Expert Diesel
When It Counts.
Heavy diesel engines, commercial fleets, and heavy equipment — kept running with fast, reliable service from our Carp, Ontario shop or at your location.
Complete Diesel Services
From diagnostics to drivetrain — every aspect of heavy diesel repair and maintenance, in our shop or at your location.
Diesel Engine Repair
Full diagnostics, overhaul, and repair on Cummins, Detroit, CAT, Paccar, MACK and more.
Fleet Maintenance
Customized PM programs and multi-unit contracts to keep your fleet on the road year-round.
Commercial Truck Repair
Heavy-duty repair from brakes and suspension to complete engine work, Class 5 through 8.
Preventive Maintenance
Oil changes, filter service, fluid analysis, and scheduled inspections on your schedule.
Hydraulic Systems
Pump, cylinder, hose, and system repair for trucks, trailers, and heavy equipment.
Electrical Diagnostics
Advanced wiring, ECM diagnostics, and electrical fault-finding with professional scan tools.
Transmission & Drivetrain
Manual and automatic transmission, driveshaft, differential, and PTO service.
Mobile On-Site Service
We come to you. Mobile units across Ottawa and surrounding areas — fast response.
Heavy Equipment
Excavators, loaders, graders, and construction equipment — diesel repair on-site.
Built on Reputation.
Backed by Results.
We’re not a dealership. We’re a working diesel shop that treats your equipment the way you do — seriously. Ottawa fleet managers and owner-operators trust us because we deliver honest work, on time, at fair rates.
Certified Diesel Technicians
Red Seal and manufacturer certifications — diesel done right the first time.
Fleet Priority Scheduling
Fleet accounts get priority booking and dedicated account management.
Mobile Response Capability
Broke down on-site? Our mobile units get to you fast — no tow needed.
Transparent Pricing
We quote before we wrench — and we stick to it. No surprises, ever.
What Our Customers Say
“Scott Diesel has been maintaining our dump truck fleet for years. Always honest, never pad the bill. Our trucks are rarely off the road.”
“Their mobile service saved me thousands. Broke down 40km from the city, guy was out in 2 hours. Back running same day.”
“Switched our whole municipal fleet to Scott Diesel three years ago. Downtime dropped significantly and the reporting is excellent.”