Diesel vehicles used for short trips and city traffic are especially affected by clogged diesel particulate filters

LIQUI MOLY says that with its products, workshops can offer a professional diesel particulate filter (DPF) service.
In order to reduce the emissions of diesel vehicles, the DPF collects most of all soot particles generated during the combustion process in the engine.
For the filter to clean itself or “regenerate” while driving, the exhaust gas temperature must exceed the soot ignition temperature of more than 500 degrees Celsius to burn the deposited soot.
Ash remains in the filter as residue. However, the temperature required for burning off the soot in the particulate filter during regeneration mode often cannot be reached, especially when frequently driving short distances or in stop-and-go traffic.
Both the unburned soot and the ash residues from the combustion block the air flow over time, which reduces the effectiveness of the filter and can have serious consequences.
These consequences include, but are not limited to, acute risk of turbocharger or engine damage, increasing fuel consumption and decreasing engine output, reduced throttle response due to the increased exhaust back pressure, or impairment of the turbocharger, particulate filter and EGR system.
For this reason, it makes sense for repair shops to offer a professional DPF service.
LIQUI MOLY says a major advantage of its products for professional DPF servicing is that the DPF can remain installed, with no time-consuming and costly removal necessary.
To do the service, LIQUI MOLY says you only need the Pro-Line Diesel Particulate Filter Cleaner and the Pro-Line Diesel Particulate Filter Purge products.
LIQUI MOLY states the cleaning and purging can be carried out with the DPF Pressurized Tank Spray Gun and the specially developed DPF lance with five interchangeable tips. When cleaning large diameter units, it says you should also use the DPF Spray Probe Long.
Cleaning is undertaken by removing a temperature or other sensors from the DPF unit. The highly effective Pro-Line Diesel Particulate Filter Cleaner then dissolves hard, dense or encrusted dirt on the surface of diesel particulate filter, with the cleaner and the dissolved soot then remaining in the DPF.
In order for these to be burned off by normal regeneration, the material must be flushed off and distributed in the DPF, and the cleaner must be neutralised by purging. LIQUI MOLY says the Pro-Line Diesel Particulate Filter Purge does this job.
To complete cleaning, LIQUI MOLY says a suitable scan tool or diagnostic software is required for final DPF regeneration in accordance with the current manufacturer’s specifications.
LIQUI MOLY says its products are water-based and non-flammable and if DPF regeneration is performed in accordance with the vehicle manufacturer’s specifications, fire in or damage to the DPF or adjacent systems is ruled out.
If the DPF is loaded with too much ash, cleaning does not help anymore, and the filter must then be removed and replaced, warns LIQUI MOLY.
In order to delay this work as much as possible and increase the service life of the DPF, regular prevention is important.
LIQUI MOLY states the interval is highly dependent on vehicle use and DPF age or mileage and it therefore recommends a professional diesel particulate filter cleaning service at 30.000 to 50.000 kilometers.

For more from LIQUI MOLY, visit www.liqui-moly.com.au