| Rules for cleanliness when working on fuel supply system, injection system and turbocharger/supercharger |
| Even small amounts of dirt can cause malfunctions. For this reason, please observe the following rules when working on the fuel supply system, injection system and turbocharger/supercharger: |
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| Carefully clean connection points and the surrounding area with engine cleaner or brake cleaner and dry thoroughly before opening. |
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| Seal off open pipes/lines and connections immediately with clean plugs, e.g. from engine bung set -VAS 6122-. |
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| Place parts that have been removed on a clean surface and cover them over. Do not use fluffy cloths. |
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| Carefully cover or seal open components if repairs cannot be carried out immediately. |
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| Only install clean components; replacement parts should only be unpacked immediately prior to installation. Do not use parts that have been previously unpacked and stored away loose (e.g. in toolboxes, etc.). |
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| When the system is open: Do not work with compressed air. Do not move the vehicle unless absolutely necessary. |
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| Make sure that no fuel runs onto the fuel hoses. Should this occur, the fuel hoses must be cleaned again immediately. |
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| Protect unplugged electrical connectors against dirt and moisture and make sure connections are dry when attaching. |
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