Marini Diesel Inc. is a Full Service Parts and Service Cummins Dealer for All Truck Makes with competitive prices. We specialize in a full line of all makes chassis parts and all makes engine parts. Our full service shop can handle repairs on all makes bumper to bumper for Freightliner, Volvo, Kenworth, Peterbilt, International, Western Star. We can handle any engine repairs and rebuilds for Cummins, Cat Caterpillar, Detroit Diesel, International.  We have a State of the Art - DPF Cleaning machine and testing equipment. We have Mobile Service for On-Site Repairs available 24/7.  We offer Free parts delivery anywhere in the Denver Metro Area!  We also offer Pickup and Delivery for Fleets that are scheduling trucks for repairs in our shop!  One call does it all!

We also have an in-house full service engine machine shop 

TESTIMONIAL
​GREATNESS

We had an emergency on one of our trucks. We needed a part at the last minute so a unit could go out first thing in the am.
I called Marini Diesel and within an hour of calling them, we had the part in hand.

Many thanks to Sam and his team at Marini Diesel for handling up in such a quick manner. Good folks over there. Not good golfers but good people. If you run into them somewhere, make sure to say thank you for the outstanding service they provided in this instance and the many others they come through on.

Doug Smith
Arnold’s Custom Seeding, LLC
Engine Parts and Service for the following manufacturers:
  • Cat 3406B - 3406E - C12 - C13 - C15 - 3116 - 3306 - 3176 - 3408 and various others     
  • Cummins Engines All Models and Applications including Onan Generators     
  • Detroit Diesel Series 60 - 6V92 and various other Detroit Diesel Models and applications   
  • Various Diesel Applications Makes and Models like DT466 - DT466E
  • Cat and Cummins Certified Technicians
Eaton Transmission Service and Parts
Factory trained and certified technicians
Blocks
  • Alignbore
  • Resurfacing     
  • Counterbores     
  • Boring & sleeving cylinders   
  • R&R cam bearings    

Cranks
  • Magnaflux
  • Polish
  • Grind
  • Flywheel Surfacing
  • Flywheels
  • Flywheel housings
Connecting Rods
  • Resize
  • Rebush
  • Rebore

Heads
  • Pressure test     
  • Valve job     
  • R&R inj tubes    
  • Resurfacing     
  • Complete rebuild
Marini Diesel Inc. was started in 1969 by Ray Marini and has been family owned and operated for the last 45 years.   
We are located at 7740 DAHLIA ST., COMMERCE CITY, CO. 80022.