Grand Caravan V6-4.0L (2008)
Rocker Arm Assembly: Removal and Replacement
Removal
REMOVAL
CAUTION: The rocker arm shafts are hollow and are used as lubrication oil passages. The rocker arm and shaft assembly on the RIGHT side
of the engine has an oil passage hole from the cylinder head to the third rocker shaft support. The rocker arm shaft assembly on the LEFT side
of the engine has an oil passage hole from the cylinder head to the second rocker shaft support.
1. Remove cylinder head covers.See: Cylinder Head Assembly/Valve Cover/Service and Repair/Cylinder Head Cover - Removal
2. Identify the rocker arm assembly and rocker arms before disassembly.
3. Remove rocker arm assembly bolts.
4. Remove rocker arm assembly.
NOTE: To prevent air ingestion into lash adjusters, avoid turning rocker arm assembly upside down.
CAUTION: Do not allow rocker arm assembly to rest on lash adjusters, as damage may occur to lash adjusters and/or plastic retainers.
Disassembly
DISASSEMBLY
1. Remove rocker arm and shafts.
2. Remove dowel pin using a 4 mm screw, nut, spacer, and washer installed into the pin. Thread the screw into the pin, then loosen the nut on the
screw. This will pull the dowel out of the shaft support. Do not reuse dowel pins. Remove the rocker arms and pedestals in order.
3. Check the rocker arm mounting portion of the shafts for wear or damage. Replace if damaged or heavily worn.
4. Check shaft oil holes for clogging with small wire, clean as required.
Assembly
ASSEMBLY
CAUTION: New dowel pins must be installed when reassembling.
1. Install the rocker arms, and pedestals onto the shaft.
2. Install dowel pins. Dowel pins pass through the pedestal into the exhaust rocker shafts. Dowel pins should be pressed in until they bottom-out