The following types of batteries are installed on AUDI 80 vehicles:
- 12 V/40 Ah, type 54 045 (all four-cylinder engines);
- 12 V/63 Ah, type 56318 (five- and six-cylinder engines).
Rechargeable batteries tolerate low temperatures relatively well if they are charged. A discharged battery freezes and may burst. For this reason, it is recommended to check the battery charge when the season changes.
The electrolyte with which the battery is filled is sulfuric acid diluted with distilled water. Part of the water may evaporate or decompose during battery charging, releasing hydrogen.
AUDI 80 vehicles are equipped with maintenance-free batteries. The volume of electrolyte filled in at the factory under normal operating conditions is enough for the entire period of operation and it is not necessary to add distilled water. Liquid losses are possible only when the vehicle is operated in regions with a hot climate, the generator voltage regulator fails, the battery self-discharges, or the battery is discharged due to the on-board network consumer left on, for example, parking lights.
The electrolyte level in the battery must not be lower than the lower mark on the case. It should cover the top of the plates. In the event of a drop in the electrolyte level, unscrew the plugs of the cells.
If the battery has a normal charge, then add distilled water to the cells flush with the lower mark on the case, but no more than 15 mm above the top of the plates in the cells.
If the battery is very discharged, then add distilled water just enough to cover the top of the plates in the cells. Subsequent charging will increase the electrolyte level. After charging the battery, add distilled water to bring the electrolyte level to the top mark on the battery case.
Note: Do not overfill the battery with distilled water. Such a battery will «boil» and excess electrolyte will flow out from under the plugs.
Subject to all requirements for the operation of the battery, its service life is an average of 3-4 years.
Battery - removal and installation
1. Make sure you know the security code entered into the radio so you can re-enter it later.
2. Remove the battery cover. On vehicles with four- and five-cylinder engines, the cover is removed after opening the latches on the right and left (see illustration).
3. Six-cylinder engines. Disconnect both plastic clips securing the cover: one from the bottom of the engine and one near the wing.
Attention! Be sure to first disconnect the wire terminal from the battery «masses» (-) and only then the wire terminal (+).
4. Loosen the terminal nut (+) and disconnect the terminal (see illustration).
5. Turn out a bolt of the level holding the accumulator in a tray, and remove a level together with a bolt.
6. Disconnect the plastic battery ventilation hose
7. Remove the battery.
When installing, do not forget to connect the battery ventilation hose. The battery terminals cannot be reversed because the positive terminal is larger than the negative terminal.
8. After connecting the battery, enter the security code into the radio.
Battery - care of poles and terminals
8. Remove crystalline deposits on the terminals with warm water and soda or with a «Neutralon», produced by the company «Varta».
9. Lubricate the poles and battery terminals with protective grease from Bosch «Ft 40v 1». At the same time, do not allow grease to get on the outer surfaces of the poles in contact with the terminals.
Accordingly, the inner surfaces of the terminals in contact with the poles must also be free from grease.
Battery - checking and charging
If, despite a sufficient level of electrolyte in the battery cells, no power is supplied from it, then check its charging. This can be found by determining the specific gravity of the electrolyte. This requires a hydrometer, which can usually be used at a gas station.
Examination
10. Remove the cell plugs.
11. Take the electrolyte with a hydrometer. The amount of electrolyte collected in the hydrometer should ensure the free movement of the float.
12. Read the reading. If the hydrometer reading is 1.28 kg / l, then the battery has a good charge. A reading of 1.20 kg/l indicates a half charge and 1.12 kg/l indicates the battery is discharged.
Charger
13. Disconnect both terminals from the battery poles. The battery can be charged without removing it from the vehicle. Battery cell plugs can not be unscrewed. The gas generated during charging will exit through the vents in the plugs.
The charging current should not exceed 10% of the battery capacity. So, for a 40 A / h battery, the charging current should be 4 A. The battery is considered charged if the electrolyte density does not increase in the last two hours.
When the battery is charged, distilled water decomposes to form bubbles of hydrogen and oxygen, which form detonating gas. For this reason, make sure that the room is adequately ventilated. This is especially important if the battery is being charged with high current.
14. Do not smoke near the battery when it is being charged, and do not use naked flames.
Starting the engine with a discharged battery
It is generally not recommended to start the engine of vehicles equipped with a catalyst with a jerk if the cause of this is a discharged battery. If the reason for the forced start of the engine is a discharged battery, then kick starting is not particularly dangerous. Another thing is if the ignition system is faulty. In this case, unburned fuel that enters the catalyst may ignite and cause destruction of the catalyst.
15. Turn on the ignition.
16. Engage 1st gear. Using a higher gear is not recommended because the alternator will not provide the necessary amperage when rotating at low speeds.
17. Squeeze out the clutch and ask to push the car. Two people can handle it.
18. Release the clutch as soon as the speed of the pushed vehicle is sufficient.
19. Depress the clutch and press the accelerator as soon as the engine starts.
Forced start with another vehicle's battery
20. Park the car with a good and charged battery as close as possible to the starter to ensure that the wires are routed.
21. Make sure that all electrical consumers are turned off on a car with a discharged battery.
22. Connect the positive poles of both batteries.
23. Connect the auxiliary wire first to the negative terminal of the auxiliary battery and then to «mass» (-), for example, to the cylinder block of the engine being started.
24. Start the support vehicle's engine and run it at high speed to give the alternator a good charge.
25. Start the car engine with the discharged accumulator. If it does not start immediately, then pause so as not to overheat the starter. Leave the auxiliary vehicle engine to idle. This will recharge the depleted battery.
When removing auxiliary wires, first disconnect the terminal from the negative battery terminal of the auxiliary vehicle.
Starting the engine from a tow
Attention! When the engine is not running, the power steering and brake actuators do not work.
26. Turn on the ignition.
27. Engage 2nd gear and depress the clutch. Once both vehicles have reached a speed of approximately 15 km/h, slowly release the clutch and place your right hand on the parking brake lever. As soon as the engine starts, depress the clutch and press the accelerator.
28. Apply the parking brake. Do this smoothly to avoid the forced stop of the towing vehicle.
29. Signal the towing vehicle.
30. Set the gearshift lever to neutral and release the gas pedal.
31. Apply the parking brake together with the towing vehicle.
Attention: When forced starting by towing a car with a diesel engine due to solidification of the fuel, remember that such a car cannot be towed for long distances, because. HPFP is not provided with lubrication.
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