The intake charge air is routed to the individual cylinders by an intake manifold that is bolted to the cylinder heads. The mating surface of the intake manifold and cylinder heads are machined. The intake manifold is sealed to the cylinder heads with a gasket. If the manifold is removed, a new gasket must be installed to maintain the seal under higher boost pressure. A turbo-boost pressure sensor is mounted to the intake manifold with two bolts. See Figure
2.Intake Manifold Gasket
6.Boost Pressure Sensor
8.Allen Head Screw
Intake Manifold and Related Parts
Repair or Replacement of Intake Manifold
To determine if repair or replacement of the intake manifold is necessary perform the following procedure. See Figure
Flowchart for Repair or Replacement of Intake Manifold
Removal of Intake Manifold
Remove the intake manifold as follows:
Disconnect the charge-air-cooler CAC hose from the air-gas-recirculator AGR valve.
Remove the AGR vacuum supply hose from the AGR valve.