Detroit Diesel 6V71 & 12V71 Blower (Rebuilt) Video

March 26, 2025

Why You Should Buy Your Rebuilt Blower for the Detroit Diesel 6V71 & 12V71 from Diesel Pro Power

Blower For Detroit Diesel 6V71 & 12V71 Engines

When it comes to keeping a Detroit Diesel 6V71 or 12V71 engine running at peak performance, few components are as important as the blower. These iconic two-stroke engines rely on the Roots-style blower not as an optional performance upgrade, but as a required part of the engine’s breathing system. Without a properly functioning blower, a 71-series engine simply cannot run the way it was designed to.

That’s why choosing a high-quality rebuilt blower matters — and why Diesel Pro Power has become the go-to supplier for thousands of Detroit Diesel owners around the world. If you’re rebuilding, repowering, or maintaining a 6V71 or 12V71, here are the top reasons Diesel Pro Power should be your first choice.

A Critical Component That Must Be Done Right

On Detroit Diesel two-stroke engines, the blower is responsible for two vital functions:

Forcing fresh air into the cylinders for combustion
Scavenging out spent exhaust gases between cycles

Because these engines do not draw air naturally like a four-stroke, a worn, leaking, or out-of-tolerance blower will immediately translate into:

Hard starting
Loss of power
Poor fuel efficiency
Excessive smoke
Increased oil consumption
Higher operating temperatures
Premature engine wear or failure

This is why a rebuilt blower isn’t something to gamble on. It must be properly remanufactured to the exact specifications that Detroit Diesel intended.

Diesel Pro Power ensures that this happens every time.

Professional Rebuilding That Restores Factory Performance

A blower from Diesel Pro Power is not simply “cleaned up” or “freshened up.” Every unit undergoes a thorough teardown, inspection, and rebuild process to restore proper tolerances and airflow performance.

Each blower is:

Completely disassembled
Cleaned and inspected for wear, scoring, or rotor damage
Fitted with new wear components and seals
Checked for housing integrity and flatness
Rotor-timed to precise specifications
Reassembled and tested before leaving the facility

The result is a blower that performs like new — delivering the correct air volume, proper scavenging, and consistent power across all cylinders.

This level of detail is critical for the long-term health of any 6V71 or 12V71.

Built for Owners Who Need Reliability, Not Guesswork

Many 6V71 and 12V71 engines are still in service on:

Commercial marine vessels
Tugs and workboats
Generators
Construction equipment
Classic buses and trucks
Industrial applications

In these environments, reliability is everything. When a blower fails, the engine doesn’t just run poorly — it stops running altogether.

Diesel Pro Power understands this reality, and every rebuilt blower is prepared for customers who demand fast turnaround, consistent quality, and dependable performance in harsh or high-duty operating conditions.

Fast Shipping and Industry-Leading Availability

One of the biggest advantages Diesel Pro Power offers is speed. Blowers are stocked and ready to ship, meaning you don’t have to wait for a custom rebuild, special order, or long lead time.

For marine operators and fleet owners, minimizing downtime is a major cost factor. Diesel Pro Power’s ready-to-ship inventory means your engine gets back online faster than sourcing parts from slower or unreliable suppliers.

Diesel Pro Power also ships worldwide to over 180 countries, supporting customers wherever Detroit Diesel engines are still at work.

A Trusted Supplier With Thousands of Satisfied Customers

In the world of vintage Detroit Diesel engines, reputation matters. Diesel Pro Power has served more than 40,000 customers globally, supplying reliable parts for engines that are still powering vessels, equipment, and vehicles decades after their original build date.

Detroit owners return to Diesel Pro Power again and again because they know they’ll receive:

Consistent quality
Professional customer support
Fast shipping
Guaranteed part accuracy
A smooth, hassle-free buying experience

When you’re dealing with a legacy engine like the 6V71 or 12V71 — where parts availability and expertise can vary widely — this level of trust is invaluable.

Detroit Diesel 53 Series Blower Catalog

Detroit Diesel 71 Series Blower Catalog

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V-Series 71 Engines

Detroit Diesel 92 Series Blower Catalog

V-Series 92 Engines

Detroit Diesel 149 Series Blower Catalog

V-Series 149 Engines

What Blowers and Blower-Related Parts Do We Carry?

Diesel Pro Power isn’t just a source for complete blowers. We carry the full ecosystem of blower-related products to complete your overhaul, rebuild, or new installation — all tailored specifically to Detroit Diesel two-stroke engines.

Complete Blowers

We offer factory-style complete blowers for all the Detroit Diesel models listed above, whether inline or V configuration, turbocharged or non-turbo, 2-valve or 4-valve. Each blower is engineered or rebuilt to precise Detroit Diesel specifications, ensuring:

Correct rotor clearances for optimal scavenging efficiency
Bearings that handle the exact RPM and torque loads of your engine series
Heavy-duty seals that prevent oil migration into the airbox

Blower Gasket Installation Kits

Every time you remove or replace a blower, you’ll need new gaskets to ensure a reliable seal. Our installation kits include:

Blower-to-block gaskets
Intake and discharge gaskets
Seals for end plates and inspections
Additional hardware like o-rings or spacers if your engine demands it

Available specifically for each engine model and whether it’s a 2-valve or 4-valve head, ensuring a perfect fit and long-lasting seal.

Blower Repair Kits

For customers with blower housings and rotors still in good condition, our repair kits provide a cost-effective way to restore performance. Each kit typically includes:

New precision-fit bearings
Oil seals and retainer clips
End plate shims to set proper rotor end play
Rotor timing hardware where needed

Rebuilding with our kits can extend blower life significantly and protect your investment by keeping the original housing in service.

Blower Shafts

The blower shaft is critical — it transmits power directly from the engine’s gear train to spin the blower rotors. If worn, chipped, or if splines become damaged:

It can destroy new bearings or cause catastrophic rotor contact.
We stock hardened, machined blower shafts engineered for each Detroit Diesel series, with precise spline and length specifications.

Replacing the shaft during a blower overhaul is best practice to ensure smooth operation and long-term reliability.

Blower Couplings

The blower coupling connects the blower shaft to the drive gear. It ensures that power is transferred efficiently and dampens minor misalignments between components. Over time, couplings can develop cracks, lose tension, or wear on the keyway.

We carry:

High-strength blower couplings built to handle the torque of Detroit Diesel two-stroke engines
Couplings sized for the exact shaft diameter and gear pocket of your specific engine model
New mounting hardware if needed to complete the installation

Replacing an aging or worn coupling along with your blower or blower shaft helps prevent vibration, noise, and premature bearing wear — protecting your entire air system.

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