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Home >> Audi >> 2017 >> A7 Quattro Competition >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (4.0L - Cooling System - Engine Code(S): CEUC & CRDB) >> 19 Cooling System >> Coolant Pipes >> Coolant Pipes, Removing And Installing >> Upper Rear Coolant Pipe, Removing And Installing >> Removing

Upper Rear Coolant Pipe, Removing And Installing: Removing

WARNING: This page is about a different car, the 2015 Audi S7, 2015 Audi RS 7, 2014 Audi S7, 2014 Audi RS 7, and 2013 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.

-- Drain the coolant, refer to Draining .

-- Remove the left and right front muffler, refer to FRONT MUFFLER, REMOVING AND INSTALLING .

-- Remove the plenum chamber bulkhead, refer to Bulkhead .

-- Remove the connectors from the bracket, disconnect them and then free up the wires.

Fig 1: Identifying Connectors
GWWA24-11124Courtesy of AUDI OF AMERICA, LLC

1 -

for Oxygen Sensor after Three Way Catalytic Converter -G130- item -3-

4 -

for Heated Oxygen Sensor -G39- item -2-

-- Free up the wiring harness for the Heated Oxygen Sensor 2 -G108- and Oxygen Sensor 2 after Catalytic Converter -G131-.

NOTE:

The catalytic converter for the cylinder bank 1 (right) is on the left in the vehicle.

Fig 2: Identifying Nuts
GWWA26-11198Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -arrows- from the cylinder bank 1 (right) and then remove the catalytic converter in the left of the vehicle, toward the rear.

NOTE: The catalytic converter for the cylinder bank 2 (left) is on the right in the vehicle.

-- Remove the nuts -arrows- from the cylinder bank 2 (left) and then remove the catalytic converter on the right in the vehicle, toward the rear.

Fig 3: Identifying Nuts
GWWA26-11199Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -1, 4, 7-, then remove the retaining plates -2, 6-.

-- Remove the coolant lines -3, 5- from the left and right turbocharger.

Fig 4: Identifying Retaining Plates And Bolts
GWWA21-10705Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -1, 3- and then press the lower rear coolant pipe -2- toward the rear.

Fig 5: Identifying Lower Rear Coolant Pipe And Bolts
GWWA19-11468Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -1, 2, 3- and then remove the turbocharger support -4-.

Fig 6: Turbocharger Support Bolts
GWWA21-10706Courtesy of AUDI OF AMERICA, LLC
NOTE: Depending on the version another bolt is installed on the right of the coolant line.

-- Remove the bolts -1 and 2-.

CAUTION:

Danger of causing damage to the coolant pipe.

  • Do not bend the coolant pipe.

-- Remove the upper rear coolant pipe from the right timing chain guard -arrow-.

Fig 7: Identifying Bolts
GWWA19-11417Courtesy of AUDI OF AMERICA, LLC