Welcome to Welham Group
Good old fashioned engineering since 1947
Welhams started in business just after the end of the second world war and we have always been proud of our engine reconditioning skills.
We can rebore cylinder blocks, recondition heads and regrind crankshafts as well as complete engine rebuilds.
We are members of the Federation of Engine Re-Manufacturers which ensures that all our work is carried out to a high professional standard.
Our Services
In addition to the work we do on the vintage diesel side, we offer the same services for common rail pumps and injectors all the way up to Euro6 standards.
Welham Diesel, established in 1964 as an offshoot of Welham Motor Company, specialises in servicing and refurbishing fuel pumps and injectors for agricultural machinery.
Despite their age, our crankshaft regrinding machines are still regarded as some of the best.
News & Case Studies

A Fantastic Weekend at Newark Vintage Tractor & Heritage Show 2026!
What a weekend! The Welhams team has returned from another fantastic Newark Vintage Tractor & Heritage Show, held on Saturday 7th and Sunday 8th November

We’re Heading Back to Newark – Calendars, Giveaways and More!
The countdown is officially on! The Welhams team is getting ready to return to one of the biggest weekends in the vintage machinery calendar: the

Two Classic Tractors: Bolinder-Munktell 470 vs Massey Ferguson 135
When it comes to classic tractors, everyone has their favourite! Some prefer the bigger, more powerful machines, while others love the smaller tractors that have
Our knowledge has been passed down the generations of skilled technicians here at Welhams
Proud members of