Remanufactured International MaxxForce 13 12.4L (758 ci) Engine
2008–2016 — 410–475 hp | 1,450–1,700 lb-ft
The International MaxxForce 13 is a 12.4-liter inline-six heavy-duty diesel engine designed for Class 8 over-the-road and vocational applications. Manufactured by Navistar, the MaxxForce 13 was introd...
Starting from $8,000 – $14,000 — 1-Year Unlimited Mileage Warranty
International MaxxForce 13 Technical Specifications
About the International MaxxForce 13 Engine
The International MaxxForce 13 is a 12.4-liter inline-six heavy-duty diesel engine designed for Class 8 over-the-road and vocational applications. Manufactured by Navistar, the MaxxForce 13 was introduced in 2008 as Navistar's flagship heavy-duty engine, competing directly with the Cummins ISX and Detroit DD15 in the long-haul trucking segment. The engine features a high-pressure common rail fuel system operating at up to 29,000 PSI and a dual-stage turbocharger system for maximum power and efficiency. Like other MaxxForce engines, the MF13 was initially designed with Navistar's EGR-only emissions strategy for EPA 2010 compliance. This approach proved particularly challenging at the heavy-duty level, where higher heat loads and duty cycles put extreme stress on the EGR system. Navistar eventually added SCR aftertreatment to the MaxxForce 13 in 2013, significantly improving reliability and reducing EGR-related issues. Despite the early emissions challenges, the MaxxForce 13's core engine architecture is robust and capable, delivering competitive power and torque for heavy-duty applications. The engine was replaced by the Navistar N13 in 2016, which uses a Cummins-based platform.
International MaxxForce 13 Strengths
- 12.4L displacement provides strong power output competitive with 13L and 15L class engines
- Dual-stage turbo system delivers excellent boost response and high-altitude performance
- 29,000 PSI common rail fuel system for precise fuel metering and clean combustion
- Competitive horsepower and torque ratings for Class 8 applications
- 2013+ models with SCR are significantly more reliable than earlier EGR-only versions
- Lower purchase price compared to Cummins ISX and Detroit DD15 — excellent value proposition
Common International MaxxForce 13 Issues (Addressed in Our Remanufactured Engines)
- EGR system failures on 2008–2012 models — the most significant reliability concern
- EGR cooler cracking and coolant leaks into the intake manifold
- Turbocharger failures related to excessive soot loading from high EGR rates
- DPF regeneration issues and excessive backpressure on EGR-only models
- Oil dilution from post-injection fuel during DPF active regeneration
- Cylinder liner pitting on some early models due to coolant contamination
- ECM software issues requiring dealer reflash for drivability complaints
Vehicles with the International MaxxForce 13
Available International MaxxForce 13 Remanufactured Engines
International MaxxForce 13 Buying Guide
When purchasing a remanufactured MaxxForce 13, the model year is critical. 2013 and later models with SCR aftertreatment are dramatically more reliable than earlier EGR-only versions. A quality remanufactured MF13 should include new or rebuilt injectors, rebuilt dual-stage turbocharger, updated EGR components (if applicable), new cylinder liners and pistons, and all new bearings. Verify the emissions certification — 2013+ SCR models are strongly preferred. The MaxxForce 13 offers excellent value compared to Cummins ISX and Detroit DD15, especially for owner-operators looking for a capable Class 8 engine at a lower price point. Confirm the horsepower rating matches your application.
Frequently Asked Questions — International MaxxForce 13
How much does a remanufactured MaxxForce 13 engine cost?
A remanufactured International MaxxForce 13 12.4L engine typically costs between $8,000 and $14,000 depending on the model year and emissions configuration. 2013+ models with SCR are generally more expensive but significantly more reliable. At US Engine Production, all MaxxForce 13 engines are fully tested and backed by our comprehensive warranty. Call (631) 991-7700 for an exact quote.
Is the MaxxForce 13 a reliable engine?
The MaxxForce 13's reliability depends heavily on the model year. Early 2008–2012 EGR-only models had well-documented reliability issues, particularly with the EGR system and DPF regeneration. However, 2013+ models with SCR aftertreatment are significantly more reliable and competitive with other Class 8 engines. The core engine architecture is robust — the issues were primarily related to the emissions strategy.
What are common MaxxForce 13 problems?
The most common MaxxForce 13 problems include EGR system failures (cooler cracking, valve sticking), turbocharger failures from soot loading, DPF regeneration issues, oil dilution, and cylinder liner pitting on early models. These issues are most prevalent on 2008–2012 EGR-only models. Our remanufactured engines address all known issues with updated components.
What trucks use the MaxxForce 13 engine?
The MaxxForce 13 is used in International ProStar, ProStar+, LoneStar, TranStar 8600, PayStar 5900, and WorkStar 7600/7700. It is exclusive to Navistar/International Class 8 trucks.
What replaced the MaxxForce 13?
The MaxxForce 13 was replaced by the Navistar N13 in 2016. The N13 is based on a Cummins engine platform (derived from the ISX/X15) and represents Navistar's shift away from proprietary engine designs. The N13 offers improved reliability and parts availability through the Cummins service network.
How does the MaxxForce 13 compare to the Cummins ISX?
The MaxxForce 13 (12.4L) is slightly smaller than the Cummins ISX (15L) but offers competitive power ratings. The ISX has a stronger reputation for reliability and a larger service network. However, the MaxxForce 13 (especially 2013+ SCR models) offers excellent value at a lower purchase price. For a remanufactured engine, the MF13 is a cost-effective alternative to the ISX.