Valve Spring, Removing And Installing

WARNING: This page is about a different car, the 2022 Audi SQ7. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Valve Keeper Tool Kit: VAS5161A with the Guide Plate: VAS5161A/38

Fig 1: Valve Keeper Tool Kit VAS5161A
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Spark Plug Socket Adapter 3/8" : VAS6919 , not illustrated
Wrench - 21mm: T40263

Fig 2: Identifying Wrench - 21mm
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Adapter: T40314

Fig 3: Adapter T40314
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Two M8 Bolts (part number N 108 063 01)

Guide Plate V6 TFSI: VAS5161A/38 , Preparing

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-- The Guide Plate V6 TFSI: VAS5161A/38 must be modified for cylinders 4 and 8.

-- Two M8 bolts (part number N 108 063 01) -1- must be installed in the Guide Plate V6 TFSI: VAS5161A/38 -2- from above.

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The bolts may extend a maximum of 5 mm underneath.
The projecting ends of the bolts will be positioned on the oil channels -3-.

Depending on the installation scenario, pay attention to using the holes and secure the Guide Plate V6 TFSI: VAS5161A/38 using the M5x40 bolts that are provided.

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For work on the other cylinders, the bolts can remain installed in the Guide Plate V6 TFSI: VAS5161A/38 .
There are four holes -a, b, c, d- in the Guide Plate V6 TFSI: VAS5161A/38 for securing on the cylinder head.

Procedure

-- Remove the engine with the transmission and subframe on the removed lock carrier downward. Refer to Engine, Removing and Installing .

-- Remove the applicable camshaft housing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .

-- Mark the allocation of the roller rocker lever and the hydraulic lifter so they can be installed again.

-- Remove the roller rocker lever with the hydraulic lifter and place them on a clean surface.

-- Remove the spark plugs using the Spark Plug Socket Adapter 3/8": VAS6919 .

-- Turn the crankshaft using the Wrench - 21mm: T40263 and Adapter: T40314 -arrow- until the pistons of the corresponding cylinder are in "bottom dead center (BDC)".

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CAUTION:

Risk of damaging camshaft timing chain.

- If the crankshaft is turned the camshaft timing chains must be guided.

-- Align the Valve Keeper Tool Kit - Guide Plate V6/V8 TFSI: VAS5161A/38 on the cylinder head while paying attention to the -A/E- markings:

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A - Exhaust side

E - Intake side

-- Tighten the bolts -arrows- for the Guide Plate V6 TFSI: VAS5161A/38 to 9 Nm.

TIP

For cylinders 4 and 8, the Guide Plate V6 TFSI: VAS5161A/38 -2- can only be secured with one bolt -2-. Therefore, to increase process safety, the two M8 bolts must be mounted in the guide plate. These bolts will be used to prevent rotation.

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-- Position the Valve Cotter Tool Kit - Punch: VAS5161/3A on the valve spring plate and loosen the stuck valve retainers with a plastic mallet.

-- Install the Valve Keeper Tool Kit - Compression Stud for VAS5161/9: VAS5161/10 in the Valve Keeper Tool Kit - Guide Plate V6/V8 TFSI: VAS5161A/38 hand-tight.

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-- Install the Valve Cotter Tool Kit - Adapter: T40012/1 with sealing ring in the corresponding spark plug thread and tighten hand-tight.

-- Connect the adapter to the compressed air using a commercially available intermediate piece -arrow- and give steady pressure.

Minimum pressure: 6 bar (87.02 psi)

CAUTION:

Risk of damaging the valves due to a pressure decrease in the cylinder.

- Never remove the guide plate or the compression stud.

- Keep the pressure in the cylinder at a minimum of 6 bar (87.02 psi).

-- Install the Retainer : VAS5161/6 with the Guide Forks M6/M8 with Threaded Studs: VAS5161/5 in the guide plate.

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-- Insert the Valve Keeper Tool Kit - Assembly Cartridge: VAS5161/8 A into the opening above the valve spring that is to be removed.

-- Engage the Valve Keeper Tool Kit - Pressure Fork: VAS5161/2 at the Engaging Device: VAS5161/6 and press the installation cartridge downward.

-- At the same time, turn the installation cartridge knurled bolt -arrow- right until points engage in the valve retainers.

-- Move the knurled bolt -arrow- left and right slightly. This presses the valve retainers apart and captures them in the assembly cartridge.

The knurled bolt slides all the way in the assembly cartridge.

-- Release the Pressure Fork: VAS5161/2 and remove the Assembly Cartridge: VAS5161/8A .

For the reinstallation of the valve springs for the exhaust valve mark the installation position with pant.

-- Remove the valve spring and the valve spring retainer.

Continuation:

Fig 4: Identifying Installation Cartridge VAS 5161/8

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If the valve retainers were removed from the assembly cartridge, they must then be inserted into the Valve Keeper Tool Kit - Valve Insertion Device : VAS5161/18 .

The large diameter of the valve retainers point upward.

-- Press the cartridge from above onto the insertion device and valve retainers.

-- Insert the valve spring and valve spring retainer in their original position:

Intake valve installation position. Refer to Figure.
Exhaust valve installation position. Refer to Figure.

-- Insert the Valve Keeper Tool Kit - Assembly Cartridge: VAS5161/8A back into the Valve Keeper Tool Kit - Guide Plate V6/V8 TFSI: VAS5161A/38 .

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-- Press the Valve Keeper Tool Kit - Pressure Fork with Lever for Assembly Cartridge : VAS5161/2 down and pull the knurled bolt -arrow- up while turning left and right. This inserts the valve retainers.

-- Release the Pressure Fork with Lever for Assembly Cartridge: VAS5161/2 with the knurled thumb bolt still pulled.

-- Repeat the procedure on each valve.

Assembly

The assembly is done in reverse sequence while observing the following:

-- Make sure all the roller rocker levers lie correctly on the ends of the valve stems and are clipped onto the respective hydraulic lifters.

-- Install the camshaft housing. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .

-- Install the spark plugs. Refer to OVERVIEW - IGNITION SYSTEM .

-- Install the engine with the transmission and subframe with the lock carrier removed. Refer to Engine, Removing and Installing .