Audi A3

since 1997 of release

Repair and car operation



Audi A3
+ Maintenance instruction
- Current leaving and service
   Schedule of routine maintenance
   General information on control
   Check of levels of liquids, control of leaks
   Check of a condition of tires and pressure in them
   Replacement of impellent oil and oil filter
   Check of a gear belt of a drive of GRM on existence of damages, wear measurement
   Check of brake system
   Check of fuel system
   Rotation and replacement of wheels. Antisliding chains
   Check of a condition and replacement of hoses of an impellent compartment, localization of leaks
   Check of functioning of system of cooling
   Check of a condition of system of production of the fulfilled gases
   Visual check of tightness of a box of gear shifting
   Check of a condition of components of a suspension bracket and steering
   Check of a condition of protective covers of power shafts
   Greasing of clamps of doors and lock cylinder
   Condition check, adjustment and replacement of brushes of screen wipers
   Visual control of a seat belt and safety cushion block
   Check of a condition of the battery, care of it and charging
   Check of level of the RKPP transmission oil
   Replacement of the filter of air of salon
   Replacement of a filtering element of the air filter
   Replacement of brake liquid
   Check and replacement of spark plugs
   Replacement of the fuel filter of the diesel engine
   Check of level of liquid of system of hydrostrengthening of a wheel
   Check of level of liquid of the main transfer of automatic transmission
   Oil replacement in coupling of Haldex of models with a full drive
   Check of a condition of driving ridge belts
   Check of level of the AT transmission liquid
+ Engine
+ Systems of cooling, heating
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
+ Manual box of gear shifting
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Elektroskhema







Check of functioning of system of cooling

GENERAL INFORMATION

Hoses, also as well as driving belts, have property to fail at the most inappropriate moment – in order to avoid the troubles connected with a rupture of hoses of a radiator or a heater, attentively examine them, as is shown in drawing

 

Check of functioning of system of cooling and frost resistance of cooling liquid

PERFORMANCE ORDER
1. Many serious violations in operation of the engine are connected with malfunctions of system of cooling. If the car is equipped with automatic transmission, its functioning and service life also are directly connected with work of system of cooling.
2. Check of system of cooling should be made at the cold engine therefore it is better to be engaged in it before the first trip for the present day or not earlier than in three hours after engine switching off.
3. Slowly, being careful in case the engine yet absolutely cooled down, uncover a radiator. Carefully wash out it from within and outside pure water. Also wash out a jellied mouth of a radiator. Existence of traces of corrosion in a jellied mouth means that it is necessary to replace a cooler (address to subsection Replacement of cooling liquid). The cooler in a radiator should be rather pure and transparent. If it has brownish color, drain system and fill in in it a new cooler.
4. Carefully check radiator hoses, and also hoses of a heater which have smaller diameter. Check hoses of system of cooling on all length, making replacement of any burst, blown-up or worn-out hose. Cracks are easier for finding if to compress a hose a hand. Pay special attention to the collars holding hoses on components of system of cooling. These collars can cut or pierce hoses that will lead to leakage of a cooler.
5. Make sure of reliability of fastening of all shlangovy connections. Leakages of a cooler are usually shown in the form of white or rusty color of deposits in the field of sealing violation. If on your car collars of wire type are used, it is possible, there is a sense to replace them with collars of screw type.
6. By means of the compressed air or a soft brush clear a forward part of a radiator (and also the condenser of the conditioner of air where it is available). Remove all insects, leaves and the other extraneous subjects which have got on edges of a radiator. Be very careful not to injure an edge and not to cut about them fingers.
7. If cooler level constantly falls, and you did not find any leaks, it is necessary to make check by pressure of a cover of a radiator and all cooling system.
Check of frost resistance of cooling liquid

ATTENTION

Do not allow antifreeze hit on your skin and the painted surfaces of the car. At hit immediately wash away a plentiful quantity of water. Antifreeze is extremely toxic and mortally dangerous at hit in an organism. Do not leave antifreeze in the open container or spilled on a floor; its sweetish smell can easily involve in itself children or pets. Consult about local rules of utilization of the fulfilled antifreeze. In many areas there are special centers for its acceptance.


Before the beginning of a winter season it is necessary to check surely concentration of antifreeze in cooling liquid, especially if in system pure water was in use filled in.
The demanded special tool:

– Frost resistance measuring instrument. There is also optical device for check of level of HAZET No. 4810.

Demanded operational materials and spare parts:

— Antifreeze with means of protection from «G12» corrosion (red color, designation «G 012 A8D agrees TLAUDI 774 D») and pure, not containing limes water.
Check
8. Slightly warm up the engine so that the top hose of a radiator heated up. At measurement of concentration of antifreeze the temperature of liquid should make near +20°С.
The remark on security measures

At the hot engine the stopper of a broad tank should be opened carefully. There is a danger of a burn! It is necessary to put a rag on a stopper. A stopper open only at liquid temperature no more + 90°С.
9. Carefully unscrew a stopper of a broad tank.
10. Gather liquid by means of an areometer pear.
11. In our widths the concentration of antifreeze providing protection of system to temperature – 25°С is sufficient, at especially frigid climate to – 35°С.
Antifreeze addition
In need of protection of the engine to temperature – 25°С concentration of antifreeze in cooling liquid should make 40 %. In need of protection to temperature – 35°С concentration of antifreeze should make 50 %.

ATTENTION

If higher extent of protection against freezing is required, it is possible to raise level of concentration of antifreeze to 60 %. Such concentration will provide protection to – 40°С. If concentration raises to higher level, extent of protection of the engine starts to go down and, besides, heat-removing properties of a cooler worsen.


At cars to 8LVA006233 chassis number (the date of issue approximately till the end of 1996) is serially applied antifreeze of cooling G11-ABC liquid or any other antifreeze with a mark «according to TL–VW 774 C». He can be learned on green color.
Since number of the 8LVA006234 chassis AUDI G12 antifreeze is serially applied. G12 can be applied to filling of system or any other antifreeze with a mark «according to TL–VW 774 D». G12 antifreeze has red color.

ATTENTION

G11 and G12 is not allowed to be mixed. It can lead to heavy damages of the engine. It is necessary to replace cooling liquid of brown color (G11 and G12 mix) immediately.

The engines intended for use of G11, can be transferred to the modified G12 antifreeze.


12. Close a stopper on a radiator and after a trial trip again check concentration of antifreeze, thus address to Specifications.