Exhaust Gas RECIRCULATION Auxiliary Cooler

Removing

-- Drain the coolant. Refer to COOLING SYSTEM, DRAINING AND FILLING .

-- Remove the bolt -arrow- on the preliminary catalytic converter strap.

Fig 1: Identifying Bolt -Arrow- From Exhaust Pipe

Courtesy of AUDI OF AMERICA, LLC

-- Carefully pull the engine cover -arrows- off the 4 bolts one after the other.

Fig 2: Identifying Engine Cover -Arrows-

Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -1- and -2- and then remove the heat shield from the turbocharger.

Fig 3: Identifying Bolts -1 To 2- And Turbocharger Heat Shield

Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -arrows-.

Fig 4: Identifying Nuts -Arrows-

Courtesy of AUDI OF AMERICA, LLC

-- Remove the preliminary catalytic converter from the turbocharger and push it toward the rear.

-- Remove the bolts -1- and -2-.

Fig 5: Connecting Pipe And Bolts

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Ignore -3 and 4-.

-- Remove the bolts -1- and -2- and remove the rear coolant pipe from the exhaust gas recirculation auxiliary cooler.

Fig 6: Identifying Bolts -1 And 2-, Clamp -3- And Electrical Connector -4-

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Ignore -3 and 4-.

-- Disconnect the vacuum hose -1- from the vacuum actuator and remove the exhaust gas recirculation (EGR) cooler switch-over valve 2 -N381- -3- from the bracket.

Fig 7: Identifying Bolts -Arrows- And Egr Auxiliary Cooler Removal

Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolt -2- and remove the left rear coolant pipe from the exhaust gas recirculation auxiliary cooler.

-- Remove the screws -arrows- and remove the exhaust gas recirculation auxiliary cooler.

Installing

Install in reverse order of removal. Note the following:

Tightening specifications, refer to EXHAUST GAS RECIRCULATION OVERVIEW .

NOTE:

Replace the seals and O-rings.

-- Install the left rear coolant pipe to the exhaust gas recirculation auxiliary cooler. Refer to LEFT REAR COOLANT PIPE ON EXHAUST GAS RECIRCULATION AUXILIARY COOLER .

-- Install the rear coolant pipes. Refer to REAR COOLANT PIPE .

-- Install primary catalytic converter. Refer to PRIMARY CATALYTIC CONVERTER .

-- Fill with coolant COOLING SYSTEM, DRAINING AND FILLING => Filling .