Cylinder Head, Removing And Installing: Removing

WARNING: This page is about a different car, the 2012 Audi Q5, 2011 Audi Q5, 2010 Audi Q5, and 2009 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

The engine is installed.

NOTE:

The following information describes how to remove both cylinder heads at the same time.

If only one cylinder head will be removed, follow the applicable instructions in the following description.

WARNING:

There is a risk of injury because the fuel is under very high pressure.

Reduce the fuel pressure down to residual pressure before opening high pressure area of the fuel injection system.

-- Reduce the fuel pressure in the high pressure area, refer to FUEL SYSTEM SAFETY PRECAUTIONS => Before Opening High Pressure Fuel Injection System .

-- Remove the upper coolant pipe, refer to UPPER COOLANT PIPE, REMOVING AND INSTALLING .

-- Remove the ribbed belt, refer to RIBBED BELT, REMOVING AND INSTALLING .

-- Remove the intake manifold lower section, refer to INTAKE MANIFOLD LOWER SECTION WITH FUEL RAIL, REMOVING AND INSTALLING .

Fig 1: Removing Lower Section Of Intake Manifold With Fuel Rail

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-- Disconnect the connectors on the fuel injectors.

-- Remove the left and right timing chain covers, refer to LEFT AND RIGHT TIMING CHAIN COVERS, REMOVING AND INSTALLING .

-- Where installed, remove the bolts -arrows- for the coolant pump ribbed belt pulley for power steering pump using a Wrench - Pin Type 3212 to counterhold.

Fig 2: Counterholding Coolant Pump Pulley Using Pin Wrench 3212

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-- Where installed, remove the bolts -1 and 2- and lay the power steering pump to the side.

Fig 3: Power Steering Pump Mounting Bolts

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NOTE:

Ignore item -3- and -arrow-.

-- Disconnect the connector -3- for the Engine Coolant Temperature Sensor -G62-.

Fig 4: Front Coolant Pipe Fasteners And Engine Coolant Temperature ECT Sensor

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-- Remove the bolts -1, 2, 4 and 5- on the front coolant pipe.

NOTE:

Ignore the -arrows-.

-- Remove the nuts -arrows- and the high pressure line protective plate -1-.

Fig 5: Identifying Nuts -Arrows- And Protective Plate -1-

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-- Remove the threaded connection -2- and move the fuel supply line to the side.

Fig 6: Identifying High-Pressure Fuel Pump Components

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-- Disconnect the connectors -1 and 6-.

NOTE:

Ignore items -3, 4 and 5- and -arrow-.

-- Disconnect the right and left electrical connectors -arrows- on the camshaft adjuster actuators.

Fig 7: Disconnecting Right And Left Electrical Connectors On Camshaft Adjuster Actuators

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-- Remove the bolts -1 and 2- and free up the electrical wiring harness.

-- Remove the cylinder head cover, refer to LEFT CYLINDER HEAD COVER, REMOVING AND INSTALLING , refer to RIGHT CYLINDER HEAD COVER, REMOVING AND INSTALLING .

-- Disconnect the connector -3- on the Camshaft Position Sensor -G40-.

Fig 8: Disconnect Electrical Connector On Camshaft Position

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-- Remove the ground cable bolt -4-.

NOTE:

Ignore item -1, 2 and 5-.

-- Remove the bolts -arrows- and the bracket for the left connectors.

Fig 9: Cylinder Bank 2 Oxygen Sensor Electrical Connectors

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NOTE:

Ignore items -1 and 4-.

-- Remove the bolts -arrows- and the bracket for the right connectors.

Fig 10: Identifying Bolts -Arrows- And Right Connector Bracket

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NOTE:

Ignore items -1 and 4-.

-- Remove the bolt -arrow- and remove the oil dipstick with the guide tube.

Fig 11: Identifying Oil Dipstick Guide Tube Bolt

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-- Open the clamp and remove the vacuum hose from the vacuum pump -arrow-.

Fig 12: Identifying Vacuum Pump Hose

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-- Free up vacuum hose.

-- Remove the bolts -arrows- on the rear of the cylinder head.

Fig 13: Identifying Bolts At Rear Of Cylinder Head

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Left cylinder head: 3 bolts.
Right cylinder head: 4 bolts

NOTE:

The cams on the intake camshaft partially restrict access to the cylinder head bolts, such as bolts -1 and 2- shown in this example .

Fig 14: Intake Camshaft Partially Restrict Access To Cylinder Head Bolts, Such As Bolts Shown In This Example

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The slider on the camshaft must be pressed in the direction of -arrow A- using a plastic wedge to remove the bolt -1-.

The slider on the camshaft must be pressed in the direction of -arrow B- using a plastic wedge to remove the bolt -2-.

CAUTION:

Risk of damage.

The camshaft slider must only slide in the base-circle phase, that is the rocker arm on the slider that will be moved must not be loaded with a cam. When loosening the cylinder head bolts, follow the sequence described in the following instruction.

There is a risk of it breaking.

The camshaft sliders must not slide on the thin ribs.

-- Insert the Crankshaft Socket T40058 guide pins as follows:

Fig 15: Guide Pin And Adapter T40058

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The large diameter -arrow 1- faces the engine.
The small diameter -arrow 2- faces the adapter.

-- Rotate the crankshaft in the direction of engine rotation -arrow- using the Crankshaft Socket T40058 until the camshaft position shown in the following illustration is reached.

Fig 16: Identifying TDC With Special Tool Adapter T40058

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The openings -arrows- on the exhaust camshafts must face toward the outer side of the engine as shown in the illustration.

Fig 17: View Of Exhaust Camshafts Recesses -Arrow-
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Left Cylinder Head

Fig 18: Slide Unloaded Camshaft Slide As Far As Stop In Direction

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-- Slide the unloaded camshaft slider -B- as far as the stop in direction of -arrow-.

Right Cylinder Head

Fig 19: Slide Unloaded Camshaft Slide As Far As Stop In Direction

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-- Slide the unloaded camshaft slider -F- as far as the stop in direction of -arrow-.

Continuation for Both Cylinder Heads

Fig 20: Identifying TDC With Special Tool Adapter T40058

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-- Turn the crankshaft one full revolution (360°) in the direction of engine rotation -arrow- using the Crankshaft Socket T40058.

The threaded holes -arrows- in the camshafts must face upward.

Fig 21: Identifying Camshaft Threaded Hole Alignment
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Left Cylinder Head

Fig 22: Identifying Bolt (Left Cylinder Head)

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-- Remove the bolt -1-.

Right Cylinder Head

Fig 23: Identifying Bolt (Right Cylinder Head)

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-- Remove the bolt -2-.

Continuation for Both Cylinder Heads

Fig 24: Identifying TDC With Special Tool Adapter T40058

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-- Turn the crankshaft one full revolution (360°) in the direction of engine rotation -arrow- using the Crankshaft Socket T40058.

The openings -arrows- on the exhaust camshafts must face toward the outer side of the engine.

Fig 25: View Of Exhaust Camshafts Recesses -Arrow-
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Left Cylinder Head

Fig 26: Slide Unloaded Camshaft Sliders As Far As The Stop In Direction Of -Arrow-

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-- Slide the unloaded camshaft sliders -B and C- as far as the stop in direction of -arrow-.

Right Cylinder Head

Fig 27: Slide Unloaded Camshaft Sliders As Far As The Stop In Direction Of -Arrow-

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-- Slide the unloaded camshaft slider -F- as far as the stop in direction of -arrow-.

Continuation for Both Cylinder Heads

Fig 28: Identifying TDC With Special Tool Adapter T40058

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-- Turn the crankshaft one full revolution (360°) in the direction of engine rotation -arrow- using the Crankshaft Socket T40058.

The threaded holes -arrows- in the camshafts must face upward.

Fig 29: Identifying Camshaft Threaded Hole Alignment
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-- Remove the camshaft timing chains from the camshafts, refer to CAMSHAFT TIMING CHAIN, REMOVING FROM CAMSHAFTS .

CAUTION:

Risk of damaging valves and piston crowns.

If the camshaft timing chain was also only removed on one cylinder head, the crankshaft must not be rotated any more.

Left Cylinder Head

Fig 30: Identifying Bolts -3 Through 9- And Unloaded Camshaft Slider -A-

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-- Remove the bolts -3 through 9- while sliding the unloaded camshaft slider -A- accordingly.

-- Remove the cylinder head.

Right Cylinder Head

Fig 31: Identifying Bolts -10 Through 16- And Unloaded Camshaft Sliders -D- & -E-

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-- Remove the bolts -10 through 16- while sliding the unloaded camshaft sliders -D and E- accordingly.

-- Remove the cylinder head.