The intake manifold is cast aluminum and connects the air induction system inlet duct to the intake ports of each cylinder head (see Figure 2-35). Features of the intake manifold include the following items:
• Mounting to the air inlet duct with bolts and a paper gasket
• Mounting to each cylinder head with bolts and studs, as well as a special composite gasket
• Support for eight injection lines, using brackets and rubber isolators
• Support for the turbocharger oil supply line, using a bracket
• Support for the fuel filter assembly
The installation of the intake manifold requires a variety of bolts and studs that are tightened in a specific sequence (see Figure 2-34). The torque specification for the intake manifold mounting bolts and studs is 34-50 N-m (25-37 Ib-ft).
