Cylinder Head, Removing And Installing: Removing: Notes

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2017 Audi S5, 2016 Audi S5, 2016 Audi S4, 2015 Audi S5, and 2015 Audi S4. 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.

When installing, bring all cable ties back to same positions.

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 PRESSURE, REDUCING IN HIGH PRESSURE AREA .

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

Fig 1: Disconnecting Fuel Injector Connectors

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-- Disconnect the connectors on the fuel injectors.

-- Remove the affected camshaft timing chain from camshafts. Refer to CAMSHAFT TIMING CHAIN, REMOVING FROM CAMSHAFTS .

Vehicles with Hydraulic Power Steering

Fig 2: Counterholding Coolant Pump Pulley Using Pin Wrench 3212

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-- Remove the bolts for the coolant pump ribbed belt pulley, using a Wrench - Pin Type 3212 to counterhold.

-- Remove the bolts -1 and 2- and lay the power steering pump aside.

Fig 3: Dynamic Steering Installation Location

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NOTE:

The illustration shows the installation location on a vehicle with dynamic steering.

Ignore item -3- and -arrow-.

Continuation for All Vehicles

Fig 4: Clamps And Remove The Coolant Hoses

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

-- Remove the bolts -arrows-.

-- Remove the clips -1 and 4-, loosen the clamp -2- and remove the coolant hoses from the front coolant pipe.

NOTE:

Ignore item -5-.

-- Remove the threaded connection -1- and move the fuel supply hose to the side.

Fig 5: Identifying Fuel Supply Line

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-- Disconnect the connectors -2 and 3-.

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

Fig 6: Identifying Oil Dipstick Guide Tube Bolt

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

Fig 7: Identifying Vacuum Pump Hose

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Only for the Right Cylinder Head

-- Remove the upper coolant pipe. Refer to UPPER COOLANT PIPES, REMOVING AND INSTALLING .

Continuation for All

Fig 8: Identifying Bolts At Rear Of Cylinder Head

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

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

NOTE:

Depending on the version, there are different camshafts (with notches or without notches) and cylinder head bolts (with collar and without collar) installed.

Distinguishing characteristic:

Cylinder head bolts without a collar have a Polydrive wrench profile.

Cylinder head bolts with a collar have an internal multi-point wrench profile.

Camshafts with wrench clearance have notches -arrows-. The cylinder head bolts without a collar can be removed without further preliminary work. The cylinder head bolts with a collar cannot be removed without further preliminary work. The camshafts must be removed (refer to CAMSHAFT, REMOVING AND INSTALLING ) before the cylinder head bolts can be removed.

Fig 9: Camshaft Recesses

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Camshafts without notches must be removed (refer to CAMSHAFT, REMOVING AND INSTALLING ) before the cylinder head bolts can be removed.