Diesel Engine Repair & Service.

We know how critical uptime is to your success. When a light comes on or an engine goes down, our service team quickly responds to resolve the issue and get you back on the road as quickly as possible.


  • Maintenance

    Running low on fluids? Need diesel particulate filter cleaning service? We perform routine tune-ups to keep your engine running at maximum power and efficiency.

  • Diagnostics

    Running at low power? Service light on? Our diesel service centers are equipped with electronically controlled dynamoters to quickly identify service issues, facilitate repeatable testing, and deliver precision reporting.

  • Repairs

    Problems with an EGR valve? Leaking oil? Our factory-certified diesel mechanics are trained to identify the problem and fix any diesel engine. Class 8 trucks, medium duty trucks, vans, buses and RVs, even heavy construction equipment - if you need diesel engine repairs, Consider It Done.

  • Engine Overhaul

    Not ready to invest in a new truck? We can break down, clean, service, repair, and re-assemble your failing engine block to prolong the lifespan of your diesel engine.

Consider It Done.

You depend on your engine every minute of every day. We are dedicated to servicing your truck with a focus on dependable results and minimum downtime.

100+ Years Experience.

When you're down, you're losing money. Don't trust your investment to just anyone. Put it in the hands of a dedicated, experienced service team who knows exactly what it takes to get you back on the road.

  • Fully equipped fleet of field service trucks; ask about our mobile breakdown service
  • Factory-certified, best-trained diesel mechanics
  • Priority placed on driver and fleet manager communication
  • Over 25 diesel engine shops around the country
  • All-makes wholesale truck parts distributor
  • Complete line of genuine OEM, aftermarket and hard-to-find parts in stock to facilitate fast service & repairs


W.W. Williams knows me and treats me well. I never have any issues with them and they take the time to get to know their customers. 

Automotive Repair Shop Stock Engine Service

I have done business with W.W. Williams before and they have always been very helpful. They make sure everything is done correctly and their turnaround time is reasonable.  

Diesel Engine Manufacturer Detroit Diesel Engine Service

W.W. Williams got the job done in a timely fashion and the prices were fair. 

Specialized Tree Company Diesel Engine Service

There are never any issues with W.W. Williams, and on the rare chance that there are, they always take good care of us and communicate.  

Bus Air Conditioning Company Diesel Engine Service

W.W. Williams has good communication and follow-through. The employees are friendly. 

Casino Resort Diesel Engine Service

As a big company, it is important to me that W.W. Williams is there when I call them. There is never any hesitation when it comes to communication. 

Mining Company Diesel Engine Service

W.W. Williams provides good customer service.  

Truck Repair Shop Stock Engine Service

W.W. Williams knows me and treats me well. I never have any issues with them and they take the time to get to know their customers. 

Automotive Repair Shop Stock Engine Service

W.W. Williams’ employees are nice to work with and they are knowledgeable. 

Local Department of Education Detroit Diesel Engine Service

W.W. Williams was very responsive and were willing to help. 

Cleaning Company Diesel Engine Service

All Makes. All Models

If it's a diesel engine, our mechanics can fix it. We represent an unparalleled diesel engine product line, including service provider partnerships with Detroit Diesel, Deutz Engines, and mtu.

WheelTime Promise

Get It Done Right, The First Time.

W.W. Williams is a member of the WheelTime Service Network, a network of service locations across the US and Canada dedicated to getting you back on the road in the shortest possible time.

The Wheeltime Promise
  • Initial assessment within two hours of arrival
  • Completed repairs in the fastest time possible
  • We will meet the cost estimate given
  • We will meet the time estimate given
  • We will notify you within 30 minutes after last labor
  • We will do it right, the first time