Lower Rear Coolant Pipe, Removing And Installing: Removing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 Audi S7, 2018 Audi RS 7, 2017 Audi S7, 2017 Audi RS 7, and 2016 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

When installing, re-install heat insulation sleeves at the same locations.

-- Drain the coolant. Refer to COOLANT, DRAINING AND FILLING .

-- 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.

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1 - For Oxygen Sensor after Three Way Catalytic Converter -G130- -3-

4 - For Heated Oxygen Sensor -G39- -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.

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-- 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.

-- 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.

NOTE:

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

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-- Remove the bolts -2 and 5-.

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-- Fold the heat shield boots -1 and 6- to the side.

-- Slide the heat shield boots -3- upward.

-- Loosen the hose clamps -arrows- to remove the coolant hoses from the lower rear coolant pipe -4- and then remove the coolant pipe.