Audi A4, S4

since 2000 of release

Repair and car operation

General information and security measures at carrying out body works

General information

The body is executed in the form of a bearing design. The bottom, боковины, the roof and back wings are welded among themselves.

The cowl, trunk lid, doors and forward wings are fixed on bolts and can be replaced. At installation of elements of a body it is necessary to sustain a uniform gap in the area of their interface since otherwise there is a knock of doors or in the course of movement there is an increased resistance of a wind. The gap should have identical value on perimeter of a prileganiye of elements of a body. Deviations of width of a gap no more than 1 mm are allowed.

If within carrying out body works it is necessary to carry out also any works with electric equipment, it is necessary to disconnect surely a negative cable (-) the storage battery. For this purpose it is necessary to familiarize with Section materials Replacement of the storage battery. As works with electric equipment it is necessary to consider even disconnection of an electric wire from any conclusion.

Many covers and facings have fastening by means of clips. It is necessary to replace the damaged or lost clips. Removal and installation of razzhimny and lock clips are considered in appropriate section.

Security measures at carrying out body works

At repair of a body it is necessary to apply spot welding. Only if it is impossible to bring electrodes to a place of welding, it is necessary to apply welding in the environment of inert gases.

· At carrying out welding works or any other works connected with formation of sparks, surely disconnect the storage battery (positive and negative cables) and carefully isolate both plugs (-) and (+). At works near the storage battery, it is necessary for removing.

At removal of the battery the memories given from electronic blocks, in particular, a radio receiver code are erased. Without a code the radio receiver can be included only by his manufacturer or HUNDRED. Familiarize with remarks in the Section Replacement of the storage battery.

· Models with the conditioner: It is not allowed to make welding and the soldering soft or firm solders of elements of the conditioner filled with a coolant. It belongs also to production of welding and the soldering of elements of the car if it can lead conditioner elements to heating.

· When welding the zinced sheets poisonous oxide of zinc is formed. Therefore it is necessary to watch good ventilation of a workplace.

· Increase a welding current by 10, at most 30 %.

· Apply electrodes from firm copper with high thermal firmness (above + 400°С).

· Clear electrodes more often and process them till diameter of a contact surface of 4 mm.

· Increase pressure upon an electrode.

· Increase welding time. Time is chosen truly if welding points are put without splashes.

· It is not necessary to open a contour of cooling of the conditioner since the coolant at hit on skin can cause frostbite.

· At casual hit of a coolant on skin it is necessary to wash out the struck site cold water within not less than 15 minutes. The coolant evaporates at external temperature. The coolant has no color and a smell, and also it is heavier some air. As existence of a coolant is not felt, around the bottom of the car and in a viewing hole there is a danger of suffocation.

Drying of a paint and varnish covering: At carrying out painting works in the course of repair drying in furnaces should not be made at temperature from above + 70°С. Otherwise electronic devices of the car can be damaged. Besides, thus in the conditioner pressure that will lead to system destruction can raise.

Removal of a polyvinylchloride sheeting of the bottom of the car: For protection against corrosion the polyvinylchloride sheeting is put on the bottom of the car and wheel arches. The sheeting is removed a rotating steel brush or hot air in temperature to + 180°С by means of a shpatel. Owing to covering heating from PHV to temperature over 180 ° With there is a chemical reaction and the hydrochloric acid promoting active corrosion, besides, is formed unhealthy pairs are formed.