Lower Timing Chain Cover, Replacing: Removing

• Engine oil drained. Refer to ENGINE OIL .

All except Audi Q7/Q8:

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

Audi Q7/Q8:

Refer to the appropriate service information.

Vehicles with Secondary Air System:

-- Remove the resonator for the secondary air system. Refer to SECONDARY AIR SYSTEM RESONATOR, REMOVING AND INSTALLING .

Continuation for All Vehicles: 

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-- Free up the wires.

-- Remove the bolts -1, 2 and 3- and move the left coolant pipe to the side.

-- If necessary, unclip the oil dipstick tube -1- on the upper timing chain cover in direction of -arrow-.

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-- Remove the oil dipstick tube from the lower timing chain cover.

-- Remove the vibration damper. Refer to VIBRATION DAMPER, REMOVING AND INSTALLING .

-- Disconnect the connector -1- for the Oil Pressure Regulation Valve -N428-.

Fig 1: Identifying Oil Pressure Regulation Valve

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-- Remove the bolts -1 through 15-.

Fig 2: 15 Bolts Timing Chain Cover Tightening Sequence

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-- Pry off the lower timing chain cover.