BE PARTICULAR ABOUT DPFs
Klarius explains why type-approved replacement Diesel Particulate Filters ( DPFs ) are essential and points to consider to avoid costly warranty returns .
The rise in demand for type-approved replacement DPFs is becoming more apparent as more vehicles are emerging with DPFs as standard fitment . If one is fitted at the factory , it is a legal requirement for it to be present on the vehicle in order to pass an MOT test .
As routine service items , DPFs are consistently in demand . By supplying good quality aftermarket replacements to garages , motor factors can enjoy reliable sales opportunities at a fraction of prices quoted by dealers .
CATS AND DPFS
Many modern diesel engines will have a DPF and catalytic converter ( CAT ) in order to meet the latest emissions standards . In some cases , the units are separate and can be replaced individually . However , many are combined into one part . Increasingly , the trend is to move both nearer to the exhaust manifold so that they can attain the working temperature sooner .
For example , many recent Ford models have combined the DPF and CAT into the same canister and made it part of the exhaust manifold itself . This does protect the unit more from cold water splashes and mechanical impacts , but it is more expensive to replace if engine running issues cause damage .
THE VALUE OF QUALITY
Klarius produces all DPFs to type-approval standards , guaranteeing a reliable and compliant product .
FILTERING THE FACTS
Over time , a DPF fills up with soot and other particulates from the combustion process . It periodically goes through a renewal cycle where soot is burned off . Known as regeneration , the process creates a small amount of ash each time it happens , leading to the eventual blockage of the DPF ’ s internal ceramic monolith – requiring the component to be replaced as a service item .
DPFs are relatively expensive to replace especially when they are manufactured as one component . Whilst a lower quality aftermarket replacement may look the same as a premium , type-approved unit on the outside , their stark differences in quality are more evident inside the part – even though their prices are likely to be very similar . Type Approved CATs , DPFs and combined units from Klarius typically have full-sized ceramic monoliths with a generous precious metal surface coating that makes the catalytic process work in the case of the CATs and DPFs .
The DPF is required to reach a high operating temperature before the regeneration process occurs . This is typically attained during longer journeys . If the vehicle travels mainly on short journeys , the DPF is unable to regenerate properly and can become full of soot and ash very quickly . If a forced regeneration at the garage does not successfully clear the DPF , then a replacement will be required .
This means that the need for a DPF replacement due to excess soot can vary widely , depending on the driver and vehicle . Cars with particularly dirty engines and taken on shorter journeys will create more soot , filling the DPF more often with less chances to regenerate . It is possible to need a replacement after 20,000 miles even though the replacement should usually take place between 60,000 to 80,000 miles .
Quality aftermarket replacements offer a full sized internal ceramic monolith like the Klarius example ( top ) compared to an inferior replacement ’ s monolith that is noticeably reduced in size and therefore , performance ( bottom ).
Klarius offers one of the UK ’ s largest range of quality type-approved exhausts , CATs and DPFs that are all designed , manufactured and available from stock in the UK via FPS . For more information , contact your local FPS representative today .
6 DIESEL PARTICULATE FILTERS VITAL NEWS ISSUE 45