The GPCM is located under the passenger side battery box. The glow plug system is electronically controlled by the PCM. The PCM monitors the ambient temperature, ECT and BARO sensors to control glow plug operation. The GPCM controls the glow plugs and the reductant system heating elements. When required, the PCM supplies a signal toโฆ Read More »
The crankcase vent oil separator is attached to the left valve cover. The engine crankcase vent oil separator, separates the oil from crankcase vapors and returns it to the crankcase through the valve cover. The vapors are routed into the intake ducting at the lower intake, before the turbo inlet.
In the picture you can see the intake manifold port on the bottom and the valve cover cavity on the top.
The intake manifold/valve cover for each cylinder head are incorporated into one piece. The air flows from the upper intake manifold into the top of the valve cover and across to the intake ports.
The upper intake manifold directs pressurized air from the lower intake manifold to the intake manifold/valve covers. The upper intake manifoldย contains two intake noise mufflers to reduce intake noise.
After leaving the turbocharger outlet the air goes through the CAC and then through the intake throttle body before it is mixed with exhaust gases from the EGR valve. The blue line represents the flow of cooled intake air and the red line represents the flow of EGR gases.
The lower intake manifold is on the top of the engine and intake air passes through it twice. The first time it flows through the lower intake manifold before going to the turbocharger inlet. Crankcase vapors are pulled into the lower intake manifold with the air on its way to the turbocharger.
The intake throttle body is located on the top of the engine, attached to the lower intake manifold. The intake throttle body controls air flow into the intake air system.
The CAC is located on the left side of the engine, on top of the fender well. The CAC is a air-to-coolant heat exchanger used to reduce the temperature of the compressed air from the turbocharger prior to entering the combustion chambers. Cooler air is denser (improving volumetric efficiency), resulting in increased power.
The chassis cab use a standard Variable Geometry Turbocharger (VGT) operated with engine oil pressure that is controlled by the PCM. This turbocharger does not incorporate a wastegate.