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Home >> Audi >> 2023 >> S8 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Cylinder Head, VALVETRAIN Servicing 8-Cylinder 4.0L 4V TFSI Engine Ea825 >> 15 Cylinder Head, VALVETRAIN >> Timing Chain Cover >> Timing Chain Cover, Removing And Installing >> Upper Timing Chain Covers, Removing And Installing >> Removing

Upper Timing Chain Covers, Removing And Installing: Removing

Depending on the model preliminary work may be required: TIMING CHAIN COVER, REMOVING AND INSTALLING .

-- Remove the rear fuel line. Refer to REAR FUEL LINE, REMOVING .

Cylinder Bank 1 (Right):

GWWA19-12538Courtesy of AUDI OF AMERICA, LLC

-- If required, free up the wiring harness.

-- Remove the double bolts -2- and bolts -1- and remove the bracket for the electrical coolant pump After-Run Coolant Pump -V51-.

-- Disconnect the connector -1- for the Camshaft Adjustment Valve 1 -N205- and free up the wire.

GWWA15-12179Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -arrows- and free up the bracket with the wiring harness.

-- Loosen and remove the bolts/double bolt in the following sequence: -8 to 1-.

Fig 1: Cylinder Bank 1 Timing Chain Cover (Right) - Tightening Sequence
GWWA15-11164Courtesy of AUDI OF AMERICA, LLC

Cylinder bank 2 (left), equipment version with particulate filter:

GWWA10-12469Courtesy of AUDI OF AMERICA, LLC

-- If necessary, remove the bolts -arrows- and remove the bracket -1-. There are different versions.

Cylinder bank 2 (left), continuation for all vehicles:

GWWA15-12180Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connectors and free up the wires.

1 -

For the Camshaft Adjustment Valve 2 -N208-

3 -

For the Exhaust Camshaft Adjustment Valve 2 -N319-

-- Remove the connector -2- from the bracket and free up the wire.

-- Remove the nuts -arrows- and push the bracket with the wiring harness to the side.

-- Remove the bracket -4- for the vacuum line from the double bolt and push it to the side.

-- Loosen and remove the bolts/double bolt in the following sequence: -8 to 1-.

Fig 2: Cylinder Bank 2 Timing Chain Cover (Left) - Tightening Sequence
GWWA15-11978Courtesy of AUDI OF AMERICA, LLC

Continuation for Both Sides: 

-- Carefully loosen and remove the timing chain cover from the bond.

CAUTION:

Risk of destroying the engine by small parts inadvertently entering with the upper timing chain cover removed.

- Cover the timing chain opening with a clean cloth.