Workshop Manual

EPA07/10 DD PLATFORM WORKSHOP MANUAL - ENGINE

8.1 DESCRIPTION AND OPERATION OF AIR INTAKE MANIFOLD AND

RELATED PARTS

On diesel engines, the intake charge air is routed to an intake manifold that is bolted to the

cylinder head with thirteen bolts. Air is then routed through the manifold and into the cylinders.

The mating surfaces of the manifold and the cylinder head are machined. The intake manifold is

sealed to the cylinder head with six rubber and steel gaskets. If the manifold is removed, new

gaskets must be installed to maintain seal under higher boost pressure. An intake manifold air

temperature sensor is installed to the intake manifold. The Exhaust Gas Recirculation (EGR)

mixer, intake throttle valve and adaptor installed to the air inlet of the intake manifold. CAC

ducting is installed on the intake throttle valve adaptor. For EPA07 engines, there is a pressure

combination sensor in the cold boost pipe, and a temperature s ensor in the intake throttle adaptor.

For EPA10 engines, these sensors are combined. The combination sensor is located in the Cold

Boost Pipe, and is used to measure air pressure and air temperature.

All information subject to change without notice.