About Us

About NWDiesel

What We do…

Like our name says, we are all about our diesels! We offer full-service Repairs, Advanced Diagnostics, Service, Maintenance, and Conversions. We employ top diesel talent and offer top grade service. NW Diesel takes great pride in our work and we enjoy helping our community with their diesel repair needs. We only use top OE quality parts as well as top aftermarket performance brands in each of our repairs. The service does not stop there! NW Diesel proudly stands behind our work and we offer leading warranties on all our work, so that you can rest easy knowing your repairs will be fully backed.

Diesel Repair and Service:

NW Diesel offers repair services for most diesel vehicles and pick up trucks, as well as equipment engines.

Advanced Diagnostics & Tuning

  • Electrical diagnostics
  • Diesel Diagnostics
  • Chassis diagnostics
  • Tuning and Computer reprogramming for select vehicles

Diesel Engine Rebuilds

  • We offer Full engine overhauls and Select machining services

General Repair

Repair and maintenance on Domestic and most European diesel engines

  • Powerstroke
  • Cummins
  • Duramax
  • Mercedes
  • TDI
  • Isuzu
  • CRD, VM Motri

Heavy Equipment & Marine Engines:

  • Volvo
  • Detroit
  • Caterpillar (CAT)
  • Kubota
  • Yanmar
  • John Deere
  • Ford-Leman
  • Perkins
  • Hercules
  • Cummins
  • International

Performance Builds & Tuning

  • We offer custom performance builds and proprietary parts designed for your power goals.
  • Aftermarket upgrades including Turbochargers, Injectors & fueling, Tuning and more.
  • Now offering in house Dyno!

Jeep & Off-Road

  • Off-road parts and custom off-road builds
  • Lifts and Suspension work
  • Aftermarket bumpers, winch installs
  • Fabrication and custom builds

Diesel Conversions

  • Specialty diesel conversions

Who We Serve…

Service Areas:

Located in Marysville, WA NW Diesel is grateful to have customers from Snohomish county, King County, Skagit County, Whatcom County, as well as Eastern Washington and the Olympic peninsula. Although we are in Washington state, we proudly serve customers from all over the country for our custom diesel conversions, part sales and performance builds! Located in Marysville, WA NW Diesel is grateful to have customers from Snohomish county, King County, Skagit County, Whatcom County, as well as Eastern Washington and the Olympic peninsula. Although we are in Washington state, we proudly serve customers from all over the country for our custom diesel conversions, part sales and performance builds!

Military Discounts We deeply appreciate all our customers that have served our country! The least we can do is offer some great discounts for those who have risked it all for our country.

Keep you Working! NW Diesel also understands the vital role that a diesel can play for work. We make scheduling priority for those customers that use their diesel for work.

Retail Customers (In-person and Online)

Fleet Service and Wholesale Dealers

  • Have a fleet? No problem, we can build a maintenance program to fit your business needs
  • Wholesale accounts are available, we can do inspections, safety checks as well as general service and repair for wholesale dealers

Where it all started….

It all started on a farm and grew into a passion!

The founder, Ethan Olsen grew up on a farm in the rural mid-west and southern USA. His interest in motors started from a young age, when he learned how to drive the tractor and the farm equipment. Always tinkering with something, Ethan was known for taking everything apart just to see how it worked. Growing up, Ethan’s passion for being a mechanic grew as he worked his way up in small repair shops and working with various fleets. Finishing school and becoming an ASE Certified technician; Ethan gained hands-on experience in a variety of diesel applications, including construction equipment, dealerships, and Marine repair. Continuing to grow, Ethan built his reputation for his ingenuity and diesel knowledge; by doing unheard of diesel modifications as well as diesel conversions from home. He realized that his builds really sparked interest in the community and soon grew to be his own operation. Always working with diesel trucks and equipment he saw the lack of fair and honest diesel repair services around. So, he decided to offer his expertise and services for the greater good, by opening general repairs to the area. Opening a shop that offered FAIR and Transparent Pricing was the foundation on which the shop was established. Hence, the birth of NW Diesel! NW Diesel is so grateful for each one of our customers and has deeply become invested in offering QUALITY service that will not break the bank.