Exhaust Gas Recirculation: Description and Operation

Valve Installation:

EGR Valve Installed:

Engine - Mechanical
On North American vehicles, the exhaust gas recirculation (EGR) system and engine part-load breather are revised to reduce the possibility of oil vapor deposits adversely affecting the operation of the EGR valve. For reasons of commonality, the changes to the part-load breather are carried over to vehicles in all other markets.

EGR System
An adapter, with connection points for the transfer pipe and the FOR valve function sensor, is introduced between the EGR valve and the intake manifold. Since the exhaust gases no longer pass through the internal passage in the intake manifold, they remain at a higher temperature, reducing the possibility of contaminants in the gases being deposited on the valve.
The previous connection points on the intake manifold, for the transfer pipe and the valve function sensor, are deleted.