Perth's Independent Exhaust Fitting Centre - Alastair Reid Garages

Perth 01738 622416

Guildtown 01821 640368

Diesel Filters

In Diesel engines the catalytic converter is replaced by a diesel particulate filter. These filters do require maintenance and can often lead to inefficient or poor running performance. Regular checks and cleaning are required. Alastair Reid will be able to advise on the best optimum performance and maintenance of your cars filter.

A diesel particulate filter (or DPF) is a device designed to remove diesel particulate matter or soot from the exhaust gas of a diesel engine. Wall-flow diesel particulate filters usually remove 85% or more of the soot, and under certain conditions can attain soot removal efficiencies of close to 100%. Some filters are single-use, intended for disposal and replacement once full of accumulated ash. Others are designed to burn off the accumulated particulate either passively through the use of a catalyst or by active means such as a fuel burner which heats the filter to soot combustion temperatures; engine programming to run when the filter is full in a manner that elevates exhaust temperature or produces high amounts of NOx to oxidise the accumulated ash, or through other methods. This is known as "filter regeneration". Cleaning is also required as part of periodic maintenance, and it must be done carefully to avoid damaging the filter. Failure of fuel injectors or turbochargers resulting in contamination of the filter with raw diesel or engine oil can also necessitate cleaning. The regeneration process occurs at road speeds higher than can generally be attained on city streets; vehicles driven exclusively at low speeds in urban traffic can require periodic trips at higher speeds to clean out the DPF. If the driver ignores the warning light and waits too long to operate the vehicle above 40 miles per hour (64 km/h), the DPF may not regenerate properly, and continued operation past that point may spoil the DPF completely so it must be replaced.

Maintenance

Filters require more maintenance than catalytic converters. Ash, a by-product of oil consumption from normal engine operation, builds up in the filter as it cannot be converted into a gas and pass through the walls of the filter. This increases the pressure before the filter. Warnings are given to the driver before filter restriction causes an issue with driveability or damage to the engine or filter develop. Regular filter maintenance is a necessity.

Why use Alastair Reid Garages?

Member of Good Garage Scheme - customer feedback available online

Peace of mind - knowing our trained technicians have access to the latest information for your vehicle

Full range of services in Perth garage and Guildtown garage - MOT, servicing, tyres, exhausts, engineering etc.

All makes and models of vehicles serviced and repaired

The only dedicated auto electrical repair service in a Perth garage

Know your costs - no hidden charges, service costs fixed upfront

We value your business and will do everything we can to ensure you are happy with every aspect of your visit

Proven - established in Perth area for over 60 years

Understanding your needs - independent Perth garage

Delivering consistent service focused on your needs and time-scales

Quality - feel safe with our 12 months parts and labour guarantee

Consistency - we subscribe to SMTA, Motor Codes and OFT Codes of Practice

Save time - we use the latest diagnostics equipment available in the industry

Convenience - choose Perth Garage our city centre location or Guildtown, with free courtesy car

Manufacturers Warranty is protected

Save money - our fixed and repair rates save you money on main dealer prices

What Our Customers Say

We use the Good Garage Scheme as an independent source of feedback for our customers. See what customers are saying about our garages

Feedback for our Guildtown Garage

Feedback for our Perth Garage

Visit with Confidence

You can visit Perth Exhausts Garages in complete confidence, knowing you will be looked after. Not only do we guarantee all of our work (parts and labour) for 12 months, we also subscribe to codes of practice. As a Bosch appointed service centre we adhere to the OFT code of conduct for garages, in addition we are members of the Scottish Motor Trade Association, Good Garage Scheme and Motor Codes, all of which give you security in the knowledge we will take care of you and your vehicle. In the unlikely event that you wish to challenge the work that Alastair Reid Garages have undertaken, then please contact the garage directly in the first instance. Should you not be happy that this issue is resolved then you can contact Motor Codes via their website, they provide dispute resolution services on behalf of Alastair Reid Garages.