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.
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
For easy access, remove air filter
Removing the air supply hose
Draining the coolant from the engine cooling system
Disconnect the wiring block from the valve actuator connector
Unscrew the bolt securing the bypass pipe to the bracket on engine
Unscrew the two bolts securing the pipe to the intake pipe
Unscrew the two bolts securing the pipe to the valve recirculation
Removing the bypass pipe
The flange for fastening the pipe to the intake pipe is sealed with a rubber ring
We compress the fastening clamp, slide it along the hose and disconnect the hose supplying liquid to the heater from the pipeline
Unscrew the bolt securing the bracket for the engine cooling system pipes
Disconnect the cooling system pipes from the heat exchanger pipes
Unscrew the two bolts securing the valve to the exhaust manifold
Unscrew the cooler mounting clamp nut
Unclamp the clamp and remove the EGR valve assembly with the cooler
Remove the sealing gasket
Install the EGR valve assembly with the cooler in the reverse order.
Tightening torque of the bypass pipe bolts:
- - on the inlet manifold 10 Nm;
- - on the EGR valve 24 Nm.
Fill the engine with coolant and bleed the air locks.