Audi A4, S4

Since 2000 of release

Repair and car operation

Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
+ Current leaving and service
+ The engine
+ Systems of cooling, heating and the air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
- Body
   The general data and security measures at carrying out кузовных works
   Cleaning and leaving
   Repair of insignificant damages кузовных panels
   Repair of considerable damages of a body
   + The external equipment
   + The salon equipment
+ Onboard electric equipment

The general data and security measures at carrying out кузовных works

The general data

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, cover of a luggage carrier, door 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 backlash in the area of their interface since otherwise there is a knock of doors or in the course of movement there is a raised resistance of a wind. The backlash should have identical value on perimetre прилегания body elements. Deviations of width of a backlash no more than 1 mm are supposed.

If within the limits of carrying out кузовных works it is necessary to spend also any works with an electric equipment, it is necessary to disconnect necessarily a negative cable (-) the storage battery. For this purpose it is necessary to familiarise with materials Replacement of the storage battery Has undressed. As works with an electric equipment it is necessary to consider even switching-off 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 разжимных and lock clips are considered in corresponding section.

Security measures at carrying out кузовных works

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

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

At battery removal the data from electronic blocks of memory, in particular, a radio receiver code is erased. Without a code the radio receiver can be included only its manufacturer or HUNDRED. Familiarise with remarks in Section Replacement of the storage battery.

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

At welding of the zinced sheets it is formed poisonous оксид zinc. Therefore it is necessary to watch good ventilation of a workplace.

Increase a welding current on 10, a maximum of 30 %.

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

clear electrodes Is more often and process them till diameter of a contact surface of 4 mm.

Raise 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 a skin can cause обморожение.

At casual hit of a coolant on a skin it is necessary to wash out the amazed site cold water within not less than 15 minutes the Coolant evaporates at external temperature. The coolant has no colour and a smell, and also it is heavier than air. As coolant presence 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 of painting works in the course of repair drying in furnaces should not be made at temperature from above + 70С. Electronic devices of the car Otherwise 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 leaves a rotating steel brush or hot air in temperature to + 180С with the help шпателя. Owing to heating of a covering from ПХВ to temperature from above 180 With there is a chemical reaction and the hydrochloric acid promoting to active corrosion, besides, is formed unhealthy steams are formed.