Clean intake ports

CAUTION: Swirling dirt particles caused by compressed air.
Injury hazard!

Collect dirt particles, e.g. when blowing out, use cloth to do so.
Wear safety goggles.

NOTE: RISK OF DAMAGE
Engine damage due to walnut shell granules in the combustion chamber.
If walnut shell granules penetrate the combustion chamber while cleaning the intake ports, engine damage may occur.

Always clean the intake port with valves of the relevant cylinder closed.
Set the piston of the relevant cylinder to the TDC.
If walnut shell granules have entered the combustion chamber: Do not turn or start the engine hand force. Disassemble the cylinder head and clean all components.

Ready the special tool 2 208 034 , the walnut shell granules and a standard vacuum cleaner.

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Have the special tool 2 356 969 ready.

NOTE: TECHNICAL INFORMATION
The front area of the beam probe is marked with two notches. These may additionally be highlighted in color.
During the blasting process, only pull the beam probe out of the jet vacuum adapter until the mark becomes visible.

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Observe the mark (1).
Open the blasting device (1).
Pour in the walnut shell granules (2).

TECHNICAL DATA SPECIFICATIONS

Walnut shell granules
Quantity for each blasting process	2 l

Close the blasting device (1).

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Close the valve (1) on the blasting device (2).
Connect compressed air (3).

TECHNICAL DATA SPECIFICATIONS

Cleaning the intake ports
Operating pressure	6 bar... 8 bar

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Attach the beam probe (2) to the blasting device (1).

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Connect the vacuum cleaner (1) to the special tool 2 410 274.

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Prepare 3 standard feeler gauges (1) with a thickness of 0.05 mm .
Cut the 3 feeler gauges (1) to a length of 25 mm .

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NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.

Position the prepared feeler gauges (1) on the blow-by-ports of the cylinder head (2).
Ensure that the blow-by ports on the cylinder head (2) are closed by the feeler gauges (1).

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NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.

Insert and position the cylinder head covers (1).
Ensure that the feeler gauges (arrows) are correctly positioned between the cylinder head cover (1) and the blow-by ports of the cylinder head (2).

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Position the cylinder head cover (A).
Make sure that the cylinder head cover (A) does not touch the high pressure pump bracket!
Tighten all the screws in the sequence from (1) to (21) hand-tight.

TIGHTENING TORQUE SPECIFICATIONS

Cylinder head cover to cylinder head
M6X30	Joining torque	8 Nm

Fig 1: Cylinder Head Cover Screws Tightening Sequence

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Tighten all screws in the sequence (1) to (21).

TIGHTENING TORQUE SPECIFICATIONS

Cylinder head cover to cylinder head
M6X30	tightening torque	11 Nm

Clean the marked areas (1) with a brush.

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NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.

Insert special tool 2 410 274 into the tangential port (1) of the cylinder to be cleaned.

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NOTE: TECHNICAL INFORMATION
Conduct the following operation with the assistance of a second person.

Insert special tool 2 208 033 into special tool 2 410 274 in arrow direction.

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Turn on the vacuum cleaner (1).

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NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.

Move and rotate the beam probe in arrow direction.
This removes all contamination in the tangential port.
Open the valve (1).

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Slide the locking lever (1) forward in the arrow direction.
Actuate the valve (2) to release the compressed air.
Actuate valves (1) and (2) to release the walnut shell granules and the compressed air.
Clean the swirl port.

TECHNICAL DATA SPECIFICATIONS

Cleaning the intake ports
Blast duration with walnut shell granules	Approx. 20 s
Blast duration with pure compressed air for the complete blowing out of walnut shell granules	Approx. 10 s

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Close the valve at the beam probe.

» Check the pressure drop at the pressure tester.

Repeat the following work steps consecutively on all other cylinders:
- Turn the piston for the cylinder to be cleaned to the top dead center
- Clean intake ports
Tighten all the screws on the cylinder head cover (A) in the sequence (21) to (1).

Fig 2: Cylinder Head Cover Screws Tightening Sequence

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NOTE: Schematic diagram is for example purposes. Some parts may differ in certain details.

Feed out and remove the feeler gauges (1) on the blow-by-ports of the cylinder head (2).

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Clean the blow-by channels (2) with an air gun (1).

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Make sure that the blow-by ports (1) are free of walnut shell granules.

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Make sure that the inlet ports (1) are free of walnut shell granules.

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Follow-up work

Refer to INSTALLING THE INTAKE PLENUM .
Refer to INSTALLING THE TANK VENT VALVE .
Refer to INSTALLING CONTROL UNIT BRACKET .
Refer to INSTALLING THE INTEGRATED POWER SUPPLY MODULE (PDM) .
Refer to INSTALLING THE DME CONTROL UNIT .
Refer to INSTALLING CYLINDER HEAD COVER .
Refer to INSTALLING BOTH ACTUATORS .
Refer to PREPARING THE INJECTORS FOR INSTALLATION .
Refer to INSTALLING THE HIGH-PRESSURE RAIL WITH INJECTORS OF THE CYLINDERS 4 TO 6 .
Refer to INSTALLING THE HIGH-PRESSURE RAIL WITH INJECTORS OF THE CYLINDERS 1 TO 3 .
Refer to INSTALLING HIGH PRESSURE PUMP .
Refer to INSTALLING FUEL DELIVERY LINE .
Refer to INSTALLING THE HIGH-PRESSURE LINE BETWEEN THE HIGH-PRESSURE PUMP AND THE HIGH-PRESSURE RAIL .
Refer to INSTALLING ALL IGNITION COILS .
Refer to INSTALLING ACOUSTIC COVER AT REAR .
Refer to INSTALLING THE CENTER COWL UPPER PART .
Refer to INSTALLING TENSION STRUT ON SHOCK TOWER .
Refer to ATTACHING WINDSHIELD PANEL COVER .
Refer to INSTALLING LEFT AND RIGHT WIPER ARM .
Refer to INSTALLING THE REAR RIGHT ENGINE COMPARTMENT COVER .
Refer to INSTALLING THE COVER OF THE ENGINE COMPARTMENT ON THE REAR LEFT .
Refer to INSTALLING THE REAR HOOD SEAL .
Refer to INSTALLING FAN COWL .
Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
Refer to INSTALLING UPPER CROSS CONNECTION .
Refer to INSTALLING THE RESONATOR WITH THE TOP CLEAN AIR PIPE .
Refer to INSTALLING THE INTAKE FILTER HOUSING (TENSION STRUT REMOVED ON SHOCK TOWER) .
Refer to INSTALLING BOTH FRONT-END STRUTS .
Refer to INSTALLING THE CENTER ENGINE COMPARTMENT COVER .
Refer to FILLING THE LOW-TEMPERATURE COOLING SYSTEM WITH THE VACUUM FILLING EQUIPMENT .
Refer to CONNECTING ALL BATTERY GROUND LEADS .
Refer to CARRYING OUT VALVETRONIC LIFT ADAPTATION .
Refer to VENTING THE LOW-TEMPERATURE COOLING SYSTEM .
Refer to INSTALLING THE FRONT BOTTOM LEFT AND RIGHT COVER .
Refer to INSTALLING FRONT UNDERBODY PROTECTION .
Refer to INSTALLING THE UNDERBODY PROTECTION OF THE STEERING GEAR OR THE FRONT THRUST FIELD .
Refer to INSTALLING ACOUSTIC COVER .
Refer to TAKING HOOD OUT OF THE SERVICE POSITION .