Secure all hose connections with hose clips which conform to production standard.
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The brackets for the hoses and the supercharger air system tubes must be free from oil and grease for fitting. 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.
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Renew self-locking nuts.
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Spring-type clip pliers -VAS 6499- or hose clip pliers -VAS 6340- are recommended for installation of spring-type clips.
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Fill turbocharger with engine oil at oil supply line connection.
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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.