Audi 80/90/Coupe

since 1986-1991 of release

Repair and car operation

All laying and consolidations are subject to replacement. Hoses without fail fix collars.

Check cooling system by means of Snap On SVT 362 and 4467 equipment.

If in oil a significant amount of metal shaving is found, it is necessary to clean oil channels and to replace the oil filter.

It is possible to remove and establish all specified details without engine dismantle from the car.

Replacement of cooling liquid

System of cooling of Audi cars of all models are filled at manufacturer with a water and antifreeze (G 11) mix with anticorrosive additives. Such cooling mix can be used all the year round.

Antifreeze not containing phosphates increases frost resistance, prevents corrosion and scaling, and, besides, raises a boiling point. Increase of a boiling point of cooling liquid improves operational parameters at work with the maximum loading, especially in tropical conditions.

At replacement of cooling liquid in Audi cars of all models irrespective of a year of release it is necessary to fill system of cooling with antifreeze ZVW237 102 not containing phosphates.

When the engine is heated-up to normal working temperature, level of cooling liquid in a broad tank should be a little higher than maximum label. When the engine cold, level of cooling liquid in a broad tank should be between minimum and maximum labels.

It is forbidden to touch fan blades. The fan can spontaneously turn on at timer operation. In a warm motor compartment the cycle of turning on of the fan can repeatedly repeat after an engine stop.

Modern cars are equipped with system of automatic start of the fan for cooling of a gasoline pipe line and injectors after an engine stop that facilitates the subsequent start-up of the hot engine.

Principle of work of system

If the temperature in space of a motor compartment after a stop of the engine is higher 110 ° With, the thermoswitch includes a timer which in turn turns on the fan.

When the temperature becomes lower 103 ° With, the relay disconnects the fan. Such cycle can repeatedly repeat, throughout 10–12 minutes.

System details

Thermoswitch

It is mounted on an arm which fastens to a block head between the 1st and 2nd cylinders (from an injector).

Timer

After operation of a thermoswitch, a timer turns on the fan for the first speed of rotation on 10-12 mines after an engine stop.

Fan thermoswitch – operation thresholds

Switch	Inclusion / switching off temperature
	incl.	off.
Three-chambered, provides connection with a positive pole of the battery, inclusion of the first speed of rotation	92-97 ° With	84-91 ° With
Second speed of rotation of the fan	99-105 ° With	91-98 ° With

Search of malfunctions

Timer

It is mounted on an auxiliary guard under the dashboard on the left side.

Turn the ignition key in the situation ON and OFF.

Connect to mass of the car a thermoswitch wire.

The fan should turn on on the first speed of rotation.

Test should be executed within 10–12 minutes after an engine stop as the timer works during this period.

The situation ON – closes contact on weight when the temperature in a motor compartment is higher 110 ° than Page.

The situation OFF – contacts are opened, when the temperature in a motor compartment is lower 103 ° than Page.

Electroconducting

By search of malfunctions of an electric chain look subsection 14.3.2.

Tarirovka of the areometer for antifreeze

For ensuring accuracy of measurements, it is necessary to check an areometer tarirovka periodically.

In a small vessel mix antifreeze and water in the ratio 1:1.

The indication of the areometer should be-35 ° S.Esli the indication differs, put a label corresponding to-35 ° by Page.

Fan thermoswitch – operation thresholds

Switch	Inclusion / switching off temperature
	incl.	off.
Three-chambered, provides connection with a positive pole of the battery, inclusion of the first speed of rotation	92-97 ° With	84-91 ° With
Second speed of rotation of the fan	99-105 ° With	91-98 ° With

Tarirovka of the areometer for antifreeze

For ensuring accuracy of measurements it is necessary to check an areometer tarirovka periodically.

in a small vessel mix antifreeze and water in the ratio 1:1

the indication of the areometer should be-35 °

if the indication differs, put a label corresponding-35 °

Replacement of cooling liquid

Antifreeze not containing phosphates increases frost resistance, prevents corrosion and scaling, and, besides, raises a boiling point. Increase of a boiling point of cooling liquid improves operational parameters at work with the maximum loading, especially in tropical conditions.

At replacement of cooling liquid in Audi cars of all models, irrespective of a year of release, it is necessary to fill system of cooling with the antifreeze ZVW237 102 which is not containing phosphates.

Recommended mixes

Filling

PERFORMANCE ORDER

1) establish on a place and fix hoses 2) unscrew the screw of the ventilating valve (it is specified by an arrow) 3) fill a broad tank of cooling liquid to maximum label 4) when cooling liquid will start to be poured, wrap the screw of the ventilating valve 5) close a tank a stopper 6) start the engine and warm up it before the first operation of the fan

Components of system of cooling (Compartment model)

1. Consolidation 2. Radiator guard, top section 3. 10 N of m. 4. Rezinometallichesky plug, 10 N of m. 5. Fan 6. Radiator guard, right section 7. 20 N of m. 8. Radiator 9. Sealing washer 10. Thermoswitch, 25 N of m.

11. Stopper of a broad tank check: by means of the VAG 1274 and VAG 1274/1A adaptation control pressure from 1,2 to 1,5 atm 12. Broad tank 13. Radiator casing 14. To a head of the block of cylinders 15. To the thermostat 16. To an additional radiator

Check leaks in cooling system by means of the VAG 1274 and VAG 1274/1A adaptation.

Replace laying and consolidations. All hoses fix collars with fixing by the screw.

Antifreeze not containing phosphates increases frost resistance, prevents corrosion and scaling, and, besides, raises a boiling point. Increase of a boiling point of cooling liquid improves operational indicators of the engine at work with the maximum loading, especially in tropical conditions.

At replacement of cooling liquid, or at level restoration to fill system of cooling follows antifreeze ZVW237 102 not containing phosphates. It belongs to all models of Audi cars, irrespective of a year of release.

Recommended mixes

Filling

PERFORMANCE ORDER

1) open the ventilating valve (it is specified by an arrow) 2) fill in cooling liquid to maximum label on a broad tank 3) watch intake of liquid via the ventilating valve as soon as liquid will start to be poured, close the valve 4) close a tank a stopper 5) start the engine and warm up it before the first operation of the fan 6) check level of cooling liquid, if necessary воcстановите

When the engine is heated-up to normal working temperature, level of cooling liquid in a broad tank should be a little higher than maximum label. When the engine cold, level of cooling liquid in a broad tank should be between minimum and maximum labels.