Pistons, Removing And Installing: Removing

WARNING: This page is about a different car, the 2024 Audi A8 Quattro, 2023 Audi A8 Quattro, and 2022 Audi A8 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Engine secured on the engine and transmission holder. Refer to ENGINE, SECURING TO ENGINE AND TRANSMISSION HOLDER .

-- Remove the corresponding cylinder head. Refer to CYLINDER HEAD, REMOVING AND INSTALLING .

-- Remove the oil pan upper section. Refer to OIL PAN UPPER SECTION, REMOVING AND INSTALLING .

-- Remove the bolts -arrows- and remove the oil tray -1-.

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-- Mark the installation position and allocation:

Connecting rod bearing cap to cylinder and connecting rod. Refer to Figure.
Pistons to cylinder. Refer to Figure.
Connecting rod to cylinder : Connecting Rod

-- If necessary, remove the Crankshaft Locking Pin: T40069 and turn the crankshaft correspondingly.

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CAUTION:

Risk of damaging the engine by the timing mechanism skipping.

- Only let the engine turn in the direction of engine rotation.

-- Turn the crankshaft using the Wrench - 21mm: T40263 and Adapter: T40314 -arrow- while paying attention to or guiding the camshaft timing chain.

-- Remove the corresponding bolts -arrows- and remove the connecting rod bearing cap.

Fig 1: Connecting Rod Bearing Cap

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CAUTION:

There is a risk of damaging the oil spray jets through distortions.

- Never bend the oil spray jets.

-- Remove the pistons while paying attention to the oil spray jets.

-- Remove the circlip -2- from the piston pin eye.

Fig 2: Locating Components of Piston

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-- Remove the piston pin -3- using the Pilot Drift: VW222A .

TIP:

If difficult to move, heat the pistons to approximately 60 °C (140 °F).

-- Remove the pistons -1- from the connecting rod -4-.