Category Archives: 6.7L Power Stroke

The SCR reduces NOx in the exhaust. To do this the SCR system uses a ceramic catalyst that has been coated with copper and iron, and injecting DEF into the exhaust stream.

The DOC is a ceramic catalytic converter which oxidizes hydrocarbons in the exhaust and generates heat for the SCR and DPF to function properly.

The turbocharger down pipe is double- walled to help retain heat for the after treatment system. It connects to the turbocharger with a V-band clamp connector.

Exhaust gases exit the exhaust ports into the inboard exhaust manifolds and are directed to the dual turbine inlet of the turbo through the right and left side up-pipes. The exhaust gas and heat spins the turbine wheel inside the turbocharger. The turbine wheel spins the compressor wheel(s) via their common shaft. Some of the… Read More »

The PCM provides a duty cycle to the solenoid which changes the vacuum flow to the actuator causing the wastegate to open and allow exhaust gases to bypass the turbine. The wastegate helps maintain the required intake manifold pressure. It is used when mostly when intake manifold pressure needs to be decreased quickly. When the… Read More »

The cooling fan is mounted on the front of the engine and is controlled by the PCM.

The TCM is mounted under the vehicle, on the driver side outside the frame rail. The TCM controls the operation of the transmission.

The GPCM is mounted under the right side battery box. The PCM commands the GPCM to power the individual glow plugs, which the GPCM does by providing battery voltage. The GPCM is also responsible for powering the heaters used in the reductant system.

The reductant dosing module is mounted next to EGT12 sensor. The reductant dosing module is the part that injects the Diesel Exhaust Fluid (DEF) into the exhaust system.

The fuel pump relay is located in the Battery Junction Box (BJB). The PCM controls when the relay is on and off.