Bold reference numbers in this section identify parts not shown in the figures alongside the text, but can be found in the exploded view diagram.

If necessary, slacken off the clamps (3) securing the throttle body to the hoses (4) and (16) and remove the hoses.

Undo the screws (25) to remove the injectors from the throttle body, recovering the washers (24).

Fit washers (24) and tighten screws (25) to the specified torque (Sect. C 3, Engine torque settings).

If the heat shrink sleeve (6) is to be renewed, slide it over hoses (28) and (29) and seat tight against the clamp (8), as shown in the photo.

Set the hot air blower to 150 °C. While holding the pipes curved, apply heat to “shrink” the sleeve, holding the blower approxi­mately 15 mm from the sleeve. Pass the hot air blower along the sleeve several times (moving continuously from one end to the other) avoiding heating the same point for a prolonged time.

To remove it, unscrew the two screws (32) and disconnect the hoses (G) from the throttle body.

Refer to Section M 3, Stepper motor for details on its operation.

If the hoses (4) and (16) were removed, reconnect them to the throttle body with the clamps (3), positioning the hoses and clamps as shown in the figure.

The air temperature sensor (7) is installed on the vertical cylinder manifold (16); refer to Sect. M 3, Air pressure sensor for its installation.

The hose (16) which mounts the air temperature sensor (17) should be installed on the same side of the throttle body as the position sensor (2).

Take couplings (4) and (16) fully home on throttle body, ensuring the mould parting lines (M) of couplings match with the right-hand edge of throttle body sockets (H), as shown below.

Tighten the clamps to the specified torque (Sect. C 3, Frame torque settings), complying with the positioning shown in the figure and ensuring they do not pop out of their seats (L) on couplings.

Orient the throttle body (26) with the race facing the right-hand side (relative to the direction of travel) and insert it fully into the intake manifolds.

Tighten the clamps (17) to the specified torque (Sect. C 3, Frame torque settings), making sure that they do not protrude beyond the edges of the manifolds.

Install the air pressure sensor (21) to the throttle body, fit pressure sensor hoses to manifold and connect connector (D) to main wiring harness.