What Are DPFs ?

Most diesel cars are fitted with a Diesel Particulate Filter (DPF) which will eventually need to be cleaned. DPFs require a regular service to remove unburned lube oil that has accumulated in the DPF. The material that is removed from the DPF during cleaning is considered hazardous waste and must be properly handled and disposed of in a safe and controlled environment. An added benefit of having your DPF cleaned is improved performance. DPFs have thousands of small square channels made from porous, honeycomb ceramic material, delivering 99.9 percent Pm-free gas flows out the tailpipe. The filtering occurs as the flow passes through the square channelled wall. The Western Filters DPF Cleaning Service will recover alot of the lost performance of a reasonably aged, quality DPF. DPFs require a regular service known as ‘de-ashing’ or filter cleaning. This process is required to remove unburned lube oil that has accumulated in the DPF. Our DPF Cleaning Service is recognised as one of the best in the world.

What are EGRs ?

In internal combustion engines, Exhaust Gas Recirculation (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in petrol/gasoline and diesel engines. The exhaust gas recirculation valve is a component commonly found on many road going vehicles. EGR Valves work by recirculating a portion of an engine's exhaust gas back to the engine intake manifold, this along with air being returned from the PCV VALVE which is laden with oil (unless you have fitted a quality oil catch can !) mixes over time to produce a thick black oily sludge that is very hard to remove, until now ! Engine performance and efficiency is lowered, as a result of built up soot. We can clean EGR valves using the latest our latest technology machinery and have them looking like new ! Western Filters have a very fast turn around time to get you or your customers car back on the road in no time at all !

What are the Symptoms of a Faulty or Failing EGR Valve ? :: rough idling - indicates that the valve may be stuck in the ‘open' position :: engine performance acceleration issues and/or limp mode with decreased power or Check Engine Light keeps coming on - indicates stuck in the closed position.

MANN Provent Oil Catch Can Kits

Mann Provent Oil Catch Can Kits
To assist in future maintenance, purchase MANN Provent Kits available from our Online Store:
MANN Provent Vehicle Specific Oil Catch Can Kits

What are DOCs ?

Diesel Oxidation Catalyst (DOC). Increases oxidation of carbon in the DPF. DOC increases passive regeneration for improved fuel economy. Passive regeneration is an ongoing chemical process to oxidize carbon during a vehicle’s normal operation. “Self-Cleaning”. Active regeneration is a process that increases heat to oxidize excess carbon in the DPF.

What are CATs ?

A catalytic converter is an exhaust emission control device that converts toxic gases and pollutants in exhaust gas from an internal combustion engine to less toxic pollutants by catalyzing a redox reaction (an oxidation and a reduction reaction). Catalytic converters are used with internal combustion engines fuelled by either petrol (gasoline) or diesel—including lean-burn engines as well as kerosene heaters and stoves.

DPF Cleaning Additives

Will claim that they can clean your DPF, but are at best – only a band-aid or temporary fix. The only true method of cleaning a DPF is by removing it from the vehicle, where it can be professionally inspected and serviced. Our DPF Cleaning Service is recognised as one of the best in Australia and the world. The Western Filters DPF Cleaning Service will recover lost performance of a reasonably aged, quality DPF saving our customers $1000s of dollars.


Q. Will the DPF once cleaned, be warranted
A. No filter is warranted as such as we have no control over how the DPF is maintained. What we do guarantee is that the DPF is returned to a near new condition or a known condition which will give a comparable service life to the original so long as the vehicle is maintained and the driver understands how to maintain the DPF whilst operating the vehicle.

Q. Will it last as long as the original after it has been cleaned
A. Our experience shows that once vehicle owners and their mechanics understand how a DPF works and it has been professionally cleaned using our state of the art equipment and know how, the DPF will give many more km and years of service. Our experience with trucking companies and fleet owners show that with regular service intervals followed of 200,000km they are achieving over 800,000km. What caused the issue/How do I prevent this occurring again ?

The reasons for the DPF blocking are many, some of the more common one’s are;
• Wrong oil
• Stop/start city driving constantly
• Leaking exhaust joints
• Engine/DPF management components unserviceable

Q. What oil should I be using
A. The oil recommended by the vehicle manufacturer or its recognized equivalent, under no circumstance should any other oil specification ever be used.

Q. Do you supply aftermarket DPF
A. Yes we do supply quality aftermarket DPF’s and you deal with an Australian based company who will offer all assistance and advice to ensure the best outcome.

Q. I never knew it had one !
A. Since 2006 Diesel engines have had Particulate control measure as part of their pollution control systems. In cars the most popular system due to low maintenance and no need to worry about chemical additives, has been the DPF system which when correctly maintained and driven can achieve 200,000km or 10 years average driving, this is the expected service life of a DPF before it needs cleaning.

Q. Do the liquid cleaners work. My mechanic suggested I try that first.
A. We have heard of customers being charged up to $1000.00 for a liquid clean. A liquid clean however does not guarantee that the DPF is serviceable. When you have your DPF cleaned at Western Filters our technicians physically inspect the material and return the DPF to a known flow rate, ensuring the job is done right the first time.