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Proper DPF Cleaning Procedures: What to Look For

  • Writer: The Enviromotive Experts
    The Enviromotive Experts
  • Feb 24
  • 2 min read

There is a lot of information—and misinformation—about DPF cleaning procedures. Knowing the correct process is essential for maintaining diesel engines, reducing emissions, and ensuring filters last as long as possible.

This article covers the basics of diesel particulate filters (DPFs) and what a proper DPF cleaning procedure should include.


diesel particulate filter

What is a Diesel Particulate Filter (DPF)?

A DPF is an exhaust system component that captures soot and ash before they exit through the tailpipe. Over time, this filter fills up, restricting airflow and affecting engine performance.


As diesel engines run, the DPF traps particulate matter, preventing it from being released into the air. However, as the filter collects soot, exhaust flow decreases, creating backpressure that can degrade engine efficiency.

To prevent clogging, DPFs undergo a regeneration process, where high temperatures burn off collected soot, turning it into ash. While regeneration helps, it doesn’t remove all buildup—over time, ash accumulates and must be cleaned using specialized DPF cleaning equipment.


Steps for a Proper DPF Cleaning Procedure

Once removed from the vehicle, a DPF must go through a specialized cleaning process. This isn’t something that can be done with standard shop tools—it requires professional-grade DPF cleaning equipment designed for thorough and safe restoration.


1. Pre-Cleaning Inspection

Before cleaning begins, the DPF should be inspected for cracks, damage, and excessive ash buildup. Flow testing may also be performed to determine how restricted the filter is.


DPF Cleaning - Blast Cleaning


2. Pneumatic Cleaning (Air & Vacuum Process)

A proper DPF cleaning procedure uses high-pressure air to loosen trapped soot and powerful suction to extract it. The EvacuBlast Cleaning System is designed to target individual filter cells, removing stubborn soot that standard methods often leave behind.



DPF Cleaning - Thermal Regeneration


3. Thermal Regeneration (Baking Process)

For heavily clogged filters, baking in a specialized regeneration oven is necessary. High temperatures loosen hardened contaminants, making them easier to remove in the final cleaning stage.

Most shops bake and blast every DPF, restoring it as close as possible to a like-new state.


DPF Cleaning - Cooling and Final Check


4. Final Testing & Quality Check

After cleaning, the filter is inspected and tested to ensure it meets proper airflow and efficiency standards before being reinstalled.





Why Proper DPF Cleaning Matters

A clean diesel particulate filter improves engine efficiency, reduces emissions, and prevents costly repairs. Neglecting DPF cleaning procedures can lead to increased maintenance costs, unexpected downtime, and expensive full filter replacements.


Regular professional cleaning helps:

  1. Extend DPF lifespan

  2. Reduce fuel consumption

  3. Prevent regeneration failures

  4. Avoid engine performance issues


Get Expert DPF Cleaning Solutions

If you have questions about aftertreatment system maintenance or need professional DPF cleaning equipment, our team at Enviromotive can help.

📞 Call us at (800) 954-8265 to speak with an expert, or check out our EvacuBlast and EvacuFlush Cleaning Systems to see how we can help keep your filters in top condition.

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