Frost resistance test (density) coolant in the expansion tank
The brake fluid reservoir is located on the left in the engine compartment. The tank cap has a vent hole that must not be blocked. The brake fluid level must remain above the mark "MIN" on a translucent tank - remove the cap and add liquid
The windshield washer reservoir is located on the right side of the engine compartment
Warning: The fluid level check procedures to be performed every 400 km or weekly are described below. A description of other fluid level checks can be found later in the Sections on specific maintenance procedures. Regardless of the scheduled inspection intervals, do not allow fluid to leak under the vehicle, such leaks indicate a malfunction that should be repaired immediately.
Order of execution
1. Fluids are an integral part of the lubrication, cooling, brake and windshield washer systems. Due to the gradual consumption and / or contamination of fluids during normal vehicle operation, they should be replaced periodically. Check out Section "Types and volumes of lubricants and fluids used" See the Specifications before adding fluid to any of the listed components.
Warning: Whenever checking the fluid level, the vehicle must be on a level surface.
Visual control of leaks
2. With an oily engine and high oil consumption, check for leaks. For this, the following places are checked:
- Open the filler cap and check the seal for cracks or damage.
- Crankcase ventilation: For example, a ventilation hose from the cylinder head cover to the air intake hose.
- Cylinder head cover seal.
- Cylinder head seal.
- Oil removal plug (round ring).
- Oil filter seal: sealing of the filter against the flange.
- Oil pan seal.
- Front and rear camshaft and crankshaft seals.
Since the oil spreads over a large surface of the engine in the presence of leaks, it is difficult to immediately determine the location of leaks. To detect leaks, proceed as follows:
3. Flush the engine as follows: close the generator with a plastic bag. Spray the engine with a normal cold cleaner and after a short time wash it with water at a car wash.
4. Sprinkle the connecting planes and seals on the engine with lime or talc on the outside.
5. Check oil level, top up if necessary.
6. Take a test drive. Since the oil in a hot engine reduces its viscosity and leaks out more quickly at leaks, a test drive of about 30 km on the highway should be carried out.
7. Finally, examine the engine with a lamp and locate leaks by troubleshooting.
Level check
8. The engine oil level is checked using a dipstick located on the side of the engine (refer to the illustrations of the engine compartment given in this chapter to determine its location). The dipstick goes down through the metal tube to reach the bottom of the engine sump.
9. Measuring the level of impellent oil is carried out before starting the engine or at least 15 minutes after it is turned off.
Warning: If you start measuring the engine oil level immediately after turning off the engine, some oil will remain at the top of the engine, which will significantly affect the accuracy of the dipstick readings.
10. Remove the dipstick and dry the blade with a clean cloth or paper towel. Insert the dipstick all the way back and remove it again. The height of the oiled section of the blade will match the oil level in the engine. This level should be between the two marks on the dipstick.
11. It takes one liter of oil to raise the oil level from the minimum mark on the dipstick to the maximum mark. Do not allow the level to fall below the minimum mark, as oil starvation can damage the engine. On the other hand, overfilling the engine with oil (topping up above the maximum mark) can cause clogged spark plugs, oil leaks, or seal failure.
12. To add oil, unscrew the filler cap located on the cylinder head cover. After adding oil, wait a few minutes for the oil level to stabilize, then remove the dipstick and check the level again. Add more oil if required. Close the filler cap and tighten it by hand.
13. Checking the oil level is an important preventive procedure. A persistent drop in oil level indicates either oil leaks from damaged seals or loose connections, or it is burning out (internal leaks through worn piston rings or through valve guides). In addition, you should pay attention to the condition of the oil itself. If the oil has a milky color or you can see drops of water in its composition, this indicates a possible leak in the cylinder head gasket or a crack in the cylinder head or block. In this case, the engine should be repaired immediately. Each time you check the oil level, run your thumb and forefinger over the dipstick blade before wiping. If dirt particles or metal particles are found adhering to the dipstick, the oil should be changed (refer to subsection Changing the engine oil and oil filter).
Engine cooler
Warning: Do not allow antifreeze to come into contact with your skin or painted vehicle surfaces. If this does happen, rinse off the antifreeze immediately with plenty of water. Antifreeze is extremely toxic if ingested. Never leave it unattended in an open container or spilled on the floor; children or animals may be attracted to its sweet smell and drink it. Arrange with local authorities to dispose of used antifreeze.
14. All vehicles covered in this manual are equipped with an overpressure compensation type cooling system. White plastic bottle (or coolant tank) located in the engine compartment and connected by a hose to the radiator. As the engine warms up during operation, the expanding coolant fills the reservoir. When the engine cools down, the coolant automatically returns to the cooling system, which ensures that its level is maintained at a constant value.
15. The coolant level in the tank should be checked regularly. Add 40%/60% ethylene glycol antifreeze/water mixture. Compound G12 should be used.
Please note: AUDI antifreeze and corrosion protection "G 11", used in previous models of AUDI cars, are not allowed to be used. G 11 is green. G 12 red. Do not mix G11 and G12 as this can cause severe engine damage. Brown mix (G 11 and G 12) must be replaced immediately.
Warning: Do not remove the expansion tank filler cap or radiator cap to check the coolant level before the engine is completely cool! The level in the reservoir fluctuates depending on the temperature of the engine. When the engines are cold, the coolant level should be above the mark "MIN" on the tank. As the engine warms up, the level should approach the mark "MAX". If not, let the engine cool down and then remove the tank cap.
16. Run the car and check the coolant level again. If only a small amount of coolant needs to be added to the correct level, clean water can be used for this. However, frequent additions of water will dilute the antifreeze. In order to ensure the correct ratio of antifreeze and water, always top up to the correct level with the required mixture.
17. If the coolant level drops regularly, there may be a leak in the system. Inspect the radiator, hoses, filler cap, drain plugs, and water pump. If no leaks are found, have the expansion tank cap and radiator leak tested at an AUDI workshop.
18. If you need to remove the cover, wait until the engine is completely cool, then wrap a piece of thick rag around the cover and unscrew it to the first stop. If steam or coolant starts to escape from the cover, allow the engine to cool slightly before removing the cover.
19. The condition of the cooler should also be checked. It should be relatively clean. If the fluid is brown or rusty in color, it must be drained, the system flushed and filled with new mixture. Even if the coolant looks normal, the corrosion inhibitors it contains lose their effectiveness over time, so it should be replaced at regular intervals.
20. To check the frost resistance of the coolant, you must use a hydrometer.
Brake and Clutch Fluid
Warning: Brake fluid can harm your eyes and damage the painted surfaces of your vehicle, so be very careful when handling it. Do not use brake fluid that has been exposed for a long time or is more than one year old. Brake fluid tends to absorb moisture from the air, which can lead to a dangerous loss of brake system performance. Use only the recommended type of brake fluid. Mixing different types of fluid can cause brake system failure.
21. The master cylinder of the brake system is installed in the rear left corner of the engine compartment.
22. To check the clutch fluid level, look at the translucent reservoir. The level should be near the ledge on the tank. If it is lower, remove the cap and add the recommended fluid.
23. The brake fluid level is also checked visually, according to the marks on the plastic reservoir mounted on the master cylinder. The fluid level must be between the marks "MAX" And "MIN". If the level is too low, first wipe the top of the reservoir and the lid with a clean rag to prevent dirt from entering the system after removing the lid. Top up to the correct level with the recommended fluid, but do not overfill.
24. While the reservoir cap is off, check the fluid and master cylinder reservoir for contamination. If it contains particles of rust, dirt or drops of water, the fluid from the system should be drained and filled with new.
25. After filling the reservoir to the correct level, make sure that the lid is installed evenly to avoid fluid leakage and / or dirt ingress.
26. The fluid level in the master cylinder will drop slightly as a result of worn brake pads. There is no need to add it as long as the level remains near the mark "MIN"; it will rise after changing the pads. A very low level may indicate worn brake pads. Check them for wear.
27. If the brake fluid level keeps dropping, check the entire system for leaks immediately. Inspect the brake lines, hoses and fittings, along with the calipers, wheel cylinders and master cylinder.
28. If the reservoir is empty or nearly empty when checking the fluid level, the brake or clutch system should be checked for leaks and bled.
Windshield washer fluid
29. The windshield washer fluid is located in a plastic reservoir on the right side of the engine compartment. Tank capacity on cars with headlight washers 5.5 liters.
30. In temperate climates, the system can be filled with normal water, but it is recommended to add glass cleaner with a solvent for wax preservatives to the water. The tank should be no more than two-thirds full, so that there is free space in case the water expands when it freezes. In cold climates, use a windshield washer antifreeze that lowers the fluid's freezing point, available from any auto supply store. It is usually sold in concentrated or prepared form. If you purchased concentrated antifreeze, mix it with water according to the manufacturer's instructions on the package.
Warning: Do not use antifreeze in the cooling system - it will damage the painted surfaces of the car.
Visitor comments