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Throttle body

Throttle body

Warning

Be careful if the car is warm. The coolant is hot and there is a risk of burns from the intake manifold.


To remove


1. Turn the ignition to the OFF position.

2. Remove the upper engine cover.


3. Undo the coolant expansion tank cap to release any pressure and then retighten it.

4. Remove the cover on the throttle body pedal arm.

5. Pinch together the 2 coolant hoses to the throttle body.


6. Undo the charge air bypass valve hose and the two preheating hoses.


7. Detach the lower vacuum hose.

8. Undo the turbocharger delivery pipe retaining screw in the cylinder head.


9. Undo the hose clip and carefully tilt up the turbocharger delivery pipe.

10. Detach the accelerator pedal wire from the throttle body pedal arm.


11. Lift off the rubber seal and unplug the limp-home solenoid connector.

12. Unplug the throttle body 10-pin connector.

13. Undo the 3 throttle body retaining screws.

14. Lift up the throttle body and detach the hose under the limp-home solenoid.



To fit


1. Position the throttle body and screw it on with the 3 retaining screws. Fit a new seal if necessary and lubricate it with a thin coat of vaseline (part no. 30 20 271).


2. Fit the hose under the limp home solenoid and fit the clip.

3. Tighten the 3 throttle body retaining screws.

Tightening torque up to and including engine no. 7011078: 10 Nm (7 lbf ft)

Tightening torque from and including engine no. 7011079: 8 Nm (6 lbf ft)


4. Spray the throttle body 10-pin connector with Kontakt 61 (part no. 30 04 520) and plug it in.

5. Spray the limp-home solenoid connector with Kontakt 61 (part no. 30 04 520). Plug in the connector and fit the rubber seal.

6. Fasten the accelerator pedal wire to the throttle body pedal arm.

7. Fit the lower vacuum hose.


8. Fit the charge air bypass valve hose and the two preheating hoses.

9. Remove the clips on the two coolant hoses to the throttle body.


10. Fit the cover on the throttle body pedal arm.


11. Start the engine and make sure all the connections are tight. Top up with coolant as necessary.

12. Refit the engine cover.

Tightening torque 10 Nm (7.4 lbf ft)


Important

The limp-home solenoid will be activated when the ignition is turned on. The limp-home mechanism must therefore be reset after turning on the ignition.


See Resetting triggered limp-home solenoid