Remanufactured CAT 3500 and C175 Engines Built for Long-Term Reliability

Independent Rebuild Specialist serves mining, oil and gas, and industrial customers to get critical engines back to work with confidence.

Reliability That Keeps Critical Equipment Working

Message From the Founder

When I started Independent Rebuild Specialist in 1999, the goal was not to be the biggest general diesel shop. The goal was to build engines customers could trust in the field.

That focus shaped who we became. We narrowed our work to high-horsepower CAT platforms and built our company around remanufactured CAT 3500 and CAT C175 engines for ultra-class mining trucks, oil and gas applications, and industrial operations where downtime is expensive and premature failure is not acceptable.

Today, we control the rebuild process from our 40,000 sq. ft. facility, with teardown, inspection, machining, assembly, painting, documentation, and testing handled through one accountable system. We also maintain more than 140 CAT mining engine cores, operate field service trucks in mine environments, and provide 24/7 support for the engines we build.

That level of specialization matters. It helps us protect quality, reduce unnecessary handoffs, respond faster when customers need support, and deliver remanufactured CAT engines with the reliability critical operations depend on.

Chris Evans
President, Independent Rebuild Specialist

Built Around the Engines Your Operation Depends On

Support From People Who Understand the Stakes

Work directly with experienced decision-makers who understand your engine, your timeline, and the consequences of any downtime.

CAT Engines Available When Timing Matters

Our large inventory of CAT 3500 and C175 engines helps customers respond to planned rebuilds, long lead times, and urgent replacement needs.

Support Beyond the Shop Floor

Our team provides field service, installation support, and practical help after delivery so your engine returns to work with confidence.

Built for Demanding Operations Where Uptime Matters

From mine sites to oilfields to industrial facilities, our customers depend on CAT 3500 and CAT C175 engines they can trust to keep critical equipment working. Our rebuild process is built for customers who need reliability, documentation, and accountability when downtime is not an option.

Mining

Support for ultra-class mining fleets where engine reliability, planned rebuilds, and fast response help protect production schedules.

Oil & Gas

Reliable CAT engine rebuilds for oil and gas operations where equipment availability, field support, and turnaround time directly impact production.

Industrial

High-horsepower CAT engine rebuild solutions for industrial applications that require dependable performance, controlled workmanship, and long-term support.

With over 20 years of experience, Independent Rebuild Specialist is a global leader in high-quality reconditioned Caterpillar diesel engines for heavy equipment and industrial applications. Specializing in medium to high horsepower models, our skilled technicians bring decades of hands-on expertise to every build, operating a full-service machine shop where engines are completely disassembled, cleaned, rebuilt to exact specifications, and Dyno tested before shipping. We invest in the latest technology to ensure top tier quality and performance and offer a vast inventory of remanufactured CAT engines. If we don’t have it, we will build it.

27

Years In Business

140+

CAT Engine Cores

6

Continents Served

Our Inventory

Rebuild Support Designed Around Your Operation

When high-horsepower engines power your most critical equipment, every step of the rebuild process matters. At Independent Rebuild Specialist, we provide a fully managed rebuild experience with complete accountability—from initial evaluation through final commissioning. By controlling every stage of the process, we deliver consistent quality, clear communication, and dependable support that helps maximize engine reliability while minimizing downtime.

Define the Scope

Every rebuild begins with an evaluation of your engine, application, environment, and objectives. With your team, we establish the rebuild scope, timeline, and priorities to ensure the project aligns with your requirements.

Control the Rebuild

We manage the entire rebuild in-house: teardown, inspection, machining, assembly, testing, painting, documentation, and final preparation. Complete control allows us to deliver consistent, quality results.

Coordinate Delivery

We oversee the logistics from pickup through final delivery, helping streamline transportation, reduce unnecessary handoffs, and provide clear communication throughout the project so you always know the status of your engine.

Support the Field

Our commitment continues after delivery. We provide commissioning assistance, installation support, technical troubleshooting, and responsive field service so your engine returns to service safely and efficiently.

How Much is Downtime Is Really Costing You?

The cost of an engine failure is not limited to the repair. Lost production, delayed schedules, repair costs, and multiple engines out of service can quickly turn a mechanical issue into a much larger operational problem. Use the calculator below to estimate the true cost of downtime for your fleet.

Engines Down

Number Of Engines Out Of Service

1 10

Downtime Per Engine

Hours Of Repair For Each Engine

8 72

Hourly Revenue Loss

Lost revenue each hour an engine is down.

$5k $25k

Repair Costs

Per Engine, Not Covered By Warranty

$25k $500k

Total cost of downtime

Make More Confident CAT Engine Rebuild Decisions

Before you commit to a rebuild partner, it helps to understand what separates a controlled, well-documented rebuild from a risky one. Explore practical articles on CAT 3500 and CAT C175 engines, rebuild quality, downtime, dyno testing, OEM parts, and the support that matters after delivery.

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Get Updates From Our Team

Frequently Asked Questions

What makes Independent Rebuild Specialist different from a dealer or general diesel rebuilder?

We are not a general diesel repair shop or broad-line equipment rebuilder. We specialize in CAT 3500 and C175 engines and focus on providing a controlled rebuild process, direct accountability, detailed documentation, and practical support for customers who cannot afford premature failure.

What types of engines does Independent Rebuild Specialist remanufacture?

Independent Rebuild Specialist specializes in remanufactured CAT 3500 and C175 engines for demanding mining, oil and gas, and industrial applications. That narrow focus allows us to concentrate our people, processes, tooling, and quality controls on the engines our customers rely on in uptime-critical operations.

How does Independent Rebuild Specialist help reduce the risk of premature engine failure?

Our rebuild process is built around specialization, controlled in-house work, genuine OEM parts, documentation, and performance verification before delivery. Performing the entire rebuild at our facility reduces handoffs, improves consistency, and provides clear accountability for the work performed.

Do you use genuine OEM parts in your remanufactured engines?

Yes. We use genuine OEM parts rather than aftermarket components as part of our commitment to rebuild quality and long-term reliability. A remanufactured engine is only as dependable as the components used to build it, which is why we rely on proven OEM parts instead of lower-cost aftermarket alternatives.

Do you have remanufactured engines available for urgent replacement needs?

We maintain a large inventory of cores and ready-to-ship rebuilt engines to give customers more options when availability matters. Current availability varies by engine model and arrangement, so customers should contact us to discuss their specific requirements and timeline.

Do you provide support after a remanufactured engine has been delivered?

Yes. Depending on the customer, location, and program, support can include installation assistance, commissioning, troubleshooting, maintenance support, and warranty-related service. Our goal is to provide a direct path to resolution if an issue occurs after delivery.

How do I get pricing or check availability for a CAT 3500 or C175 engine?

Contact our team with the engine model, arrangement or serial number if available, application, location, and desired timeline. That information helps us determine the most appropriate engine option, current availability, and next steps.