Thats not soot. That's pure disgusting unburnt fuel. HX40 is much to large of a turbo for a tuned merc diesel. Needs a smaller VNT/VGT badly.

The only reason that car can pump that much fuel is because of the modified injection pump. These cars aren't capable of jack **** with the stock 5.5mm elements.

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1981 300TD 4 speed manual
Euro bumpers, zender valance and skirts, H&R springs, billy HD's, leveled sls, real AMG Pentas 16x8 et11, vdo boost/egt gauges intergrated into ash tray, eurolights, led 3rd brake light