Caution | When doing any repair work, especially in the engine compartment, pay attention to the following due to the cramped conditions: |
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| Route all the various lines (e.g. for fuel, hydraulics, activated charcoal filter system, coolant and refrigerant, brake fluid and vacuum) and electrical wiring in their original positions. |
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| To avoid damage to lines, ensure sufficient clearance to all moving or hot components. |
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| When the engine is warm, the cooling system is under pressure. If necessary, release pressure before beginning repair work. |
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| Hoses are secured with spring-type clips. In case of repair, only use spring-type clips. |
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| Hose clip pliers -VAS 6340- are recommended to install spring-type clips. |
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| When installing coolant hoses, route stress-free so that they do not come into contact with other components (observe markings on coolant connection and hose). |
| Test for leaks in cooling system using cooling system tester -V.A.G 1274 B- and adapters -V.A.G 1274/8- and -V.A.G 1274/9-. |
| Assembly overview - parts of cooling system, body side → Chapter. |
| Assembly overview - parts of cooling system, engine side → Chapter. |
| Removing and installing coolant pump → Chapter. |
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