Remanufactured International MaxxForce DT 7.6L (466 ci) Engine
2007–2015 — 210–300 hp | 520–860 lb-ft
The International MaxxForce DT is a 7.6-liter inline-six diesel engine that serves as the direct successor to the legendary DT466 — one of the most popular medium-duty diesel engines ever produced. Ma...
Starting from $6,000 – $11,000 — 1-Year Unlimited Mileage Warranty
International MaxxForce DT Technical Specifications
About the International MaxxForce DT Engine
The International MaxxForce DT is a 7.6-liter inline-six diesel engine that serves as the direct successor to the legendary DT466 — one of the most popular medium-duty diesel engines ever produced. Manufactured by Navistar, the MaxxForce DT was introduced in 2007 to meet EPA 2007 emissions standards while maintaining the durability and performance that made the DT466 an industry standard. The engine retains the DT466's proven inline-six architecture and 7.6L displacement but adds modern features including high-pressure common rail fuel injection (26,000 PSI), a variable geometry turbocharger, and advanced EGR cooling for emissions compliance. The MaxxForce DT was initially designed with an EGR-only emissions strategy (no SCR/DEF), which was Navistar's controversial approach to meeting EPA 2010 standards. While this strategy led to reliability concerns on some early models, the fundamental engine block and rotating assembly remain as durable as the DT466 it replaced. Later production models (2013+) added SCR aftertreatment for improved emissions compliance and reduced EGR duty cycles. The MaxxForce DT is the workhorse of the medium-duty segment, powering everything from school buses to dump trucks to regional delivery vehicles.
International MaxxForce DT Strengths
- Built on the legendary DT466 platform — proven inline-six architecture with decades of field history
- 7.6L displacement provides excellent low-end torque for vocational and stop-and-go applications
- High-pressure common rail fuel system delivers precise fuel metering and clean combustion
- Variable geometry turbo provides strong boost response across the entire RPM range
- Extremely wide application range — fits everything from school buses to heavy vocational trucks
- Massive aftermarket and service network — every International dealer services this engine
- Cast-iron block and head construction provides exceptional durability in harsh conditions
Common International MaxxForce DT Issues (Addressed in Our Remanufactured Engines)
- EGR cooler failures on 2007–2012 models can cause coolant leaks into the intake manifold
- EGR valve carbon buildup leads to stuck valves and reduced engine performance
- DPF regeneration issues including failed regen cycles and excessive backpressure
- Oil dilution from post-injection fuel during DPF active regeneration
- Turbo actuator and VGT vane sticking from soot contamination
- Injector failures on high-mileage engines cause rough idle and increased emissions
- Exhaust backpressure sensor failures trigger false DPF codes
Vehicles with the International MaxxForce DT
Available International MaxxForce DT Remanufactured Engines
International MaxxForce DT Buying Guide
When purchasing a remanufactured MaxxForce DT, prioritize later model years (2013+) with SCR aftertreatment — these engines have lower EGR duty cycles and are significantly more reliable. A quality remanufactured MaxxForce DT should include new or rebuilt injectors, a rebuilt turbocharger with new VGT actuator, updated EGR cooler (single-piece design), new head gaskets, and all new bearings. The MaxxForce DT is essentially a modernized DT466, so the core engine is extremely durable. The key is ensuring the emissions components (EGR, DPF, turbo) are properly rebuilt with updated parts. Verify the horsepower rating — the DT comes in a wide range from 210 to 300 hp depending on the application.
Frequently Asked Questions — International MaxxForce DT
How much does a remanufactured MaxxForce DT engine cost?
A remanufactured International MaxxForce DT 7.6L engine typically costs between $6,000 and $11,000 depending on the model year, horsepower rating, and emissions configuration. Later models with SCR are generally more expensive but more reliable. At US Engine Production, all MaxxForce DT engines are fully tested and backed by our comprehensive warranty. Call (631) 991-7700 for an exact quote.
Is the MaxxForce DT the same as the DT466?
The MaxxForce DT is the direct successor to the DT466 and shares the same basic 7.6L inline-six architecture. However, the MaxxForce DT features modern high-pressure common rail fuel injection, a variable geometry turbocharger, and EGR/DPF emissions systems that the DT466 did not have. The core engine block and rotating assembly are very similar, but the fuel system and emissions components are completely different.
What are common MaxxForce DT problems?
The most common MaxxForce DT problems include EGR cooler failures (especially on 2007–2012 models), EGR valve carbon buildup, DPF regeneration issues, oil dilution, and turbo actuator failures. These issues are primarily related to the emissions system, not the core engine. Our remanufactured engines address all known issues with updated components.
What trucks use the MaxxForce DT engine?
The MaxxForce DT is used in International DuraStar 4300/4400, WorkStar 7300/7400/7500, PayStar 5500, TranStar 8500/8600, ProStar day cab, and IC Bus CE Series school buses. It is one of the most versatile medium-duty engines available.
Should I buy a MaxxForce DT or a DT466?
If you can find a DT466 (pre-2007), it will be simpler and more reliable due to the lack of emissions equipment. However, the MaxxForce DT (especially 2013+ with SCR) is a capable engine with better fuel economy and power. For a remanufactured engine, the MaxxForce DT offers more modern performance while the DT466 offers simplicity. Both are excellent choices.
How many miles can a MaxxForce DT last?
A well-maintained MaxxForce DT can last 300,000 to 500,000 miles before requiring a major overhaul. The core engine (block, crank, rods) is extremely durable — the same proven DT466 architecture. Key maintenance items include regular oil changes, EGR system cleaning, DPF service, and coolant system maintenance to prevent EGR cooler issues.