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Smoke and diesel knock after warm up

Discussion in 'Engine' started by Millfed, Dec 21, 2016.

  1. Millfed

    Millfed New Member

    May 30, 2011
    Swindon UK
    2x Mercedes (W211 & R171)
    While cold perfect (about 5mins). Then smoke with loads of soot in it. After further few minutes a diesel knock and missing lumpy drive. Not sure if it's fuel related or head gasket/ cracked block etc.
    It's started while driving along. Fine, been driving for an hour or so then loads of smoke suddenly and a very loud knocking noise. But when cold runs without any noise so I assumed it's diesel knock.
    Any ideas would great cheers.

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