Engines and Components Engines, Blocks and Components

Detroit Diesel

V6 Engine

$6,595.00

SKU: 6V71

In Stock
In Stock
Ships by Aug 4
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Description

The Detroit Diesel 6V71 is a robust two-stroke diesel engine from the V71 Series, recognized for its durability, efficiency, and adaptability across demanding environments. This engine configuration features a V-type cylinder arrangement with six cylinders, a bore of 4.25 inches, and a stroke of 5.0 inches, yielding a total displacement of 426 cubic inches. Its design prioritizes consistent performance with a 17:1 compression ratio, ensuring efficient combustion and optimal power delivery. A key innovation of the V71 Series is its two-stroke diesel engine design, which completes a power cycle with every crankshaft revolution. This design, coupled with a blower for air intake and exhaust scavenging, contributes to a higher power-to-weight ratio, making the engine suitable for heavy-duty applications where space and weight are critical factors. The two-stroke design also reduces the number of moving parts, enhancing reliability and simplifying maintenance requirements. Engineered for longevity, the Detroit Diesel 6V71 incorporates robust materials and a modular construction. The cylinder blocks are made of cast iron, built to withstand extreme pressures and temperatures. Replaceable wet cylinder liners improve cooling efficiency, while forged aluminum pistons offer high strength with reduced weight. This modularity extends to its components, such as pistons, cylinder liners, and injectors, which are standardized across the V71 Series, facilitating interchangeability and streamlining repairs. Furthermore, the V71 Series features efficient cooling and lubrication systems to maintain optimal operating temperatures and protect engine components. The cooling system utilizes thermostatically controlled circulation, while the lubrication system includes a high-capacity oil pump and spin-on filters. These features collectively contribute to the engine's reliability and extended operational lifespan, making it a trusted solution for industrial and marine applications.

MIA's Description

The Detroit Diesel 6V71 is a two-stroke diesel engine designed for durability and efficiency. It features a V-type cylinder arrangement with 6 cylinders, a bore of 4.25 inches, and a stroke of 5.0 inches, resulting in a displacement of 426 cubic inches.

This engine operates with a 17:1 compression ratio, utilizing a blower for air intake and exhaust scavenging. The V71 Series is known for its modular design, allowing for interchangeable components like pistons and cylinder liners, which simplifies maintenance and reduces downtime.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandDetroit Diesel
Part Number6V71
CategoryEngines and Components

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy