11 61 050 Removing and installing intake air manifold (M54)

Instructions for disconnecting and connecting battery. Refer to 12 00... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .

Disconnect negative battery lead.

Remove engine cover.

CAUTION: Do not mix up oxygen monitor sensors for cylinders 1 to 3 and 4 to 6 at plug connection to wiring harness. Mark plug connections.

Unclip plug connections (1) from holders.

Fig 1: Unclipping Plug Connections From Holders

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Detach battery positive lead from intake air manifold.

Detach retainer (2) from battery positive lead.

Press lock and detach vent hose from cylinder head cover.

Fig 2: Detaching Vent Hose From Cylinder Head Cover

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Pull off retainer (1).

Fig 3: Disconnecting Plug Connection For Intake Air Temperature Sensor

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Disconnect plug connection (2) for intake air temperature sensor.

Detach terminal strip (3) from fuel injectors and place to one side.

Disconnect plug connection (1) on tank venting valve.

Fig 4: Disconnecting Plug Connection On Tank Venting Valve

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Remove tank venting valve from retainer (2) on manifold.

NOTE: For a better overview, this work step is shown on an engine that has been removed.

CAUTION: Catch and dispose of fuel as it escapes.

Instructions for removing and installing fuel hoses. Refer to 13 53 540 REPLACING, SEALING FUEL HOSES .

Unclip fuel line (1) from holder (2).

Fig 5: Unclipping Fuel Line From Holder

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Unlock fuel line (1).

Loosen guide tube for dipstick.

Press lock and detach return line from guide tube for oil dipstick.

Remove throttle assembly. Refer to 13 54 030 REMOVING AND INSTALLING/SEALING THROTTLE ASSEMBLY (M54) .

Disconnect plug connections and lay cable duct to one side.

Unclip plug connection (1) for knock sensors from holder. Release nut (2) on manifold support.

Fig 6: Unclipping Plug Connection For Knock Sensors

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Release nuts on manifold.

Fig 7: Removing Intake Air Manifold

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NOTE: Engines with air injection:

Detach vacuum line on reverse side of intake air manifold.

Remove intake air manifold.

Installation:

Check gaskets on all cylinders and replace if necessary.

Fig 8: Checking Gaskets

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Installation:

Check rubber dampers and if necessary replace together with manifold support.

Fig 9: Checking Rubber Dampers

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