REMOVAL & INSTALLATION
The 2.8L V6 engine (B280F) is the only engine that contains rocker arms and/or shafts.2.8L 6-Cylinder Engine
See Figure 1
- Properly relieve the fuel system pressure.
- Disconnect the negative battery cable.
- Remove the air cleaner-to-throttle body hose.
- Disconnect the air pump bracket
- Remove the drivers side valve cover (if removing the drivers side rocker shaft assembly).
- Tie the upper radiator hose aside and remove the oil filler cap and carbon canister hose.
The following steps are necessary if your car has A/C and if you are removing the passenger side valve cover. If you do not need to remove the passenger side valve cover, skip them.
- Remove the A/C compressor belt and the compressor from the mounting bracket located on the passenger side of the engine. Do not remove the lines from the compressor.
- Place the compressor with the lines attached on the passenger side front shock tower and secure.
- Remove the compressor bracket.
- Remove the EGR valve.
- Remove the control pressure regulator.
- Disconnect any hoses or wires in the way. Remove the right valve cover, if necessary.
Do not jar the head while the rocker and bolts are loose, as the cylinder liner O-ring seals may break, requiring engine disassemble.
- The rocker arm bolts double as cylinder head bolts. Loosen the head bolts by reversing the torque sequence. If removing both rocker shafts, mark them left and right.To install:
- Install the rocker shafts. Follow cylinder head installation procedure for proper torque specification and sequence.
- Adjust the valve lash.
- Install the valve covers, EGR valve, control pressure regulator, air conditioning compressor and bracket and air pump.
- Attach all fuel, coolant and vacuum lines previously disconnected.
- Attach all electrical connections previously removed.
- Connect the negative battery cable.
- Start the engine and allow it to reach operating temperature.
- Adjust the timing and check for leaks.