Exhaust Gas RECIRCULATION: Description

All diesel models are equipped with exhaust gas recirculation (EGR). The system reduces oxides of nitrogen (NOx) by allowing a small quantity of exhaust gas to enter the intake manifold. This lowers combustion chamber temperatures and reduces NOx formation.

The 5-cylinder system consists of an EGR valve, thermal vacuum valve, switch-over valves, vacuum control valve, several orifices and connecting hoses.

The 4-cylinder system consists of a control unit, electric switch-over valve, throttle valve housing, corrugated tube to return gases, several orifices and a TDC transmitter.