The Ultimate Guide to the International LT625 (2018–2020 Models)Complete Guide to the International LT625 (2018–2020)
2020 international lt625
Introduction
The International LT625 is one of the most recognized heavy-duty trucks in the Class 8 segment, built by Navistar International Corporation. Introduced as part of the LT Series in 2017, the LT625 quickly became a favorite among long-haul fleets due to its fuel-efficient design, improved aerodynamics, advanced safety features, and driver comfort. Between 2018 and 2020, the LT625 saw continuous refinement, with improvements to emissions systems, software, and reliability.
This article provides a year-by-year breakdown of the 2018, 2019, and 2020 International LT625 models, highlights common mechanical issues like EGR cooler failure, provides guidance on EGR cooler swaps, and offers real-world owner reviews and resale market insights.
What Is the International LT625?
The International LT625 is a Class 8 on-highway tractor, part of the company’s LT Series (short for “Linehaul Tractor”). It was developed to replace the older ProStar line, boasting better aerodynamics, reduced fuel consumption, and a modernized cab design.
Key Features Across All LT625 Models (2018–2020):
- Engine Options:
- Cummins X15 (15-liter, up to 605 HP)
- Navistar A26 (12.4-liter, up to 475 HP)
- Transmissions:
- Eaton Fuller 10/13/18-speed manuals
- Automated Manual Transmissions (AMTs), including Eaton Ultrashift and Endurant
- Sleeper Options:
- 56”, 73”, and 76” sleepers
- Aerodynamic Enhancements:
- Sloped hoods, integrated bumper designs, optional skirts
- Fuel Economy:
- Up to 9–10 MPG under optimized conditions with the A26 engine
2018 International LT625
Overview
The 2018 model marked the LT625’s second full year of production. It introduced minor software updates, bug fixes to earlier issues in the emissions system, and improved cab insulation for better climate control.
Engine and Transmission
- Most 2018 LT625s were powered by the Navistar A26 engine, a 12.4L diesel designed in partnership with MAN engines.
- The Cummins X15 was available as an option, particularly for fleets demanding higher horsepower.
- Both manual and automated transmissions were common.
Common Issues in 2018 LT625
- EGR System Failures were frequently reported—especially EGR cooler leaks or clogging.
- DPF (Diesel Particulate Filter) clogging and DEF system malfunctions
- Minor electrical glitches with display clusters and sensor feedback
2018 International LT625 EGR Cooler Swap
Why It’s Done
The EGR (Exhaust Gas Recirculation) cooler plays a critical role in emissions reduction. In the 2018 LT625, particularly those with the A26 engine, EGR coolers were known to leak internally, causing coolant loss, white smoke, overheating, and engine performance drops.
Symptoms of a Bad EGR Cooler:
- Loss of coolant with no external leak
- Excessive white smoke
- Engine overheating
- Check engine light with fault codes (e.g., EGR temp too high)
Swap Procedure (Simplified Overview)
- Drain Coolant: Remove coolant from the system to prevent spillage.
- Disconnect Components: Intake, sensors, EGR valve, and coolant lines.
- Remove Old EGR Cooler: Mounted behind the intake manifold—typically takes 3–6 hours.
- Clean Surfaces and Lines: Ensure no contamination.
- Install New Cooler: Reconnect all hoses, clamps, and electrical connectors.
- Refill and Bleed Coolant: Ensure no air locks in the cooling system.
- Test for Leaks: Run engine, monitor for error codes and leaks.
Tools Needed:
- Basic hand tools
- Torque wrench
- Coolant vacuum filler
- Fault code reader/diagnostic scanner
Cost Estimate (Shop vs. DIY):
| Option | Approximate Cost |
|---|---|
| OEM EGR Cooler | $800–$1,200 |
| Labor (Shop) | $600–$1,000 |
| Total Shop Cost | $1,500–$2,200 |
| DIY Cost | $800–$1,200 (Parts only) |
Fleet operators often keep spare coolers or work with a rebuild shop due to the frequency of failures in early A26 units.
2019 International LT625
Upgrades and Features
The 2019 LT625 was refined based on early customer feedback. Key improvements included:
- Revised EGR and DEF system software, reducing false alarms and check engine lights
- Improved wiring harnesses for better reliability in harsh climates
- Quieter cab with improved door seals and insulation
- Optional digital dash cluster
Engine Performance
- The A26 engine now came with standard 3-year/300,000-mile warranty, signaling Navistar’s increased confidence.
- Fuel efficiency was reported as 7.5–8.5 MPG under load with proper spec’ing.
Common Issues
- Fewer EGR cooler failures compared to 2018, though still present
- DEF sensors and nox sensor malfunctions
- Some AMT software required dealer updates
2020 International LT625
The Most Refined of the First Generation
By 2020, the LT625 had matured into a highly reliable platform. Navistar made updates aimed at both owner-operators and fleets.
New Highlights:
- Remote Diagnostics 360 became standard, allowing fleet managers to monitor trucks in real time
- A26 engines improved with better injector design and fuel mapping
- HVAC system was upgraded with better airflow and reduced power draw
- New driver seat options with memory foam and heating
Reliability and Performance
- The EGR system was significantly more robust in 2020
- Average MPG continued to climb with SmartAdvantage Powertrains
- Cummins X15 remained the top choice for power users, especially on long-haul, hilly routes
Driver and Fleet Reviews (2018–2020)
Driver Feedback:
- Pros:
- Quiet, comfortable cab
- Good visibility and mirror setup
- Fuel efficiency with A26 engine
- Aerodynamic handling
- Cons:
- Early EGR issues (especially in 2018)
- DEF system sensitive to impurities
- Limited cabin storage compared to some competitors
Fleet Manager Feedback:
- Fleet diagnostics tools are effective in keeping trucks on the road
- Parts availability is decent, but A26-specific parts are harder to source than Cummins
- Cost of ownership is lower than some competitors over 500k miles
- Resale value is stable if service records are clean and EGR issues addressed
Resale and Market Trends
As of mid-2025, used LT625 tractors retain value well, especially post-2019 models. Here’s a general breakdown of resale prices:
| Model Year | Mileage Range | Estimated Price |
|---|---|---|
| 2018 LT625 | 500k–700k miles | $35,000 – $45,000 |
| 2019 LT625 | 400k–600k miles | $40,000 – $50,000 |
| 2020 LT625 | 300k–500k miles | $48,000 – $58,000 |
Prices are influenced by engine type (Cummins-equipped models cost more), sleeper configuration, and whether EGR or DEF system work has been done.
LT625 vs. Competitors (Freightliner Cascadia, Volvo VNL)
| Feature | LT625 | Cascadia | Volvo VNL |
|---|---|---|---|
| Engine Options | A26, Cummins X15 | Detroit DD13/DD15 | D13, Cummins X15 |
| Reliability (Post-2020) | High | Very High | High |
| Aerodynamics | Excellent | Best-in-class | Very Good |
| Interior Comfort | Moderate to High | High | High |
| Maintenance Costs | Moderate | Low to Moderate | Moderate |
| Fuel Economy | 8–10 MPG (A26) | 9–10 MPG (DD15) | 8–9 MPG (D13) |
| Resale Value | Steady | Very High | High |
Conclusion
The International LT625 from 2018 to 2020 represents a modern, efficient, and driver-focused Class 8 truck. While early models like the 2018 LT625 had notable issues—particularly with EGR coolers, DEF systems, and minor electrical faults—many of these were resolved by 2020. The 2019 and 2020 LT625 versions are widely regarded as reliable, comfortable, and fuel-efficient.
Whether you’re considering purchasing a used LT625, performing an EGR cooler swap, or comparing it to other brands, this platform offers solid performance and long-term value when maintained properly.
If you’re a fleet owner, owner-operator, or technician working with this series, the LT625 continues to be a smart choice when you value fuel economy, long-haul comfort, and serviceability. blogvista.co.uk
