Breeze, Cirrus, Sebring Convertible and Sedan, Stratus Sedan, 1999-2005

Camshaft, Bearings & Lifters

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Inspection



2.0L Engine
Camshaft

Inspect camshaft bearing journals for damage and binding. If journals are binding, also check the cylinder head bearing surface for damage, and check the camshaft bearing oil feed holes in the cylinder head for clogging. To measure cam lobe wear, measure lobe diameter in two places at the largest diameter (over the nose). Take first reading with micrometer in unworn area at the edge of the lobe. Take second reading in the worn area where cam follower contacts the lobe. Subtract second reading from the first. The difference is the cam lobe wear. If wear is 0.010-inch (0.254mm) or greater, replace the camshaft.

Camshaft Follower

Inspect the cam follower assembly for wear or damage and replace if necessary.

2.4L Engine
Camshaft-A/T

Measure the camshaft lobe overall height with a micrometer. Intake lobes should be no smaller than 1.452-inch (36.89mm). Exhaust lobes should be no smaller than 1.430-inch (36.33mm). If the lobes are smaller than spec, replace the camshaft.

Camshaft-M/T

Measure the camshaft lobe overall height with a micrometer. Intake lobes should be no smaller than 1.452-inch (36.89mm). Exhaust lobes should be no smaller than 1.443-inch (36.64mm). If the lobes are smaller than spec, replace the camshaft.

2.5L Engine

Measure the camshaft lobe overall height with a micrometer. Intake lobes should be no smaller than 1.4598-inch (37.08mm). Exhaust lobes should be no smaller than 1.4350-inch (36.45mm). If the lobes are smaller than spec, replace the camshaft.

3.0L Engine

Measure the camshaft lobe overall height with a micrometer. Intake lobes should be no smaller than 1.465-inch (37.21mm). Exhaust lobes should be no smaller than 1.443-inch (36.64mm). If the lobes are smaller than spec, replace the camshaft.

Removal & Installation



2.0L SOHC Engines

To remove the camshaft, the cylinder head must be removed.

  1. Perform fuel system pressure release procedure before attempting any repairs.
  2.  
  3. Remove or disconnect the following:
    NOTE
    Mark rocker arm shaft assemblies so that they are installed in their original positions.



    Cylinder head cover.
     



    Rocker arm shaft bolts loosening 1 / 4 turn at a time in a crisscross pattern.
     
    Timing belt, timing belt tensioner, and camshaft sprocket.
     
    Rear timing belt cover.
     
    Cylinder head by loosening the bolts 1 / 4 turn at a time in a crisscross pattern.
     
    Camshaft sensor and camshaft target magnet.
     
    Camshaft from the rear of cylinder head.

    Click image to see an enlarged view

    Fig. Camshaft removal overview-2.0L engine



    Click image to see an enlarged view

    Fig. Bearing caps are identified for location. Remove the outside bearing caps first (2.0L engine).



    Click image to see an enlarged view

    Fig. Loosen bearing cap bolts in this sequence-2.0L engine.



    Click image to see an enlarged view

    Fig. Inspecting camshafts for wear-2.0L engine



    Click image to see an enlarged view

    Fig. Inspecting camshaft follower-2.0L engine

     

  4.  

To install:

  1. Lubricate the camshaft journals with oil and install camshaft without rocker arm assemblies installed.
  2.  
  3. Install or connect the following:
    NOTE
    Camshaft must be installed before the camshaft seal is installed.



    Camshaft target magnet into the end of the camshaft. Tighten mounting screw to 30 inch lbs. (3.4 Nm)
     
    Camshaft position sensor and tighten mounting screws to 80 inch lbs. (9 Nm)
     
    Front camshaft seal.
     



    Cylinder head.
     
    Camshaft sprocket and tighten to 85 ft. lbs. (115 Nm)
     
    Rear timing belt cover.
     
    Timing belt tensioner and timing belt.
     
    Rocker arm assemblies in correct order as removed.
     
    Rocker arm assemblies in sequence 250 inch lbs. (28 Nm)
     
    Cylinder head cover and tighten fasteners to 105 inch lbs. (12 Nm)
     
    Ignition coil pack and ignition cables.
     

  4.  

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Rocker arm assemblies
     
    Timing belt and camshaft sprocket
     
    Cylinder head
     
    Camshaft Position (CMP) sensor
     
    Camshaft from the rear of the cylinder head
     

  4.  

To install:


NOTE
The cylinder head bolts should be checked for stretching before reuse. If the threaded area of the bolt is necked-down the bolts must be replaced with new ones. New head bolts are recommended.

  1. Thoroughly clean all parts. Inspect the camshaft journals for scoring. Check the oil feed holes in the head for blockage. Check the camshaft bearing journals for scoring. If light scratches are present, they may be removed with 400 grit abrasive paper. If deep scratches are present, replace the camshaft and check the cylinder head for damage. Replace the cylinder head if worn or damaged.
  2.  
  3. If the camshaft lobes show signs of wear, check the corresponding rocker arm roller for wear or damage. Replace rocker arms/Hydraulic Lash Adjuster (HLAs) if worn or damaged. If the camshaft lobes show signs of pitting on the nose, flank or base circle, replace the camshaft.
  4.  
  5. If the rocker arms and shaft are to be serviced, mark the rocker arms so any that are to be returned to service will be installed in their original locations.
  6.  
  7. Install or connect the following:

    Rocker arm on the rocker arm shaft
     
    Camshaft, be sure it turns freely
     
    Cam sensor and torque the screws to 85 inch lbs. (10 Nm)
     

  8.  
  9. Camshaft end-play can be checked by using the following procedure:
    1. Lubricate the camshaft journals and install the camshaft without the rocker arm assemblies.
    2.  
    3. Install the cam sensor and torque the screws to 85 inch lbs. (10 Nm).
    4.  
    5. Adjust a dial indicator to touch the camshaft nose.
    6.  
    7. Pry the camshaft rearward as far as it will go. Be sure the dial indicator probe is in contact with the camshaft.
    8.  
    9. Zero the dial indicator.
    10.  
    11. Move the camshaft forward as far as it will go.
    12.  
    13. Read the end-play on the dial indicator. Specification is 0.005-0.013 inch (0.13-0.33mm).
    14.  

  10.  
  11. Install or connect the following:

    Camshaft seal until it is flush with the cylinder head
     
    Camshaft sprocket and torque the bolt to 85 ft. lbs. (115 Nm)
     
    Cylinder head using new bolts
     

  12.  
  13. Before installing the rocker arm and shaft assemblies, position the crankshaft to 3 notches Before Top Dead Center (BTDC) on the crankshaft sprocket.
  14.  
  15. Install or connect the following:

    Rocker arm and shaft assemblies
     
    Camshaft sprocket
     
    Timing belt, by aligning all valve timing marks
     

  16.  

2.4L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect battery negative cable from remote negative terminal on shock tower and properly isolate to prevent accidental reconnection.
  4.  
  5. Remove or disconnect the following:
    NOTE
    Remove the camshaft bearing cap bolts in the order shown in the diagram.


    WARNING
    Camshafts are not interchangeable. The intake cam number 6 thrust bearing face spacing is wider.



    Cylinder head cover. Refer to Cylinder Head Cover.
     
    Timing belt, sprockets and cover. Refer to Timing Belt.
     
    Camshaft bearing caps
     

  6.  
  7. Identify the camshafts before removing from the head. The camshafts are not interchangeable

    Click image to see an enlarged view

    Fig. Roller rocker arm-2.4L, 2.5L and 3.0L engines

  8.  

To install:

  1. Remove camshaft retaining caps and lubricate bearing journals.
  2.  
  3. Install cam followers and camshafts with clean oil.
  4.  
  5. Install right and left camshaft bearing caps #2 thru #5 and right #6.
  6.  
  7. Torque M6 fasteners to 105 inch lbs. (12 Nm) in sequence shown.
  8.  
  9. Apply Mopar® Gasket Maker or suitable RTV to No. 1 and No. 6 bearing caps.
  10.  
  11. Install bearing caps and tighten M8 fasteners to 250 inch lbs. (28 Nm)
    NOTE
    Bearing end caps must be installed before seals can be installed.

  12.  
  13. Install timing belt, sprockets and covers. Refer to Timing Belt.
  14.  
  15. Install cylinder head cover. Refer to Cylinder Head Cover.
  16.  

This engine uses a 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:

    Spark plugs cables
     
    Ignition coil pack with the spark plug cables
     
    Cylinder head cover and discard the gasket
     
    Ground strap
     
    Timing belt covers and timing belt
     
    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 correct location during installation. 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:

    Camshaft bearing caps
     
    Camshafts
     
    Camshaft followers
     

  16.  
  17. 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.
  18.  
  19. 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.
  20.  

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 or connect the following:

    Camshafts
     
    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

     

  12.  
  13. Apply MOPAR® Gasket Maker sealer, or equivalent, to the No. 1 and left-side No. 6 bearing caps.
  14.  
  15. 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.



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

  16.  
  17. Clean all sealing surfaces. Make certain the rails are flat.
  18.  
  19. 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.

  20.  
  21. Install the cylinder head cover and torque the fasteners, in sequence, using the following:
    1. Step 1: 40 inch lbs. (4.5 Nm).
    2.  
    3. Step 2: 80 inch lbs. (9 Nm).
    4.  
    5. Step 3: 105 inch lbs. (12 Nm).
    6.  

  22.  
  23. Install or connect the following:
    NOTE
    An oil and filter change is recommended.



    Ignition coil pack and torque the fasteners to 105 inch lbs. (12 Nm)
     
    Spark plug cables
     
    Ground strap
     
    All vacuum lines and wiring
     
    Negative battery cable
     

  24.  
  25. Test run vehicle. Check for leaks and for proper operation.
  26.  

2.5L Engine

This engine uses aluminum alloy cylinder heads with 4-valves per cylinder and pressed-in cast iron valve guides. The cylinders are common to either cylinder bank. Two overhead camshafts are supported by 4 bearing journals which are part of the head with the distributor driven off the right (firewall side) cylinder head. Right and left camshaft drive sprockets are interchangeable. The sprockets and engine water pump are driven by the timing belt. Care must be taken to be sure all valve timing marks align after cylinder head and valve train service. Please note that for camshaft service, the cylinder head must be removed.

  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. Drain the cooling system.
  8.  
  9. Remove or disconnect the following:

    Timing belt covers and timing belt
     
    Camshaft sprockets by holding them with Tool 6847 while removing the bolt
     
    Upper intake plenum
     
    Manifold Absolute Pressure (MAP) and Intake Air Temperature (IAT) sensor wiring connectors
     
    Air cleaner cover, inlet hoses and air inlet resonator
     
    Throttle Position Sensor (TPS) and Idle Air Control (IAC) motor electrical connectors
     
    Throttle cable
     
    Speed control cable (if equipped)
     
    Exhaust Gas Recirculation (EGR) tube
     
    Lower intake manifold and discard the gasket
     
    Spark plug cables
     
    Cylinder head cover
     

  10.  
  11. Identify the rocker arm shaft assemblies.
  12.  
  13. Install the Auto Lash Adjuster Retainers MD 998443 to keep the auto lash adjusters from falling out of the rocker arms when the rocker arm assembly is removed.
  14.  
  15. Remove or disconnect the following:

    Rocker arm shaft assemblies from the cylinder head
     
    Distributor assembly
     
    Exhaust manifold and crossover pipe
     
    Cylinder head
     
    Thrust case from the left cylinder head
     
    Camshafts from the rear of the cylinder heads
     
    Camshaft oil seals and discard them
     

  16.  
  17. Inspect the camshafts for scratches or worn areas. For light scratches, remove them with 400 grit sand paper. For deep scratches, replace the camshaft and check the cylinder head for damage. Check the oil holes to be sure they are open and free of debris. If the camshaft lobes show signs of wear, check the corresponding rocker arm roller for wear or damage. Replace the rocker arm if worn or damaged. If the camshaft shows signs of wear on the lobes, replace it.
  18.  

To install:

  1. Check camshaft end-play, as follows:
    1. Lubricate the camshaft journals with engine oil and install the camshaft WITHOUT the rocker arm assemblies.
    2.  
    3. Move the camshaft rearward as far as it will go.
    4.  
    5. Mount a dial indicator to rest on the front of the camshaft.
    6.  
    7. Zero the indicator.
    8.  
    9. Move the camshaft forward as far as it will go. End-play should be 0.004-0.008 inch (0.1-0.2mm). Maximum allowed end-play is 0.016 inch (0.4mm).
    10.  

  2.  
  3. Lubricate the camshaft journals
  4.  
  5. Install or connect the following:

    Camshafts
     
    Thrust case to the left cylinder head and torque the fasteners to 108 inch lbs. (13 Nm)
     
    New camshaft seal (lubricate the seal lip), until it is flush with the cylinder head surface
     
    Camshaft sprocket and torque the bolt to 75 ft. lbs. (101 Nm)
     
    Cylinder head(s)
     
    Lower intake manifold using new gaskets
     

  6.  
  7. The rocker arm shafts are hollow and used as a lubrication oil duct. Be sure all valve train parts are clean. Check the rocker arm mounting portion of the shafts for wear or damage, replace if necessary. Check all oil holes for clogging with a small wire and clean as required. If any rockers were removed, lubricate and install the on the shafts in their original positions.
  8.  
  9. Install or connect the following:
    WARNING
    It is very important that all valve timing marks align properly or engine damage will result.



    Rocker arm/shaft assemblies
     
    Timing belt
     

  10.  
  11. Inspect the spark plug tube seals located on the ends of each tube. These seals slide onto each tube to seal the cylinder head cover to the spark plug tube. If these seals show signs of hardness and/or cracking, replace them.
  12.  
  13. Clean all sealing surfaces.
  14.  
  15. Install or connect the following:

    Cylinder head covers using new gaskets and torque the bolts to 88 inch lbs. (10 Nm)
     
    Spark plug cables
     
    Upper intake manifold (plenum) using a new gasket and torque the bolts to 13 ft. lbs. (18 Nm)
     
    Plenum support brackets
     
    EGR tube
     
    Throttle and speed control cables
     
    TP sensor and IAC motor electrical connectors
     
    MAP and IAT sensor electrical connectors
     
    Air inlet resonator, air inlet hose and air cleaner housing cover
     
    All remaining electrical connectors
     
    Air tube connections and tighten them
     
    Negative battery cable
     

  16.  
  17. Refill the cooling system.
    NOTE
    An oil and filter change is recommended whenever a cylinder head has been removed since coolant can get into the oil system.


    WARNING
    Operating the engine without the proper amount and type of engine oil will result in severe engine damage.

  18.  
  19. Start the engine and check for leaks, abnormal noises and vibrations. Bleed the cooling system.
  20.  

Front Bank
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect battery negative cable from remote negative terminal on shock tower and properly isolate to prevent accidental reconnection.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Timing belt
     
    Camshaft sprocket
     
    Engine coolant thermostat housing
     
    PCV breather hose and cylinder head cover
     
    Spark plug cables
     
    Cylinder head cover
     

  8.  
  9. Install Special Tool MD-998443 (auto lash adjuster retainers) to hold the lash adjuster into position when the rocker arms are serviced.
  10.  
  11. Mark rocker arm shaft assemblies for later reinstallation.
    NOTE
    The rocker arms are under significant pressure from the valve springs.

  12.  
  13. Loosen rocker arm shaft bolts 1 / 2 turn at a time and in a crisscross pattern.
  14.  
  15. Continue removing:

    Thrust case from front (left side) cylinder head assembly
     
    Camshaft from the rear of the head
     
    Camshaft from rear of the head
     

  16.  

Rear Bank
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect battery negative cable from remote negative terminal on shock tower and properly isolate to prevent accidental reconnection.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Timing belt
     
    Camshaft sprocket
     
    Intake manifold upper plenum
     
    PCV and breather hoses
     
    Spark plug cables
     
    Distributor
     
    Cylinder head cover
     

  8.  
  9. Install Special Tool MD-998443 (auto lash adjuster retainers) to hold the lash adjuster into position when the rocker arms are serviced.
  10.  
  11. Mark rocker arm shaft assemblies for later reinstallation.
    NOTE
    The rocker arms are under significant pressure from the valve springs.

  12.  
  13. Loosen rocker arm shaft bolts 1 / 2 turn at a time and in a crisscross pattern.
  14.  
  15. Continue removing:

    Thrust case from front (left side) cylinder head assembly
     
    Camshaft from the rear of the head
     
    Camshaft from rear of the head

    Click image to see an enlarged view

    Fig. Use of Special Tool MD998443-lash adjuster retainer



    Click image to see an enlarged view

    Fig. Camshaft removal overview, front bank-2.5L engine



    Click image to see an enlarged view

    Fig. Camshaft removal overview, rear bank-2.5L engine



    Click image to see an enlarged view

    Fig. Exploded view of rocker shaft-2.5L and 3.0L engines



    Click image to see an enlarged view

    Fig. Roller rocker arm-2.4L, 2.5L and 3.0L engines

     

  16.  

To install:

  1. Lubricate camshaft journals.
  2.  
  3. Carefully install camshaft(s) into the cylinder head(s).
  4.  
  5. Install or connect the following:
    NOTE
    Camshaft must be installed before the camshaft seal is installed.



    Thrust case on front (left side) cylinder head and tighten fasteners to 108 inch lbs. (13 Nm)
     
    Camshaft seal(s)
     



    Camshaft sprocket(s) and tighten to 65 ft. lbs. (88 Nm)
     
    Timing belt
     

  6.  
  7. Install rocker arm assemblies in correct order as removed.
  8.  
  9. Tighten the rocker arm assemblies in sequence to 276 inch lbs. (31 Nm)
  10.  
  11. Remove Special Tools MD-998443 (auto lash adjuster retainers)
  12.  
  13. Install cylinder head covers and intake manifold/plenum.
  14.  

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

    Negative battery
     
    Timing chain and secondary chain tensioner bolts
     
    Camshaft bearing caps
     
    Camshafts, secondary chain and tensioner as an assembly
     
    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 or connect the following:

    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.

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

    4.  

  4.  

3.0L Engine
Front Bank
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect battery negative cable from remote negative terminal on shock tower and properly isolate to prevent accidental reconnection.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Timing belt
     
    Camshaft sprocket
     
    Engine coolant thermostat housing
     
    PCV breather hose and cylinder head cover
     
    Spark plug cables
     
    Cylinder head cover
     

  8.  
  9. Install Special Tool MD-998443 (auto lash adjuster retainers) to hold the lash adjuster into position when the rocker arms are serviced.
  10.  
  11. Mark rocker arm shaft assemblies for later reinstallation.
    NOTE
    The rocker arms are under significant pressure from the valve springs.

  12.  
  13. Loosen rocker arm shaft bolts 1 / 2 turn at a time and in a crisscross pattern.
  14.  
  15. Continue removing:

    Thrust case from front (left side) cylinder head assembly
     
    Camshaft from the rear of the head
     
    Camshaft from rear of the head
     

  16.  

Rear Bank
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect battery negative cable from remote negative terminal on shock tower and properly isolate to prevent accidental reconnection.
  4.  
  5. Drain the cooling system.
  6.  
  7. Remove or disconnect the following:

    Timing belt
     
    Camshaft sprocket
     
    Intake manifold upper plenum
     
    PCV and breather hoses
     
    Spark plug cables
     
    Distributor
     
    Cylinder head cover
     

  8.  
  9. Install Special Tool MD-998443 (auto lash adjuster retainers) to hold the lash adjuster into position when the rocker arms are serviced.
  10.  
  11. Mark rocker arm shaft assemblies for later reinstallation.
    NOTE
    The rocker arms are under significant pressure from the valve springs.

  12.  
  13. Loosen rocker arm shaft bolts 1 / 2 turn at a time and in a crisscross pattern.
  14.  
  15. Continue removing:

    Thrust case from front (left side) cylinder head assembly
     
    Camshaft from the rear of the head
     
    Camshaft from rear of the head

    Click image to see an enlarged view

    Fig. Use of Special Tool MD998443-lash adjuster retainer



    Click image to see an enlarged view

    Fig. Exploded view of rocker shaft-2.5L and 3.0L engines



    Click image to see an enlarged view

    Fig. Roller rocker arm-2.4L, 2.5L and 3.0L engines

     

  16.  

To install:

  1. Lubricate camshaft journals.
  2.  
  3. Carefully install camshaft(s) into the cylinder head(s).
  4.  
  5. Install or connect the following:
    NOTE
    Camshaft must be installed before the camshaft seal is installed.



    Thrust case on front (left side) cylinder head and tighten fasteners to 108 inch lbs. (13 Nm)
     
    Camshaft seal(s)
     



    Camshaft sprocket(s) and tighten to 65 ft. lbs. (88 Nm)
     
    Timing belt
     

  6.  
  7. Install rocker arm assemblies in correct order as removed.
  8.  
  9. Tighten the rocker arm assemblies in sequence to 276 inch lbs. (31 Nm)
  10.  
  11. Remove Special Tools MD-998443 (auto lash adjuster retainers)
  12.  
  13. Install cylinder head covers and intake manifold/plenum.
  14.  

 
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