| 1. Many serious violations in operation of the engine are connected with malfunctions of the cooling system. If the car is equipped with automatic transmission, then its functioning and service life are also directly connected with operation of the cooling system. |
| 2. Check of the cooling system has to be made at the cold engine therefore it is better to be engaged in it before a trip, the first for the present day, or not earlier than in three hours after switching off of the engine. |
| 3. Slowly, being careful in case the engine yet not absolutely cooled down, uncover a radiator. Carefully wash out it clear water from within and outside. Also wash out a jellied mouth of a radiator. Existence of traces of corrosion in a jellied mouth means that the cooler should be replaced (address the subsection Replacement of Cooling Liquid). The cooler in a radiator has to 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 heater hoses which have smaller diameter. Check cooling system hoses on all length, making replacement of any burst, blown up or worn-out hose. It is easier to find cracks if to squeeze a hose a hand. Pay special attention to the collars holding hoses on cooling system components. These collars can cut or pierce hoses that will lead to leakage of a cooler. |
| 5. Make sure of reliability of fastening of all hose 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, then it is possible, there is a sense to replace them with collars of screw type. |
| 6. By means of compressed air or a soft brush clear a forward part of a radiator (and also the air conditioner condenser where it is available). Remove all insects, the leaves and other foreign objects which got on radiator edges. 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 hit of antifreeze on your skin and the painted surfaces of the car. At hit immediately wash away a plentiful amount of water. Antifreeze is extremely toxic and deadly at hit in an organism. Do not leave antifreeze in an open container or spilled on a floor; its sweetish smell can easily attract to itself children or pets. Consult about local rules of utilization of the fulfilled antifreeze. In many areas there are special centers for its acceptance.
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| Before a winter season it is necessary to check surely concentration of antifreeze in cooling liquid, especially if in system clear water was in use filled in. |
The required special tool:
– Frost resistance measuring instrument. There is also optical device for check of the HAZET level No. 4810.
The required operational materials and spare parts:
— Antifreeze with a security measure from corrosion of "G12" (red color, the designation "G 012 A8D according to TLAUDI 774 D") and the pure, not containing lime water. |
| Check |
| 8. Slightly warm up the engine so that the top hose of a radiator heated up. At measurement of concentration of antifreeze temperature of liquid has to make about +20 °C. |
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. Open a stopper only at a temperature of liquid no more than + 90 °C. |
| 9. Carefully turn off a stopper of a broad tank. |
| 10. Gather liquid by means of an areometer pear. |
| 11. In our latitudes the concentration of antifreeze providing protection of system up to the temperature of -25 °C at especially frigid climate to –35 °C is sufficient. |
| Antifreeze addition |
| In need of protection of the engine up to the temperature of -25 °C concentration of antifreeze in cooling liquid has to make 40%. In need of protection up to the temperature of -35 °C concentration of antifreeze has to make 50%. |
ATTENTION If higher degree of protection against freezing is required, it is possible to increase the level of concentration of antifreeze to 60%. Such concentration will provide protection to –40 °C. If concentration increases to higher level, degree of protection of the engine begins to go down and, besides, heat-removing properties of a cooler worsen.
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| At cars to number of the 8LVA006233 chassis (date of issue approximately until the end of 1996) antifreeze of G11-ABC cooling liquid or any other antifreeze with a mark "according to TL-VW 774 C" is serially applied. He can be recognized on green color. |
| Starting with number of the 8LVA006234 chassis AUDI G12 antifreeze is serially applied. G12 or any other antifreeze with a mark "according to TL–VW 774 D" can be applied to filling of system. G12 antifreeze has red color. |
ATTENTION G11 and G12 is not allowed to be mixed. It can lead to heavy damages of the engine. Cooling liquid of brown color (mix G11 and G12) should be replaced immediately.
The engines intended for use of G11 can be transferred to the modified G12 antifreeze.
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| 12. Close a stopper on a radiator and after a trial trip check concentration of antifreeze again, at the same time address Specifications. |