Exhaust gas recirculation system

Notes:

• ◆ The exhaust gas recirculation (EGR) system is actuated from the diesel direct injection system control unit -J248 by way of the EGR valve -N18 to the mechanical EGR valve.
• ◆ The mechanical EGR valve with its conical valve tappet permits varying opening cross-sections with varying valve lift.
• ◆ Clocked actuation means any valve position is possible.
• ◆ The EGR system is shut off after approximately 10 minutes' idling.
• ◆ For lengthier measurements, restart engine or briefly increase engine speed above idling speed. Then repeat measurement.
• ◆ Secure all hose connections with standard hose clamps:

=> Parts List

• ◆ Always replace gaskets and self-locking nuts.