DPF Cleaning (Diesel Particulate Filter)

 

DPF Cleaning is the process of removing your DPF and using specialised machinery to unblock the filter and let the engine exhaust correctly. We use a process called flash cleaning. The machinery we use involves an investment of over £30,000 and needs to be shipped in from Italy.

WHAT WE OFFER

We offer a full removal, professional cleaning (not re-generation), and re-fitting service from £250 + Vat.

Call our workshop for availability on 01792 477 555 (Option 2)

Please note that this service is not an ON VEHICLE cleaning service, these are a regeneration (see below) and are not as efficient or as long lasting as the service we offer.

We use top of the range technology for a safe, thorough clean of your DPF. DPF replacement can be very costly, whereas cleaning can save you a great deal of money.

  • High success rate within a 48hr turnaround
  • 12 month ‘No Quibble’ Guarantee
  • No charge if we can’t clean your DPF
  • Unrivalled, expert customer service

An example of the machines used to clean your DPF

 

A PROFESSIONAL LONG TERM SOLUTIONdpf cleaning light

DPF cleaning is the only professional long term solution for DPF problems other than a costly replacement (Around £1200!)

WE  OFFER A FULL PROFESSIONAL CLEANING SERVICE FOR CAR AND LIGHT COMMERCIAL DIESEL PARTICULATE FILTERS (DPF’s)

Prices Start at £250 + Vat with 12 months ‘No Quibble Guarantee!

What is a DPF?

A diesel particulate filter (DPF) is a device which sits in the exhaust system, it “captures” soot / diesel particulate and other nasty particles so they are not released into atmosphere.  A diesel particulate filter can remove upwards of 85% of the particles from the exhaust, reducing harmful emissions.

The DPF physically captures the soot and ash particles in a net or mesh like structure within the filter.

DPF regeneration / cleaningdpf cleaning

There are two different types of DPF regeneration that are commonly used. These are active and passive. Which ever your car uses you’ll still have to meet some strict conditions in order for the regeneration to start. It’s usually a combination of engine temperature, speed and RPM. A rule of thumb is that the engine needs to have reached normal operating temperature, you’re travelling at more than 40MPH and the RPM (revs) of your engine is at least 2500 RPM. Depending on how blocked or effective your regeneration will determine how long it needs to be performed.

DPF Regeneration Conditions

  • Engine at normal operating temperature
  • At least 40MPH
  • At least 2500RPM
  • Fingers crossed!

BELOW IS AN EXPLANATION OF THE DIFFERENT TYPES OF REGENERATION (CLEANING).

Active Regeneration

Active regeneration of the DPF is performed by the ECU triggering a post combustion fuel injection. This increases the temperature in the DPF, burning off the soot and particles that build up in the filter. This type of regeneration can cause higher than normal fuel usage.

Passive Regeneration

Passive DPF regeneration takes place automatically on motorway-type runs when the exhaust temperature is high. Many manufacturers have moved to using active regeneration as many motorists do not often drive prolonged distances at motorway speeds. Passive regeneration often uses a DPF additive

What is a DPF additive?

Some manufactures utilise a DPF additive which is automatically added to the fuel. This additive is used to increase the chance of a passive regeneration. The additive allows the soot and ash to be “burnt” at a much lower temperature than that required during an active regeneration. The additive is usually replenished during servicing as part of manufactures guidelines.

Forced Regeneration

Forced regeneration is a way of cleaning the DPF using a maintenance process which has been built in by the vehicle manufacturer. This process can only be started by either a main dealer / mechanic with the right tools and access to the vehicles management systems. This process usually involves kicking off a DPF clean cycle in the workshop which runs the car at a high RPM for a considerable period of time. The ECU ensures that this cycle heats up the DPF filter to an extreme temperature, burning off the contents of the filter. It some cases the ECU injects fuel into the post combustion process to achieve these temperatures. In most cases the engine oil will need to be changed as the vehicle will literally “cook” the lubricant.

Can I clean my DPF and do cleaning additives actually work?

This type of product is very new to the market, targeting those suffering with DPF issues.

 

Do DPF cleaning additives work?

NO. Fuel additives have been attributed with reducing emissions and soot from the fuel burning process which could reduce the chance of the DPF being blocked. Claims that an additive can unblock the DPF and extinguish the warning light are simply untrue. By the time the additive has been through the combustion process there will be very little left and certainly won’t be capable of unblocking the DPF.

Can I remove my DPF?

Due to the high costs of replacing diesel particulate filters, a whole industry has emerged around removing the devices completely (DPF removal). This involves replacing the unit with a pass through pipe or modifying the existing unit and removing the mesh or filters inside.

The removal of the DPF will cause an ECU error and therefore the service will  also include the removal of the error and re- programming from the ECU software.

The marketing of these services often includes claims of reduced running costs, extra power and increased efficiency. Recent evidence shows when a Diesel Particulate Filter has been removed, rather than cleaned or replaced, the back pressure of which the turbo relies on is altered. This results in the turbo charger performance being seriously affected which will lead to its inevitable early failure, and another very costly issue to deal with.

FROM FEBRUARY 2014 THIS PROCESS IS ILLEGAL

THE FOLLOWING IS TAKEN FROM THE GOV.UK WEBSITE.

Tests for diesel cars and lorries are to be tightened up to ensure vehicles have a critical exhaust filter if one had originally been fitted as standard, Roads Minister Robert Goodwill has announced.

Garages and testing stations will be required to check for a diesel particulate filter (DPF) in the inspection of the exhaust system as part of the MOT test (or annual test for heavy vehicles) from February 2014.

The vehicle will automatically fail the MOT test if the filter had been fitted as standard but is found to be no longer present.

The filter works by trapping solid particulate matter from exhaust gases. This type of filter has been in use for more than 20 years and helps meet European emission standards, improving air quality and health standards.

Some firms offer services to remove the filter, claiming it will improve the economy. But it is an offence to drive a vehicle that has been modified this way, as it will no longer meet the emissions standards the car achieved when it was approved for sale in the UK.

Roads Minister Robert Goodwill said:

I am very concerned that vehicles are being modified in a way that is clearly detrimental to people’s health and undoes the hard work car manufacturers have taken to improve emissions standards. It has become apparent the government had to intervene to clarify the position on particulate filter removal given the unacceptable negative impact on air quality.

This change to the MOT tests makes it clear – if you have this filter removed from your car it will fail the test.

You can view the original publication from the Government Here