13 54 030 Removing and installing/replacing throttle body (S62)

WARNING: This page is about a different car, the 2003 BMW Z8, 2002 BMW Z8, 2001 BMW Z8, and 2000 BMW Z8. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Interrogate fault memory of DME control unit. Switch off ignition. Remove manifold for intake air. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (S62) .
Instructions apply to removing and installing both throttle body assemblies on left and right. The illustrations show the left throttle body assembly being removed.

Disconnect plug connections (1).

Unclip cables (2) from cable guides.

Fig 1: Disconnecting Plug Connections

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Disconnect plug connections (1) on left knock sensor pair.

Fig 2: Disconnecting Plug Connections On Left Knock Sensor Pair

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Disconnect plug connection (1) on throttle actuator.

Fig 3: Disconnecting Plug Connection On Throttle Actuator

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Unhook cable duct (2) from mounts and raise approx. 2 cm.

Installation:

Check seating of rubber grommet on ignition coil cable.

Unclip cable strip (3) from injector valves, push upwards and tie back with cable ties (e.g. to engine hood).

Disconnect plug connection (1) on throttle potentiometer.

Fig 4: Disconnecting Plug Connection On Throttle Potentiometer

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Unfasten hose clip (1) and remove hose.

Pull off vacuum hose (2).

Fig 5: Pulling Off Vacuum Hose

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Unhook pull rods (1) at ball heads on servomotor side. Release screws (2).

Fig 6: Unhooking Pull Rods

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Remove injection pipe (3) together with injector valves towards top.

Installation:

Check O-rings on fuel injectors, replace if necessary. Coat O-rings with anti-friction rubber coating (e.g. petroleum jelly).

Remove and install sealing flange for intake air manifold, refer to 11 61 056 REPLACING SEALING FLANGE FOR LEFT OR RIGHT INTAKE AIR MANIFOLD (S62) .

Installation:

Adjust throttle basic setting, refer to 13 54 010 PERFORMING THROTTLE BASIC SETTING (S62) .

Unfasten hose clip (1).

Fig 7: Detaching Hose From T-Piece

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Detach hose (2) from T-piece (3).

NOTE: When removing the right throttle body assembly, it is essential to detach two further hoses from the T-piece.

NOTE: If necessary, pull on pull rod (1) to gain better access to nuts.

Fig 8: Locating Pull Rod

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To release and tighten nuts: Use an articulated socket wrench (11 A/F).

Release nuts on flanges at bottom (8 x in all). Lift off throttle body completely.

Fig 9: Lifting Off Throttle Body

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Tightening Torque, 13 54 1AZ. Refer to FUEL SYSTEM - TIGHTENING TORQUES .

Installation:

Replace O-rings (1). Coat O-rings with anti-friction rubber coating (e.g. petroleum jelly).

Fig 10: Replacing O-Rings

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Clean sealing surfaces on cylinder head.

Pull throttle body apart. Check throttles for freedom of movement and if necessary replace throttle body.

Fig 11: Pulling Throttle Body Apart

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Installation:

Replace O-rings (1) on connecting tubes and T-piece. Coat O-rings with anti-friction rubber coating (e.g. petroleum jelly).

Fig 12: Replacing O-Rings On Connecting Tubes And T-Piece

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Installation:

Clean sealing surfaces (1) of throttle body.

Fig 13: Cleaning Sealing Surfaces Of Throttle Body

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Installation:

Push spring bolt (1) back a little.

Fig 14: Inserting Throttle Lever

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Insert throttle lever (3) between adjusting screw (2) and spring bolt (1).