I hear lifter noise, and a regular diesel clatter at cold start. Nothing alarming or to be concerned about. Add some crane booster and call it a day. I'd eventually replace the lifters though.

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k