Camshaft, Removing And Installing: Removing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Audi S8, 2015 Audi A8 Quattro, 2014 Audi S8, 2014 Audi A8 Quattro, and 2013 Audi S8. However, it is still accessible from the selected car via links, so may be relevant.

-- Remove the affected ignition coils, refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .

-- Remove the affected high pressure pump, refer to HIGH PRESSURE PUMP, REMOVING AND INSTALLING .

-- Remove the affected high pressure line, refer to HIGH PRESSURE PIPE, REMOVING AND INSTALLING .

-- Remove the affected camshaft timing chain from camshafts, refer to REMOVING .

-- Remove the noise insulation -arrow-.

Fig 1: Removing Noise Insulation

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-- Remove the camshaft locating tool T40264/3.

Fig 2: Identifying Camshaft Locating Tool T40264/3

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Fig 3: Turning Crankshaft 40 Degrees

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CAUTION:

Risk of damaging valves and piston crowns.

In the course of the following steps, the crankshaft must not stand with any piston at "TDC".

-- Turn the crankshaft 40° opposite engine rotation out of the "TDC" position using the Wrench - 21 mm T40263 and Crankshaft Turning Tool T40272 in direction of -arrow-.

Cylinder Bank 1 (Right):

Fig 4: Removing Bolts And Pressing Fuel Line Forward

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-- Remove the right coolant pipe, refer to RIGHT COOLANT PIPE, REMOVING AND INSTALLING .

NOTE: Do not change the shape of the fuel line.

-- Remove the bolts -arrows- and press the fuel line -1- forward.

-- Disconnect the connectors -1 and 2- and free up the wiring harness.

Fig 5: Disconnecting Connectors And Free Up Wiring Harness

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-- Attach both of the camshaft adjusters without camshaft timing chains to the cylinder head and then loosely screw on the bolts -1, 2-.

Fig 6: Locating Camshaft Adjuster Bolts

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-- Position the Wrench - Camshaft T40269 onto the camshaft adjuster for the right exhaust camshaft and counterhold with a wrench -2-.

NOTE: To loosen the bolt for the camshaft locating tool T40264/1, the exhaust camshaft must be secured from turning.

-- Tighten the bolt -1- by hand.

Fig 7: Positioning Wrench - Camshaft T40269 Onto Camshaft Adjuster For Right Exhaust Camshaft And Counterhold With Wrench

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-- Hold the exhaust camshaft in position with the wrench.

-- Remove the left bolt -left arrow- from the camshaft locating tool T40264/1.

Fig 8: Locating Right Bolt -Right Arrow- On Camshaft Locating Tool T40264/1

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-- Release the wrench.

When doing this, the exhaust camshaft turns to the right one turn.

-- Position the Wrench - Camshaft T40269 onto the camshaft adjuster for the left intake camshaft and counterhold with a wrench -2-.

Fig 9: Positioning Wrench - Camshaft T40269 Onto Camshaft Adjuster For Right Intake Camshaft And Counterhold With Wrench

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-- Tighten the bolt -1- by hand.

NOTE: To loosen the bolt for the camshaft locating tool T40264/1, the intake camshaft must be secured from turning.

-- Hold the intake camshaft in position with the wrench.

-- Remove the right bolt -right arrow- from the camshaft locating tool T40264/1.

Fig 10: Locating Right Bolt -Right Arrow- On Camshaft Locating Tool T40264/1

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-- Release the wrench.

When doing this, the intake camshaft turns to the right one turn.

-- Remove the camshaft locating tool T40264/1.

-- Remove the bolts -1 and 2- by counterholding with the wrench and the Wrench - Camshaft T40269. Remove the camshaft adjuster.

Fig 11: Locating Camshaft Adjuster Bolts

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Cylinder Bank 2 (Left):

Fig 12: Identifying Exhaust Camshaft Adjustment Valve 1 -N318- And Camshaft Adjustment Valve 2 -N208-

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-- Disconnect the connectors:

3 -

for Exhaust Camshaft Adjustment Valve 2 -N318-

4 -

for Camshaft Adjustment Valve 2 -N208-

-- Move the electrical wiring harness to the side.

NOTE: Ignore -1 and 2-.

-- Remove the bolts -arrows- and move the adjusting element vacuum pipe to the side.

Fig 13: Removing Bolts And Move Adjusting Element Vacuum Pipe To Side

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NOTE:

Do not remove ball head -2-.

Ignore -1-.

-- Remove the bolts -arrows- and press the fuel line forward.

Fig 14: Removing Bolts And Press Fuel Line Forward

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NOTE: Do not change the shape of the fuel line.

-- Attach both of the camshaft adjusters without camshaft timing chains to the cylinder head and then loosely screw on the bolts -1, 2-.

Fig 15: Removing Bolts By Counterholding With Wrench And Wrench - Camshaft T40269

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-- Position the Wrench - Camshaft T40269 onto the camshaft adjuster for the left intake camshaft and counterhold with a wrench -2-.

-- Tighten the bolt -1- by hand.

NOTE: To loosen the bolt for the camshaft locating tool T40264/2, the intake camshaft must be secured from turning.

-- Hold the intake camshaft in position with the wrench.

Fig 16: Positioning Wrench - Camshaft T40269 Onto Camshaft Adjuster For Left Intake Camshaft And Counterhold With Wrench

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-- Remove the left bolt -left arrow- from the camshaft locating tool T40264/2.

Fig 17: Locating Right Bolt -Right Arrow- On Camshaft Locating Tool T40264/2

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-- Release the wrench.

When doing this, the intake camshaft turns to the right one turn.

-- Position the Wrench - Camshaft T40269 onto the camshaft adjuster for the left exhaust camshaft and counterhold with a wrench -2-.

Fig 18: Positioning Wrench - Camshaft T40269 Onto Camshaft Adjuster For Left Exhaust Camshaft And Counterhold With Wrench

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-- Tighten the bolt -1- by hand.

NOTE: To loosen the bolt for the camshaft locating tool T40264/2, the exhaust camshaft must be secured from turning.

-- Hold the exhaust camshaft in position with the wrench.

-- Remove the right bolt -right arrow- from the camshaft locating tool T40264/2.

Fig 19: Locating Right Bolt -Right Arrow- On Camshaft Locating Tool T40264/2

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-- Release the wrench.

When doing this, the exhaust camshaft turns to the right one turn.

-- Remove the camshaft locating tool T40264/2.

-- Remove the bolts -1 and 2- by counterholding with the wrench and the Wrench - Camshaft T40269. Remove the camshaft adjuster.

Fig 20: Removing Bolts By Counterholding With Wrench And Wrench - Camshaft T40269

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Continuation for Both Cylinder Banks:

Fig 21: Tightening Specification And Sequence For Camshaft Housing

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-- Loosen and remove the bolts in the following sequence: -22 to 1-.

NOTE:

The left camshaft housing is shown.

Proceed in the same way with right camshaft housing.

-- Screw in the M6 x 30 bolts evenly into the threaded openings -arrows- to carefully loosen the camshaft housing out of the bonding.

Fig 22: Locating Bolts

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NOTE:

The left camshaft housing is shown in the illustration.

Proceed in the same way with right camshaft housing.

-- Mark the assignment of the camshafts for installation later.

-- Remove the camshafts and place them on a clean surface.