A/C Compressor Input Shaft, Loosening And Tightening

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Audi S6, 2018 Audi A6 Quattro, 2018 Audi A6, 2017 Audi S6, and 2017 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If the drive plate overload protection triggers, check the A/C compressor for ease of motion before replacing the drive unit. If the A/C compressor creates friction, replace it completely.

Loosening

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WARNING:

There is a risk of scalding from hot steam and coolant.

The coolant system is under pressure when the engine is warm.
To reduce the pressure, cover the coolant reservoir cap with several cloths and then open it carefully.

-- Open the coolant reservoir cap -arrow-.

-- Turn the front wheels so that they are straight.

Courtesy of AUDI OF AMERICA, LLC

-- Remove the engine mount. Refer to ENGINE MOUNT, REMOVING AND INSTALLING [For engine(s) CREC, CREH] or ENGINE MOUNT, REMOVING AND INSTALLING [For engine(s) CTGE, CEUC] .

-- Remove the bolt -arrows-.

-- Remove the guide tube -1- for the oil dipstick from the upper part of the oil pan.

-- Remove the bolts -arrows- and remove the left engine support.

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NOTE:

For the sake of clarity, this figure shows the engine support with the coolant pipe removed. However, the coolant pipe remains installed.

Depending on the version of the coolant pipe, it may be necessary to loosen the coolant pipe on the engine and press it slightly to the side to remove the engine support.

-- Hold the A/C compressor input shaft -A- with a wrench and turn the A/C compressor drive unit -B- in direction of -arrow C-.

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Do not turn the input shaft -A-.

The input shaft can be slid into drive wheel through the boot -E- after loosening the threaded connection.

Tighten

Tightening Specifications

Refer to OVERVIEW - A/C COMPRESSOR POWER UNIT, VEHICLES, 8-CYLINDER FSI/TFSI ENGINE

-- Hold the A/C compressor input shaft -A- with a wrench and turn the A/C compressor drive unit -B- in direction of -arrow D-.

-- After tightening the A/C compressor input shaft, check the position of the boot -E-.

-- Install the engine support and the engine mount. Refer to ENGINE MOUNT, REMOVING AND INSTALLING [For engine(s) CREC, CREH] or ENGINE MOUNT, REMOVING AND INSTALLING [For engine(s) CTGE, CEUC] .