Engine decarbonisation
Category: Mechanical repair & servicing
Also known as: carbon clean, hydrogen cleaning, descarbonización, EGR cleaning, emissions test failed
Cleaning carbon deposits out of a running engine without stripping it — usually a hydrogen or ultrasonic machine connected to the intake for half an hour or so — to free sticky valves, EGR and turbo vanes, and recover lost power, smoother idle and a cleaner emissions test. A fix for a clogged DPF or a worn engine it is not.