11 12 670 Cleaning intake port with walnut shell granulate (N14)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

IMPORTANT: The intake valves of the corresponding cylinder must be closed when cleaning the intake ports.

Necessary preliminary tasks:

IMPORTANT: Determine the top dead center via the spark plug bore hole using the special tool 2 302 630.

Crank engine at central bolt.

Fig 1: Identifying OT Finder And Piston

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Prepare peener (81 29 2 208 034) with walnut shell granulate.

Fig 2: Cleaning Intake Port With Walnut Shell Granulate (1 Of 4)

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Position extraction adapter (81 29 208 038) over intake port of first cylinder.

Fig 3: Cleaning Intake Port With Walnut Shell Granulate (2 Of 4)

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Hole for probe (see arrow in illustration).

Fig 4: Cleaning Intake Port With Walnut Shell Granulate (3 Of 4)

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Insert suitable probe (3) in extraction adapter (81 29 2 208 038).

Connect compressed air connection.

Valve (1) - compressed air.

Switch on vacuum cleaner.

Valve (2) - walnut shell granulate.

Procedure:

Cleaning time approx. 30 seconds.

The cleaning result is improved by moving the probe (3) in a circular pattern.

Operate valve (1) for an additional 10 to 15 seconds to assist cleaning.

Fig 5: Cleaning Intake Port With Walnut Shell Granulate (4 Of 4)

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NOTE: Check that no walnut shell granulate remains in the intake ports.

Assemble engine.