Engine Rebuild Parts & DT817 Support

Published: July 16, 2026  |  By FP Smith Parts & Equipment

Strong support for International Harvester DT817 family engines and a wide range of rebuild components — physically stocked and ready to ship.

A reliable diesel engine is the heart of any heavy equipment or industrial machine. When that engine needs attention, having access to quality rebuild parts — and the knowledge to use them correctly — makes the difference between costly downtime and a successful repair. At FP Smith Parts & Equipment, we specialize in engine rebuild components with a particular strength in International Harvester DT817 series engines and related powerplants.

With 79 years of family-owned expertise since 1947, we maintain one of the largest physical inventories of engine rebuild parts on the West Coast at our 20-acre facility in Fairfield, California. We stock new OEM surplus, quality used, and reconditioned components so customers can complete rebuilds efficiently and cost-effectively.

Why Engine Rebuild Parts Matter

Many machines still in daily service — especially older Dresser, International Harvester, and related equipment — rely on proven diesel engines that are no longer in current production. New complete engines can be expensive or difficult to source. A properly executed rebuild using quality parts often restores performance and reliability at a fraction of the cost of replacement.

FP Smith supports this practical approach by stocking the individual components rebuilders and repair shops need most.

Strong Support for the DT817 Family

The International Harvester DT817 (and its variants DT817B, DT817C, DTI817B, and DTI817C) remains one of the most important engines we support. These engines powered a wide range of construction, industrial, and agricultural equipment and are still found in service today.

We stock a wide selection of DT817-related components, including:

• Main and rod bearings
• Gasket sets and individual gaskets
• Pistons, sleeves, and piston ring sets
• Crankshafts and related hardware
• Cylinder heads and valve train components
• Water pumps, oil pumps, and cooling system parts
• Other high-wear and service items commonly needed during overhauls

Our inventory and experience with these engines allow us to help customers identify the correct parts for specific serial numbers and applications.

Broader Engine Rebuild Inventory

In addition to the DT817 family, we support engine rebuild needs across multiple brands and models commonly found in heavy equipment:

• International Harvester / Navistar diesels
• Cummins engines
• Caterpillar engine components
• Komatsu engine support parts
• Other popular industrial and construction diesels

Typical components available include:

Bottom End

Main bearings, rod bearings, thrust washers, crankshafts, and related hardware.

Top End

Cylinder heads, valves, valve guides, springs, and gasket sets.

Cylinder Components

Pistons, sleeves/liners, piston rings, and connecting rods.

Cooling & Lubrication

Water pumps, oil pumps, oil coolers, thermostats, and related seals and gaskets.

Fuel & Air Systems Support

Selected components and related service parts depending on application.

The FP Smith Advantage for Engine Rebuilds

• Physical inventory — Parts are stocked on-site, not just drop-shipped
• 79 years of continuous expertise — Deep knowledge of older and current engines still in use
• Flexible options — New OEM surplus, quality used, and reconditioned components
• Rebuild shop support — We supply parts to our own rebuild center and to outside shops
• Same-day shipping — Available on most orders placed before 3 PM PST
• Technical assistance — Help matching parts to specific engines and applications

Whether you are a professional rebuilder, a repair shop, or an equipment owner performing your own overhaul, we aim to supply the right components the first time.

Common Engine Rebuild Scenarios We Support

• Complete in-frame or out-of-frame overhauls
• Bearing and gasket kit replacements
• Piston and sleeve replacements after wear or failure
• Cylinder head work
• Supporting parts for DT817 and related IH engines still powering working machines
• Mixed-brand fleets that include both current and legacy powerplants

Whether you need a complete gasket and bearing kit for a DT817 or individual components for another engine, our team is ready to help. Same-day shipping on most orders placed before 3 PM PST. Expert help available Monday–Friday.