Caterpillar D399 V12 Diesel Engine Core

CaterpillarModel:D399
Longmont, Colorado
Diesel Engine
Qty:1
Condition: New
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E&M Equipment
E&M Equipment

Seller since: Apr 2026

At a glance

Product
Caterpillar D399 V12 Diesel Engine Core
Manufacturer
Caterpillar
Model
D399
Category
Diesel Engine
Condition
NEW
Availability
In stock
Price or process
Make an offer
Quantity
1
Lead time
Not provided
Location
Longmont, Colorado
Fulfillment
Pickup and shipping available
Listed on

Key specifications

Aspiration
Turbocharged
Bore
8.5in
Displacement
3971cc
Flywheel Housing
SAE #00
Number of Cylinders
12
Rated Power
575kW
Rated Speed
1200RPM
Stroke
10in

Supporting evidence

No supporting documents or certifications provided.

Description

The Caterpillar D399 is a robust V12 diesel engine core designed for heavy-duty industrial applications including power generation, oilfield pumps, marine propulsion, and locomotives. This used core, marked with unit identifier '12' and prefix 'UC1644', features a 65-liter displacement, turbocharged aspiration, and proven durability from Caterpillar's classic PC series. Benefits include exceptional reliability in harsh environments, high power output up to 575 hp at 1200 rpm, and cost-effective rebuilding potential compared to new engines. Drawbacks of used cores include potential wear requiring inspection, but advantages over competitors like GM or Cummins equivalents lie in Caterpillar's superior parts availability and service network. Ideal for rebuilders seeking a high-performance base with SAE #00 flywheel housing compatibility. Condition appears good for a core—externally dusty from storage but structurally intact with manifolds, heads, and turbo housing present. No visible major damage in provided images.

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Shipping Information

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Return Window
No returns accepted
Return Conditions
This equipment is sold as-is, where-is
Refund Policy
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