OEM Chrysler 300M Rocker Arm

Chrysler 300M Rocker Arm Parts and Q&A

• Intake Rocker Arm
  4573459
  Q: How to Remove and Assemble Rocker Arm Shafts and Assembly on Chrysler 300M?

  A:

  The shafts for the rocker arms are hollow and contain oil and only the right side assembly has an oil passage leading from the cylinder head to the third rocker shaft support, while the left side has an oil path from the cylinder head to the second rocker shaft support. First, remove the cylinder head covers and locate the rocker arm assembly and its rocker arms. Next, unbolt the rocker arm assembly and take it apart, making sure not to overturn it so air doesn't enter the lash adjusters and checking that it doesn't put pressure on the lash adjusters when you change its position. Use only a 4 mm screw, nut, spacer and washer while taking out the dowel pin during disassembly, so they don't get used again and remove the rocker arms and pedestals as they come out. Inspect the shafts' mounting parts on the rocker arms and if they are damaged, install replacement mounting kits and clean any obstructions in the oil holes. Assembly begins by setting up new dowel pins and inserting both rocker arms and pedestals onto the shaft, so that both upper rows of notches are visible, with the right set being placed toward the engine's back and the left at its front. Install the dowel pins and press them into the rocker shaft in the pedestal so they won't come loose and carefully check all lash adjusters to ensure the caps are in place. While the rocker arm and shaft assembly is installable before or after putting in the cylinder head, it is considered best to wait until after. Slide the Camshafts to neutral and reduce spring loading, then assemble the rocker arm and shaft so that their ID marks are facing in the opposite direction for each head. To finish, tighten all the rocker arm/shaft assembly bolts in the pattern shown in the instructions, each to 31 Nm (275 in. lbs.).