Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ The description
- Engines
   Basic elements
   Greasing system
   Ventilation картера
   Visual check of the engine
   Обкатка the new engine
   Engine service life
   Nominal and maximum frequency of rotation
   Restriction of frequency of rotation
   Measurement of pressure of compression
   The list of malfunctions
   Проворачивание the engine
   Hydraulic pushers
   Works on gear belt ГРМ
   The list of malfunctions
   Removal and installation of a head of the block of cylinders
   Removal and engine installation
+ System of release of the fulfilled gases
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
+ Injection system
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Antiblocking system of brakes
+ Wheels and tyres
+ Kuzovnaja electrosystem
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications

Engines

Car Audi 80 is actuated by engines of various designs and quantity of cylinders. The palette is stretched from 4 to 6-cylinder motors. It is even more quantity впрысковых systems. To the petrol engines described in this management it is necessary to add two more essentially various diesel engines. So in variety of a lack is not present, as the following table proves.

Various degrees of capacity:

Engine marks	ABT	ABK	NG	ABC	AAH
Quantity of cylinders	4	4	5	6	6
Capacity, kw (h.p.)	66 (90)	85 (115)	98 (133)	110 (150)	128 (174)
At rpm	5400	5400	5500	5750	5500
Volume, sm³	1984	1984	2309	2598	2771
Gas mixture preparation	Mono-Motronic	Digifant	KE-III-Jetronic	MPFI	MPI

Signs of engines

The 4-cylinder engine in a cut


1 – a camshaft; 2 – hydraulic pushers; 3 – a tension roller; 4 – the piston; 5 – a gear belt; 6 – an intermediate shaft; 7 – a pulley on cranked to a shaft;	8 – the pump of a cooling liquid; 9 – a cover of a head of the block of cylinders; 10 – a spark plug of the fourth cylinder; 11 – the ignition distributor; 12 – a rod; 13 – the oil pump.

Initially designed for Audi 80, this motor is applied also for Audi 100 and for фольксвагеновских models Golf, Jetta, Passat. Its major constructive signs: the 4-cylinder engine with the top arrangement of a camshaft. The drive of valves is carried out by means of hydraulic тарельчатых pushers. The intermediate shaft results the oil pump and the ignition distributor. The drive of distributive and intermediate shaft is carried out by means of a gear belt.

The 5-cylinder engine in a cut


1 – the piston; 2 – the valve; 3 – hydraulic pushers; 4 – a gear pulley of a belt of a camshaft; 5 – a camshaft; 6 – a head of the block of cylinders; 7 – the block of cylinders of the engine;	8 – the oil pallet; 9 – a cranked shaft; 10 – an inlet tube of the oil pump; 11 – the oil pump; 12 – a gear pulley of a belt of a cranked shaft; 13 – a pulley клиноременной transfers with демпфером on cranked to a shaft.

The basic constructive signs of the 4-cylinder engine correspond also to the 5-cylinder engine presented for the first time in 1976 on Audi 100. It is Enough to name only two common features – this engine also is supplied by a gear belt for a drive of a camshaft and the pump of a cooling liquid, and in this engine for reduction of valves are used тарельчатые hydraulic pushers.

The design of a cranked shaft of the 5-cylinder engine is especially interesting: шатунные necks of a cranked shaft are at an angle in 72 under the relation to each other, for each cylinder on a shaft stand on two counterbalances. Further: specially organised disbalance of a flywheel and also демпфер on its forward end serve for absorption крутильных fluctuations.

The 6-cylinder engine in a cut


1 – an inlet gas pipeline; 2 – a package of coils of ignition; 3 – a gear belt; 4 – поликлиновой a belt; 5 – a pulley with демпфером on cranked to a shaft; 6 – the oil pump 7 – an inlet tube of the oil pump;	8 – a cranked shaft; 9 – a rod; 10 – the piston; 11 – hydraulic pushers; 12 – the valve; 13 – a camshaft;

Anew developed to representation of fourth generation Audi 100 in 1991 the 6-cylinder V-shaped engine represents very compact unit specially created for a longitudinal arrangement. Two camshafts of the top arrangement put in action by gear belts operate valves by means of тарельчатых pushers. In space between heads of cylinders the final gas pipeline is placed.

The 2,8-litre version is equipped by an inlet gas pipeline with changeable length of a path which changes active length of inlet channels depending on a range of frequency of rotation. Thus in all ranges of frequencies of rotation the optimum twisting moment of the engine is reached. It is necessary to mention also system of ignition without the distributor which is in more details described in the head ignition System.