Thomas Group Blog Posts

Under Pressure: Part 2 of the diesel injection evolution

In the first part of The Diesel Injection Evolution I wrote about how the pressure changes had made smaller fuel droplets possible so that the fuel burning became more efficient and less polluting with the advantage of a more flexible power range. The higher Common rail pressures of 25000 psi and greater are only […]


In these uncertain times we want to reassure you that Thomas Group Ltd are still fully operational as of Tuesday 17th March. Our sales team are all working and our warehouse are still dispatching goods as normal. To limit the risk of COVID-19 and to allow us to keep servicing as normal, as well as […]

Coming clean about diesel

Four years on, and the aftermath of the diesel emissions scandal continues to hamper consumer confidence in diesel. Once accepted as, and still very much today, a super clean, efficient fuel source, its reputation has been tarnished in recent years, thanks largely too often inaccurate and misinformed headlines in the media. Here, Delphi Technologies, a […]

Fuel Filter Seasonal Maintenance

Marine Gasoline Spin-on Fuel Filter Seasonal Maintenance Spring will be here soon and it’s almost time to go boating! But let’s be safe boaters while we’re having fun. Prepare your boat properly and take the time to ensure all components are in safe, working order. Racor recommends that owners of gasoline powered boats inspect their […]

2035 petrol and diesel ban an “unworkable fantasy”, Klarius claims

Aftermarket emissions manufacturer slams this week’s announcement claiming it was made for “short term political gains” Klarius has this week slammed the government’s announcement to bring forward its ban on sales of new petrol and diesel cars from 2040 to 2035. In a statement, Klarius said: “Using government policy to improve safety and push society toward a […]

Bosch announces diesel breakthrough

New Bosch technologies already make it possible to achieve an average of 13 mg/km NOx New enhanced diesel technology has been revealed, promising a sustained reduction in nitrogen oxide emissions. Announcing its technological breakthrough, Bosch says it can make diesel about as clean as a petrol engine. A Bosch spokesperson said: “It means diesel is […]

Signs it’s time to replace your glow plugs

Glow plugs have a long lifespan, however they do gradually deteriorate due to wear and tear. So how do you know if a set of glow plugs needs replacing? In this article, we look at six common signs that indicate glow plugs could be faulty or damaged. Something’s wrong: the engine warning light The engine […]

Delphi Parts

Does your engine use Delphi (Lucas, CAV) injection equipment? Injection Pumps Injectors Feed Pumps Filtration Engine Management GDi Genuine parts for next day delivery. If you don’t see what you need please ask. For older parts visit Thomas Classic Diesel.

Parker Racor Turbine Fuel Filters

World leading fuel filtration for industrial and marine applications. Fantastically efficient at separating water from fuel using Racor’s unique Aquabloc media technology. Fast change, no tools required, element change, and available in 2,10 & 30 micron. Click this link for more information and full technical spec on the range of Parker Racor filtration including turbine […]

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