Parts for Detroit Diesel 471 Non-Turbo - (4 Valve Head Type) - Blower Section

Parts for Detroit Diesel 4-71 Non-Turbo (4-Valve Head) – Blower Section

The Detroit Diesel 4-71 Non-Turbo (4-Valve Head) engine relies on its Roots-type blower for the vital scavenging process that keeps air flowing through the cylinders. Because this is a two-stroke engine, a properly functioning blower isn’t optional — it’s essential for maintaining power, fuel efficiency, and smooth operation. This section includes rebuilt blowers, installation kits, shafts, couplings, seals, gaskets, and accessories designed specifically for the 4-71 series.

Rebuilt 4-71 Blowers

• Left-Hand (LH) Blower – Mounts on the left side of the engine.

• Right-Hand (RH) Blower – Mounts on the right side of the engine.

Each blower is professionally rebuilt to factory standards. Components such as bearings, seals, and gaskets are replaced, and rotor timing is precisely set to OEM specifications. Every blower is bench-tested to ensure strong airflow and proper scavenging pressure.
All units are sold with a refundable core deposit.

Blower Repair & Installation Kits

• Blower Repair Kit (Series 71) – Contains bearings, seals, and gaskets to restore tight tolerances and proper internal pressure.

• Blower Installation Gasket Kit (4-71) – Includes all necessary gaskets to reseal the blower to the cylinder block, airbox, and drive housing. Proper sealing prevents air leaks and ensures even combustion.

Shafts, Couplings & Drive Components

• Blower Coupling (48-Spline) – Transfers torque from the gear drive to the blower input shaft with precision fit and minimal backlash.

• Blower Shafts – Available in multiple lengths to match your 4-71’s front cover or accessory configuration. Each is balanced for vibration-free operation.

• Blower Shaft Retainer – Holds the shaft securely in position to prevent end play and maintain timing accuracy.

• Blower Rotor Gear Hub – Connects the timing gear to the blower rotor, ensuring synchronized movement of the lobes.

Lubrication & Oil Supply Components

• Tube Assembly (Blower Drive Lubrication) – Provides a steady oil supply to the blower’s drive-end bearing for reliable performance.

• Oil Supply Tube (Governor Drive) – Feeds lubrication to the governor linkage assembly, ensuring consistent throttle response and smooth control.

Gaskets & Seals

Maintaining proper sealing is critical to 4-71 performance. The following items eliminate air and oil leaks and maintain internal pressure integrity:

• Blower Drive Gear Cover Gasket – Seals the front gear housing.

• Blower Screen Gasket – Protects the air inlet and prevents debris entry.

• Blower-to-Block Gasket (4-71) – Provides a tight airbox seal for efficient scavenging.

• End Plate Gaskets – Fit older-style blowers to prevent internal leakage.

• Governor Drive Gaskets – Include drive, housing, and spring cover gaskets.

• Blower Seals & Sleeves – Keep oil out of the airbox and restore proper shaft sealing surfaces.

Air Intake & Silencer Components

• Industrial Air Cleaner – High-efficiency filter designed to trap dirt and contaminants before they reach the blower rotors.

• Marine Silencer (4-71) – Reduces intake noise without restricting airflow. Built from corrosion-resistant materials for marine environments.

Air Box Breather & Governor Components

• Air Box Breather Valve – Balances crankcase pressure, reduces oil mist, and improves idle quality.

• Hydraulic Governor Gasket – Ensures tight sealing between the governor housing and drive for consistent oil pressure and throttle control.

Electrical & Control Components

• Shutdown Solenoids (12V / 24V) – Reliable fuel cut-off devices for both maintenance and emergency shutdowns.

• Teleflex Morse Terminals (¼", Series 40) – Ball joint and clevis-type cable ends for marine throttle and governor control systems.

Finishing & Assembly Supplies

• Detroit Diesel Green Paint – Factory-correct, heat-resistant finish for corrosion protection.

• High-Tack Gasket Spray Sealant – Secures gaskets during installation and prevents leaks from pressure or vibration.

Why Buy from Diesel Pro Power

Exact Fit for the 4-71 (4-Valve Head)
All parts are engineered to OEM specifications to ensure perfect compatibility and long service life.

Trusted by 40,000+ Customers Worldwide
Diesel Pro Power supplies professionals in over 180 countries, offering fast shipping and dependable service.

Expert Support
Our specialists help you identify correct blower orientation (LH/RH), gasket sets, and shaft lengths to ensure proper fitment.

Everything in One Place
Rebuilt blowers, kits, couplings, gaskets, seals, and silencers — all available together for hassle-free ordering.