International / Navistar Diesel Engines
Buyer’s Guide, Specs & Inventory
From the shop-favorite DT466 and vocational DT530/DT570 to emissions-era
MaxxForce DT and MaxxForce 13, International® engines cover school bus, medium-duty,
and regional vocational work. This hub explains HEUI vs. later fuel systems, emissions phases (EGR, DPF/DEF),
and the fitment checks to do before you buy—then lets you jump straight into live International inventory.
Why International Engines?
The DT466 is legendary for durability and serviceability in school bus and medium-duty fleets. Larger
DT530/DT570 variants add torque for vocational bodies. Emissions-era MaxxForce engines
brought EGR and aftertreatment—good power and packaging, but you’ll want to verify emissions hardware condition up front.
Matching the engine family and emissions phase to your chassis is the key to a smooth swap.
- 1
Platform & fuel system: DT466/530/570 use HEUI in common years—simple to service with the right high-pressure oil checks. Later MaxxForce platforms add advanced injection and EGR/DPF.
- 2
Emissions era: Pre-EGR vs. EGR vs. DPF/DEF affects turbo routing, coolers, sensors, and aftertreatment packaging. Confirm the engine’s emissions label matches your local rules.
- 3
Fitment details: Verify front structure, fan hub spacing, belt routing, mounts, harness connectors, and flywheel housing pattern for your chassis.
Popular International Engine Families
DT466
DT530
DT570
MaxxForce DT
MaxxForce 13
DT466 is a go-to for medium-duty fleets due to strong bottom-end and wide parts availability.
DT530/DT570 step up displacement for heavier vocational loads. MaxxForce DT modernizes
the DT architecture with emissions gear; MaxxForce 13 targets higher power regional haul.
Choose by GVW, terrain, and emissions requirements.
International DT466 — At a Glance
The DT466 is famous for long service life, straightforward diagnostics, and strong low-rpm torque.
You’ll see it across school buses, box trucks, and vocational builds. Earlier non-emissions variants are simpler;
later DT466E/MaxxForce DT add electronics and emissions. Selecting the right era for your chassis and state rules is critical.
- 1
Common HP: ~210–300+ HP depending on calibration and era.
- 2
HEUI checks: High-pressure oil system health (IPR/ICP, oil leaks, injector O-rings) drives cold starts and idle quality.
- 3
Harness/ECM: Connector styles and ECM strategies vary—match to your truck to avoid rewire time.
MaxxForce DT / MaxxForce 13 — Fit & Use Cases
MaxxForce DT suits medium-duty vocational routes where packaging and drivability matter.
MaxxForce 13 targets higher-power regional haul and heavier service. Both use modern electronics and
aftertreatment—so verify DPF history, dosing, and cooler integrity to avoid surprises post-install.
- 1
MaxxForce DT: Great for school bus and medium-duty bodies; confirm EGR cooler updates and aftertreatment status.
- 2
MaxxForce 13: More displacement and torque for grades and heavier loads; check DOC/DPF service records.
- 3
Electronics: Ensure harness/connectors and sensor families align with your chassis’ year and dash integration.
Pre-Buy Checklist (Used/Reman/Surplus)
- 1
VIN / serial & ECM data: Confirm rating, emissions label, and software family match your chassis.
- 2
Aftertreatment: Review DPF service, differential pressure, regen history, and current fault codes.
- 3
Turbo / CAC: Endplay and spin checks; pressure-test charge air for full boost after install.
- 4
Oil/fuel analysis: Rule out coolant intrusion and fuel dilution; watch wear metals.
- 5
Fitment: Verify mounts, fan spacing, accessory locations, and flywheel housing pattern.
