Pontiac Problems? Ask a Mechanic for Answers ASAP
Below are directions to remove both heads:\
LEFT SIDE (FRONT)
See Figures 2 and 3
Fig. Fig. 2: Exhaust manifold heat shield removal and installation
Fig. Fig. 3: Exploded view of the exhaust manifold
RIGHT SIDE (REAR)
See Figures 4 and 5
Fig. Fig. 4: Remove the upper heat shield ...
Fig. Fig. 5: ... then remove the lower heat shield
See Figure 6
Fig. Fig. 6: After the heat shields are removed, unfasten the retainers and remove the exhaust manifold
Before installation, liberally coat the fasteners for the manifold, with a suitable anti-seize compound.
This engine uses a sequential multiport fuel injection system. During installation, you must attach the injector electrical connectors to their appropriate fuel injector, or exhaust emissions and engine performance may be seriously affected.
See Figure 2
Fig. Fig. 2: Exploded view of the upper intake manifold assembly-3.4L engine
On some applications, you may want to remove the throttle body.
See Figure 3
Fig. Fig. 3: Lower intake manifold
WARNING An oil leak may result if the vertical attaching bolts are not tightened before the diagonal attaching bolts.
It is usually best to engage the services of a local machine shop to perform these checks.
Fig. Fig. 2: Cylinder head mounting and bolt torque sequence-3.4L engine