The exhaust gas recirculation system reduces the toxicity of exhaust gases.

Through the recirculation system, some of the gases are returned to the cylinders for afterburning.

Valve and heat exchanger of the exhaust gas recirculation system: 1 - valve electric drive; 2 - valve electrical connector block; 3, 7 - valve body cooling pipes; 4, 5 - cooling system connection pipes; 6 - heat exchanger; 8 - flange for mounting to the exhaust manifold; 9 - valve

The main element of the system is the valve, which at high crankshaft speeds allows exhaust gases to pass through the intake tract for combustion.

Before entering the intake, the exhaust gases are cooled in the recirculation system cooler.

Removing the valve and recirculation system cooler

Disconnect the negative terminal of the battery

Replacing recirculation parts Cummins ISF2.8 Gazelle Next

For easy access, remove the air filter

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Removing the air supply hose

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Draining the coolant from the engine cooling system

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Disconnect the wiring block from the valve actuator connector

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Unscrew the bolt securing the bypass pipe to the bracket on the engine

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Unscrew the two bolts securing the pipe to the intake pipe

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Unscrew the two bolts securing the pipe to the recirculation valve

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Removing the bypass pipe

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

The flange securing the pipe to the intake pipe is sealed with a rubber ring

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Squeeze the fastening clamp, slide it along the hose and disconnect the hose supplying liquid to the heater from the pipeline

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Unscrew the bolt securing the bracket of the engine cooling system pipelines

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Disconnect the cooling system pipes from the heat exchanger pipes

Replacing the Cummins ISF2.8 Gazelle Next recirculation parts

Unscrew the two bolts securing the valve to the exhaust manifold

Replacing Cummins ISF2.8 Gazelle Next recirculation parts

Unscrew the cooler mounting clamp nut

Replacing the Cummins ISF2.8 Gazelle Next EGR parts

Unclamp the clamp and remove the EGR valve assembly with the cooler

Replacing the Cummins ISF2.8 Gazelle Next EGR parts

Remove the sealing gasket

Install the EGR valve assembly with the cooler in the reverse order.

Tightening torque of the bypass bolts pipes:

  • - on the inlet manifold 10 Nm;
  • - on the recirculation system valve 24 Nm.

Fill the engine with coolant and bleed the air locks.