Liqui Moly Pro-Line DPF Cleaner

Liqui Moly Pro-Line DPF Cleaner removes hardened and encrusted deposits from passenger car diesel particulate filters without removing the filter from the vehicle. It loosens soot deposits so they can be flushed and subsequently burned off during regeneration, helping restore engine performance and maintain low fuel consumption.

Suitable for passenger car diesel engines fitted with a diesel particulate filter (DPF/FAP). Regular cleaning followed by flushing can help prevent deposit-related problems and avoid expensive repairs.

Application

Apply using the Liqui Moly DPF Pressurised Tank Spray Gun (part number 7946) and DPF Probe with five interchangeable tips (part number 7945). Access the filter through a suitable opening, usually by removing its temperature or pressure sensor. The filter temperature must be below 40°C before cleaning.

Insert the appropriate probe and spray 1 litre of cleaner directly onto the filter surface at 6–8 bar. Spray in intervals of 5–10 seconds, pausing for 5–10 seconds between applications. Rotate and move the probe backwards and forwards to cover as much of the filter surface as possible.

Allow approximately 15 minutes for the cleaner to work, then flush with 500 ml of Liqui Moly Pro-Line Diesel Particulate Filter Purge using the same equipment and spray intervals. Refit the sensor and have the workshop initiate regeneration in accordance with the vehicle manufacturer’s instructions.

Important: Where the filter is positioned close to the exhaust manifold or turbocharger, take particular care to prevent cleaning or flushing fluid from entering the combustion chamber through an open exhaust valve. Follow the full product instructions and safety data sheet.