| Turbocharger with charge air system, engines with code letters AXX, BPY, BWA |
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| Secure all hose connections with the correct type of hose clips (same as original equipment). |
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| Hose connections and hoses for charge air system must be free of oil and grease before assembly. However (applies only to plug-in connectors); the seal and the sealing surface of plug-in connectors should be lubricated lightly with oil → Chapter. |
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| Charge air system must be free of leaks, checking for leaks → Chapter. |
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| Renew self-locking nuts. |
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| Hose clip pliers -VAS 5024A- or spring-type clip pliers -V.A.G 1921- are recommended for installing spring-type hose clips. |
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| Fill turbocharger with engine oil at connection for oil supply line. |
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| After installing turbocharger, allow engine to idle for approx. 1 minute and do not rev up immediately to ensure turbocharger is supplied with oil. |
| Fitting hose connections with plug-in connectors → Chapter. |
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