GUIDE 7N2051 - Caterpillar

Intake Manifold
The intake manifold is a one-piece design. The intake manifold is made of cast aluminum. The throttle body is attached to the front of the intake manifold. The fuel rail assembly with eight separate fuel injectors is retained to the intake manifold by four studs. The fuel injectors are seated in the individual manifold bores with o-ring seals. A Manifold Absolute Pressure (MAP) sensor is mounted on the top of the intake manifold and sealed by an o-ring seal. The MAP sensor is held in place with a retaining bolt. The evaporative emission canister solenoid is located in the front of the intake manifold. The positive crankcase ventilation (PCV) system is internally cast into the intake manifold. There is not a PCV valve. A splash shield is installed under the intake manifold. The shield prevents hot oil from contacting the bottom of the intake manifold, which maintains the air inlet charge density.Exhaust Manifold
The two exhaust manifolds are constructed of cast stainless steel. The exhaust manifolds direct exhaust gases from the combustion chambers to the exhaust system.