
    5. Adjust a dial indicator to rest against the front of the camshaft (the sprocket end). Zero the indicator.
    6.  
    7. Move the camshaft forward as far as it will go. Read the dial indicator. End-play specification is 0.002-0.010 inch (0.05-0.15mm).
    8.  
    9. If excessive end-play is present, inspect the cylinder head and camshaft for wear; replace if necessary.
    10.  

  4.  
  5. If the fit and condition of the camshafts are acceptable, remove the camshafts for installation of the cam followers.
  6.  
  7. The hydraulic valve lash adjusters are inside the roller cam followers. Be sure they are clean, well lubricated with engine oil and properly positioned. Install the cam followers in their original positions on the hydraulic adjuster and valve stem.
    WARNING
    Be sure NONE of the pistons are at Top Dead Center (TDC) when installing the camshafts.

  8.  
  9. Lubricate the camshaft bearing journals and cam followers with clean engine oil.
  10.  
  11. Install the camshafts.
  12.  
  13. Install the right/left-side camshaft bearing caps Nos. 2 through 5 and right-side No. 6. Torque the M6 fasteners to 105 inch lbs. (12 Nm) in the correct sequence.

    Click image to see an enlarged view

    Fig. Camshaft bearing cap tightening sequence-2.4L engine



    Click image to see an enlarged view

    Fig. Apply sealer as shown to prevent oil leakage from the camshaft bearing end caps-2.4L engine

  14.  
  15. Apply MOPAR® Gasket Maker sealer, or equivalent, to the No. 1 and left-side No. 6 bearing caps.
  16.  
  17. Install or connect the following:
    WARNING
    If the timing belt or sprockets are incorrectly installed, engine damage will occur. Take time to be sure all timing marks are correctly aligned.



    The bearing caps and torque the M8 fasteners to 21 ft. lbs. (28 Nm)
     
    The camshaft end seals
     
    The camshaft sprockets, if removed, and torque the bolts to 75 ft. lbs. (101 Nm)
     
    The timing belt, making sure all timing marks are aligned
     
    The timing belt covers
     

  18.  
  19. Clean all sealing surfaces. Make certain the rails are flat.
  20.  
  21. Install the new cylinder head cover gaskets. Apply MOPAR® Silicone Rubber Adhesive Sealant, or equivalent, at the camshaft cap corners and at the top edge of the 1 / 2 round seal.
    NOTE
    Inspect the spark plug well seals for cracking and/or swelling and replace if necessary.

  22.  
  23. Install the cylinder head cover and torque the fasteners, in sequence, using the following:
    1. Step 1: 40 inch lbs. (5 Nm).
    2.  
    3. Step 2: 80 inch lbs. (9 Nm).
    4.  
    5. Step 3: 105 inch lbs. (12 Nm).
    6.  

  24.  
  25. Install or connect the following:
    NOTE
    An oil and filter change is recommended.



    The ignition coil pack and torque the fasteners to 105 inch lbs. (12 Nm)
     
    The spark plug cables
     
    The ground strap
     
    All vacuum lines and wiring
     
    The negative battery cable
     

  26.  
  27. Test run the vehicle. Check for leaks and for proper operation.
  28.  

2.7L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove or disconnect the following:

    The negative battery
     
    The timing chain and secondary chain tensioner bolts
     
    The camshaft bearing caps
     
    The camshafts, secondary chain, and tensioner as an assembly
     
    The tensioner and chain from the camshafts
     

  4.  

To install:

Click image to see an enlarged view

Fig. Tighten the camshaft bearing caps in the proper sequence-2.7L engine

  1. Install the camshaft chain on the cams and make certain that the plated links are facing forward.
  2.  
  3. Compress the chain tensioner as follows:
    1. Place the tensioner in a soft jaw vise.
    2.  
    3. Slowly compress the tensioner until the fabricated lock pin can be installed in the locking holes.
    4.  

  4.  
  5. Install or connect the following:

    The tensioner between the camshafts and chain. Rotate the cams until the plated links and dots are in the 12 o-clock position
     
    The cams to the cylinder head
     
    The camshaft bearing caps. Slowly, and in sequence, torque the bolts to 105 inch lbs. (12 Nm)
     
    The secondary chain tensioner bolts and torque them to 105 inch lbs. (12 Nm). Remove the locking pin from the tensioner
     
    The primary timing chain
     
    The negative battery cable
     

  6.  

 
label.common.footer.alt.autozoneLogo