At Welsh Diesel we offer, but are not limited to, the following services:
Aftercoolers
Battery testing and replacements
Coolant flushes or leak repairs
Electrical and alternator service
Electronic diagnostics and repair
Engine and gearbox repair + rebuilds
Engine and gearbox diagnostic services
Engine cooling
Fuel/oil additives
Fuel systems
Generator service + repairs
Hydraulic leaks
Injectors
Inverter repairs + installs
Lighting repairs, upgrades, and installs
Oil changes
On-site service + repairs
Preventative repairs
Steering system repairs
Water impellers
Welding
Battery testing and replacements
Body and hardware repairs
Brakes
Coolant flushes or leak repairs
Cutting edges
DPF regenerations and repairs
Electrical and alternator service
Electronic diagnostics and repair
Engine and transmission repair + rebuilds
Engine, transmission, and brake diagnostic services
Exhaust and intake repairs
Final Drives
Front + rear differential services
Fuel/oil additives
Fuel systems
Generator service + repairs
Glass replacements
HVAC repair
Hydraulic cylinder rebuilds
Hydraulic leaks
Hydraulic repairs
Injectors
Lighting repairs, upgrades, and installs
Oil changes
On-site service + repairs
Pin + bushing repairs
Preventative repairs
Radiator + engine cooling
Tracks + Undercarriages
Welding
Wiring
Battery testing and replacements
Body and hardware repairs
Coolant flushes or leak repairs
DOT inspections
DPF regenerations and repairs
Electrical and alternator service
Electronic diagnostics and repair
Engine and transmission repair + rebuilds
All of our engine builds are built specific to each customer’s needs, wants, budgets and power goals. We can either order you a new/reman long block or rebuild your current engine.
As with our engine builds, all transmission builds are specific to each customer’s needs

Engine, transmission, and brake diagnostic services
Exhaust and intake
Front + rear differential services
Fuel/oil additives
Fuel systems
Generator service + repairs
HVAC repair
Hydraulic leaks and repairs
Injectors
Inverter repairs + installs
Lighting repairs, upgrades, and installs
Oil changes
On-site service + repairs
Preventative repairs
Radiator + engine cooling
Steering system repairs
Suspension repairs or replacements
Truck + trailer brakes and air systems
Welding
Wiring
Whether you’re need repairs or looking for performance upgrades, we make sure our services are affordable and reliable. With an experienced and honest team looking after you, you can always be sure that you’re getting the best service for you and your vehicle, with no unnecessary repairs or hidden costs.
You depend on your engine every minute of every day. We are dedicated to servicing your vehicle with a focus on dependable results and minimum downtime.
Battery testing and replacements
Body and hardware repairs
Brakes
Coolant flushes or leak repairs
DPF regenerations and repairs
EFI Live Tuning
Electrical and alternator service
Electronic diagnostics and repair
Engine and transmission repair + rebuilds
All of our engine builds are built specific to each customer’s needs, wants, budgets and power goals. We can either order you a new/reman long block or rebuild your current engine.

As with our engine builds, all transmission builds are specific to each customer’s needs
Engine, transmission, and brake diagnostic services
Exhaust and intake repairs or upgrades
Front + rear differential services
Fuel/oil additives
Fuel systems
Headstuds
HVAC repair
Injectors
Lift Kits
Lift Pumps
Lighting repairs, upgrades, and installs
Oil changes
On-site service + repairs
Preventative repairs
Radiator + engine cooling
Steering system repairs
Suspension repairs or replacements
Turbos
Welding
Wiring
When emergencies call, lives depend on your vehicles and equipment. Whether you need a replacement part, engine repair, or 10,000 feet of hose—consider it done.
PRIORITY SERVICE FOR EMERGENCY EQUIPMENT.
Aerial ladder service + structural repairs
Foam system repairs and installations
Fire pump and gearbox repairs (we are not currently able to do annual testing but we will be working on that soon)
Battery testing and replacements
Body and hardware repairs
Coolant flushes or leak repairs
DOT inspections
DPF regenerations and repairs
Electrical and alternator service
Electronic diagnostics and repair
Engine and transmission repair + rebuilds
Engine, transmission, and brake diagnostic services
Exhaust and intake repairs
Front + rear differential services
Fuel/oil additives
Fuel systems
Generator service + repairs
Heavy duty engine PM services
HVAC repair
Hydraulic cylinder rebuilds
Hydraulic leaks
Hydraulic repairs
Injectors
Inverter repairs + installs
Lighting repairs, upgrades, and complete installs
Oil changes
On-site service + repairs
Preventative Maintenance
Radiator + engine cooling
Steering system repairs
Suspension repairs or replacements
Truck + trailer brakes and air systems
Welding
Wiring
Battery testing and replacements
Body and hardware repairs
Coolant flushes or leak repairs
DPF regenerations and repairs
Electrical and alternator service
Electronic diagnostics and repair
Engine and transmission repair + rebuilds
Engine, transmission, and brake diagnostic services
Exhaust and intake repairs
Front + rear differentials
Fuel/oil additives
Fuel systems
GPS guidance repairs
HVAC repair
Hydraulic cylinder rebuilds
Hydraulic leaks
Hydraulic repairs
Injectors
Inverter repairs + installs
Lighting repairs, upgrades, and installs
Oil changes
On-site service + repairs
Preventative repairs
Radiator + engine cooling
Steering system repairs
Suspension repairs or replacements
Welding
Wiring
We are not just limited to mechanic work at Welsh Diesel.
We have the capabilities to weld steel, stainless, and aluminum both in the shop or in the field.
GMAW (Mig)
GTAW (Tig)
SMAW (Stick)
Brazing
I'm from out of state and Andrew his team took amazing care of me. Got me back on the road and taken care of at a great price. I wish I could use him as my full-time mechanic. If you are local, I wouldn't let anyone else touch your truck.
Unbelievably GREAT! Wish there were six stars. I called 7 other marine diesel services and only Andrew Welsh could step up and deliver. Forget Greg Poole and the big shops! Thanks Andrew!
Had a Heater Core hose bust on us in the middle of a project we started early this morning and barely made it to Welsh Diesel before it was necessary to tow. Thankfully Andrew and the crew jumped right onto repairing the truck as the local O’Riley’s had the part in stock. I’m grateful to have such a professional and capable facility so close to home as they have always made us feel like a priority. Nothing but great things to say about Welsh Diesel and the family here to support us. What a blessing, truly!!!!
"This diesel shop is beyond great. Excellent service and great workers! Andrew is always friendly and very knowledgeable. I've had some minor issues with my vehicle and he was quick to help me out saving me money and time. I recommend him and his team very highly. I've had shops take me for a ride in the past but this shop is honest and professional in all they do!"
"They guys at Welsh are amazing. They were helping me diagnose my truck over the phone before i even brought the truck in. After i was in over my head they fixed it right up. Did their own diagnosis gave me my options and got me squared away within a week. These guys will have my business for any diesel issues i come across."
"My mother in law was in town and her check engine light came and her Audi was having issues starting. We were referred here from someone very reputable so we went. Andrew went well above and beyond to work on her car, scan codes even kept it overnight and made sure everything was OK with her car as she lives 7 hours from here. I can't thank you enough for helping her in time of need and you have gained my service as well. Thanks"
"Amazing service! Fast, friendly and knowledgeable team and company!! Andrew is a very good mechanic with wonderful service provisions! I would recommend to anyone 1000%! Thank you Andrew and your team for outstanding service and incredible helpfulness! Will never go anywhere else for care of the diesel vehicles in this family!"
"Wife and I were coming to town, we were in need of some work while truck was down. We made one call only and Andrew responded. He was understanding willing and solved our issue. It's rare on the road you find anyone that isn't just out to bleed you dry at any opportunity. You can tell that is not what they are about!! Fully recommend this shop."
Drove my Duramax from 1 hour away for an injector issue and I can say Great Service! From calling to dropping off and picking up! Thanks to Welsh Diesel I was able to smoothly ride back home! Will be back!
Work willingly at whatever you do, as though you were working for the Lord rather than for people. Colossians 3:23