Diesel particulate filters (DPFs) are an essential part of modern diesel engines, helping to reduce harmful emissions by trapping soot and other particles. However, over time, DPFs can become clogged, leading to reduced engine performance and increased emissions. When this happens, DPF cleaning is necessary to restore the filter’s efficiency and prolong the life of your engine.
There are two main methods of DPF cleaning: on-car and off-car. Both have their benefits and drawbacks and understanding the differences between these methods will help you determine which is the best option for your diesel engine.
DPF cleaning involves removing the soot, ash and other particulates that have accumulated in the filter. These contaminants can restrict the flow of exhaust gases, leading to a range of problems, from reduced fuel efficiency to engine failure.
Cleaning your DPF is crucial if you notice symptoms of a clogged DPF such as:
If left untreated, a blocked DPF can lead to more significant issues, including the need for costly DPF repair or even a full DPF replacement. Regular DPF cleaning can help you avoid these expenses and keep your engine running efficiently.
On-car DPF cleaning, as the name suggests, is performed while the DPF is still installed on the vehicle. This method typically involves the use of cleaning additives or specialised equipment that cleans the DPF without removing it from the engine.
There are several different approaches to on-car DPF cleaning, including:
One of the biggest advantages of on-car DPF cleaning is convenience. Because the filter remains in the vehicle, this method is generally faster and less labour-intensive than off-car cleaning. As a result, on-car DPF cleaning is often more affordable and can be completed while you wait at the garage.
In addition to being quicker and less expensive, on-car cleaning can be an effective solution for minor DPF blockages. If your DPF is only slightly clogged and still capable of regeneration, an on-car cleaning method may be all that’s required to restore your vehicle’s performance.
Despite its convenience, on-car DPF cleaning is not always the best option for heavily clogged DPFs. Chemical cleaning and regeneration methods may not be powerful enough to fully remove thick layers of soot and ash, meaning that the problem could return soon after cleaning.
On-car DPF cleaning may also be less thorough than off-car cleaning, particularly if the filter is severely blocked. In cases where the DPF is too clogged to be effectively cleaned in place, off-car cleaning may be the better option.
Off-car DPF cleaning involves removing the DPF from the vehicle and using specialised equipment to clean it outside the engine. This method typically involves a combination of high-pressure air, water and heat to remove all contaminants from the filter.
Because off-car DPF cleaning allows technicians to fully access the filter and use more powerful cleaning tools, this method is often more effective for heavily clogged DPFs. It is a more thorough process and can restore the filter to near-new condition, removing even the most stubborn blockages.
The main benefit of off-car DPF cleaning is its effectiveness. When your DPF is heavily blocked or has accumulated a significant amount of ash, off-car cleaning is the best way to ensure that all contaminants are removed.
Off-car cleaning is also more thorough, as it allows technicians to inspect the DPF for any damage or wear that might not be visible during on-car cleaning. This can help prevent future blockages and ensure the filter is in good condition.
For those dealing with persistent clogged DPF problems or considering a DPF repair, off-car cleaning may be the most effective solution. By fully restoring the filter, off-car cleaning can help prolong the life of your DPF and improve your vehicle’s performance.
The biggest drawback of off-car DPF cleaning is the cost. Because this method requires more labour and equipment, it is generally more expensive than on-car cleaning. In addition to higher labour costs, off-car cleaning can also take longer to complete, as the filter must be removed, cleaned and then reinstalled.
Off-car cleaning may also be overkill for vehicles with only minor DPF blockages. If your DPF is only slightly clogged and still capable of regeneration, on-car cleaning may be sufficient.
The choice between on-car and off-car DPF cleaning depends largely on the condition of your DPF and your budget. For minor blockages and routine maintenance, on-car cleaning may be the more convenient and cost-effective option. However, if your DPF is severely blocked or you’ve experienced repeated problems with clogged DPF issues, off-car cleaning is likely to provide a more thorough and long-lasting solution.
Regardless of which method you choose, regular DPF cleaning is essential to maintaining your vehicle’s performance and avoiding costly repairs or replacements. By cleaning your DPF before it becomes severely blocked, you can avoid the need for DPF repair or replacement and keep your diesel engine running smoothly.
Both on-car and off-car DPF cleaning methods have their advantages and disadvantages. If your DPF is only slightly blocked, an on-car cleaning may be enough to restore performance. However, for heavily clogged filters or recurring issues, off-car cleaning provides a more thorough solution.
For expert advice on which method is best for your diesel engine or if you need professional DPF cleaning, repair or replacement, contact DPF Clean Team. Our experienced technicians will assess your DPF and recommend the most effective solution for keeping your engine running smoothly.