CAT C15 6NZ 550HP Rebuilt Diesel Engine 2026 – New Head – Warranty – Video for Sale

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CAT C15 6NZ 550HP Rebuilt Diesel Engine 2026 – New Head – Warranty – Video For Sale

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CAT C15 6NZ 550HP Rebuilt Diesel Engine 2026 – New Head – Warranty – Video:
$41000.00

Caterpillar C15 6NZ 550 HP Rebuilt Diesel Engine

Professionally rebuilt Caterpillar C15 6NZ diesel engine rated at 550 HP. This engine has undergone an extensive rebuild using new internal and external components and will be inspected and tested prior to sale.

The engine includes a new cylinder head, in-frame overhaul kit, new camshaft, new injectors, oil pump, manifold, and additional rebuild components.

🔧 Engine Specifications

Manufacturer: Caterpillar
Model: C15
Serial Prefix: 6NZ
Displacement: 15.2L
Configuration: Inline 6-Cylinder
Horsepower: 550 HP
Condition: Rebuilt
Turbocharged: Yes
ECM: Included, if shown with engine
Running Video: Available

🔩 Rebuild Details

This C15 6NZ has received extensive machine work and replacement components, including:

New Cylinder Head
Block Machined / Decked
New In-Frame Overhaul Kit
New Pistons
New Liners
New Piston Rings
New Main & Rod Bearings
New Camshaft
New Injectors
Oil Pump
Manifold
New Gaskets & Seals
Additional internal components inspected and replaced as required
Engine professionally assembled and prepared for testing

🔍 Condition & Testing

This engine is being sold as a REBUILT engine, not a used takeout.

Before shipment, the engine will be:

Tested • Inspected • Cleaned • Painted • Prepared for Shipping

A running video will be available so the buyer can review engine operation before shipment.

🛡️ 6-Month Limited Warranty

This rebuilt engine includes a 6-month limited warranty.

Warranty coverage applies to specified covered components and is parts only – labor is not included.

A written warranty agreement outlining all coverage, requirements, limitations and exclusions will be provided and must be signed by the customer.

🎥 Running Video Available

Running video available upon request.

Video can be provided before shipment to demonstrate engine operation.

🚚 Nationwide Shipping

Nationwide freight shipping available.

Engine will be secured to a custom-built pallet, wrapped and properly prepared for transportation.

Preparation time: At least 7 business days.

Shipping costs will be quoted at the time of shipment, as freight rates may change weekly.

⚠️ Important

Buyer is responsible for verifying that the Caterpillar C15 6NZ configuration, horsepower, ECM calibration and accessories are compatible with their truck.

Engine serial number and additional specifications can be provided upon request.

Sold as pictured.

We are Optimum Truck Parts.
We Sell Surplus, New, Used, Reman & Rebuilt DieselEngines!

✓ Fully Tested • Warranty Available • Nationwide Freight OPTIMUM TRUCK PARTS Optimum Truck Parts is a professional diesel engine supplier focused on quality, transparency, and fast service. Engines are inspected and prepared prior to shipment and shipped promptly. Photos in this listing may be representative of similar inventory. Before purchase, we can provide current photos/video and confirm key details (Serial/ESN, rating, configuration) when available. Listing price is per engine. RUN-TEST & QUALITY ASSURANCE Every used engine is evaluated prior to shipment and sold in good running condition. Run-test video may be available upon request. During testing we evaluate:

Compression
Oil & cooling system leaks
Audible concerns (knocking/ticking)
Metal residue check (best-effort)
Smoking / blow-by

SHIPPING We ship nationwide and typically dispatch shortly after payment. We can help coordinate freight and each shipment is insured when applicable. Shipping cost varies by destination—message us for an accurate quote. Quick Notes

Fast response through messages
Written warranty included (when stated)
We can share current photos/video when available

IMPORTANT NOTES

We sell locally as well and may end a listing if the item sells off-.
Pricing may vary by availability, miles, year, HP, condition, and model.
Some information may be best-effort when sourced from third parties (tags, ECM data, sale records, etc.).
Please message us for a formal shipping quote before checkout.

BRANDS WE CARRY Caterpillar • Cummins • Detroit • Mercedes-Benz • Volvo • Mack • International • Perkins • Navistar • MaxxForce Looking for a specific CPL, serial/ESN, or rating? Message us—we’ll help match the right unit and share current photos/video when available. YouTube Channel Watch engine run-test videos and customer shipments on our YouTube channel.
Search on YouTube: “Optimum Truck Parts” Watch Our Engine Videos ▶ Visit Our YouTube Channel Shipping We ship nationwide and handle freight arrangements. All shipments are insured. Contact us for an accurate shipping quote.