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Secondary air system > < Checking adaption of zero position for exhaust gas recirculation valve N18

A4 Mk2

Removing and installing exhaust gas recirculation valveN18 with exhaust gas recirculation potentiometerG212
Removing and installing exhaust gas recirculation valve -N18- with exhaust gas recirculation potentiometer -G212-
   
Removing
–  Lift off engine cover -arrows-.
  A10-10331
–  If fitted, detach cover -1- on right of engine compartment.
  A10-1030
–  Detach vent hose -2- leading to exhaust gas recirculation valve -N18-.
–  Disconnect hose -4- for crankcase breather system at air pipe.
–  Remove air pipe -1- and -3-.
  A10-10330
–  Unplug electrical connector -3- at exhaust gas recirculation valve -N18-.
–  Remove bolts -1- and -4-.
–  Remove exhaust gas recirculation valve -N18-.
  Note
Disregard -item 2-.
Installing
Installation is carried out in the reverse order; note the following:
  Note
t  Renew seals and gaskets.
t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Parts catalogue.
–  If a new exhaust gas recirculation valve -N18- is fitted, perform adaption of zero position → Chapter.
Tightening torque
  A26-10020
ComponentNm
Exhaust gas recirculation valve -N18- to connecting piece22

   

Secondary air system > < Checking adaption of zero position for exhaust gas recirculation valve N18