Removal and installation engine covers (Audi A4 B6)

The Audi A4 engine is at least partially covered by plastic parts. The upper covers primarily serve an optical function, but they also protect the engine and serve as sound insulation. These covers have to be removed during many works on the engine and in the engine compartment.

In the case of the upper covers, this is done relatively easily. The screws and clamps loosen quite quickly. It is more difficult to dismantle the lower engine cover - the main sound insulation. The cover is designed approximately the same in all engines, but in this case you cannot do without installing the car on trestles. If you intend, for example, to change the coolant or oil, then you cannot do without removing the cover from the lower side of the engine.

1. The top cover of the ALZ 1.6L engine consists of two parts (1 and 2). These parts are held in place by spring clips and can be removed (carefully!) remove upwards.



2. To remove the bottom cover (soundproofing) place the vehicle on jack stands, taking appropriate precautions. Loosen the locking screws at the points indicated by the arrows.





3. If you need to remove the front sound insulation holder (arrow), loosen three more screws.



4. Installation is carried out in the reverse order. Place and fasten the upper covers. Screw on the lower engine cover and lower the car.

ALT and AVJ engines

1. The top cover of the ALT 2.0L and AVJ 1.8L engines is screwed on. To remove it, you need to loosen three bolts (or nuts).

ASN engines

1. The upper casing of the six-cylinder V-engine ASN 3.0 l consists of three parts. During many works it is necessary to remove the cover 1 on the right side of the engine compartment (clamps).



2. The front engine cover is removed as follows (arrows in the picture).

Engines ALT, AVJ and ASN

4. When removing the bottom cover (sound insulation; put the car on the trestle!) please note whether the vehicle is equipped with an independent heater. If such a heater is installed, first remove the heater pipe screws (arrows) on the soundproof cover.



5. After this, unscrew the locking screws and remove the bottom cover.



6. Installation is carried out in the reverse order. Put the upper covers on and fasten or screw them. Screw the lower engine cover on (if necessary also a soundproofing cover holder) and lower the car.

[The original source of the article can be found on the website audimanual.ru]