REMOVAL & INSTALLATION
The engines covered by this information have rocker shafts (rocker shaft and arm assemblies). The 3.3L and 3.8L engines' rocker shaft assemblies are easily removed without removing the cylinder heads or camshafts. However, the 3.0L engines are more involved.
The all 3.0L engines have rocker shaft assemblies which cannot (or should not) be removed without removal of the camshafts-refer to the camshaft removal procedures found in this section.3.0L Engines
The rocker arm shaft assemblies on these engines are held in place by the cylinder head bolts. When the cylinder head bolts are removed, since this releases the pressure on the cylinder head gasket, the head gasket must be replaced. Refer to the cylinder head procedures found later in this section for the removal and installation procedures of the rocker arm shafts.3.3L and 3.8L Engines
See Figure 1
- Remove the upper intake manifold assembly. Refer to the intake manifold procedure found later in this section.
- Remove the rocker arm covers.
- Remove the four rocker shaft bolts and retainers.
- Remove the rocker arms and shaft assembly.
- If the rocker arm assemblies are disassembled for cleaning or replacement of parts, assemble the rocker arms in their original position. Take note of their positions before dismantling the assembly.
- Install the rocker arm and shaft assemblies with the stamped steel retainers in the four positions, tighten the bolts to 21 ft. lbs. (28 Nm).
- Install the rocker arm covers.
- Install the upper intake manifold according to the intake manifold procedures found later in this section.