The intake charged air is routed to the individual cylinders by an intake manifold bolted to the cylinder head with twelve mounting bolts. The mating surfaces of the intake manifold and cylinder heads are machined. The intake manifold is sealed to the cylinder heads with six single port gaskets. If the manifold is removed, new gaskets must be installed to maintain seal under higher boost pressure. A turbo-boost pressure sensor is mounted to the side of the intake manifold with two bolts. An O-ring seals the boost sensor where it enters a hole in the manifold. An air temperature sensor is located on the bottom center of the manifold. See Figure
1.Air Inlet Elbow
2.Air Intake Manifold
Repair or Replacement of Intake Manifold
Repair of the intake manifold is not authorized by Detroit Diesel.
To determine if repair or replacement of the intake manifold is necessary, perform the following procedure. See Figure
Repair or Replacement of Intake Manifold Flowchart
Removal of Intake Manifold
Clean the mounting area between intake manifold and cylinder head to prevent any foreign material from falling into the cylinder head intake ports.
Remove the intake manifold as follows:
Disconnect the air inlet elbow clamp from the intake manifold. See Figure