Parts for Detroit Diesel 671 Non-Turbo - (2 Valve Head Type) for Canada - Marine Water Pump Section

Parts for Detroit Diesel 671 Non-Turbo (2 Valve Head Type) – Marine Water Pump Section

The Detroit Diesel 6-71 Non-Turbo (2-Valve Head Type) engine is one of the most recognizable and long-lasting marine powerplants ever built. Its simple design, robust mechanical injection system, and remarkable durability have made it a staple in commercial and private marine vessels for decades. One of the most essential systems on any Detroit Diesel 671 marine engine is the raw water pump, responsible for drawing seawater into the cooling system to regulate engine temperature and prevent overheating.

This section provides a complete overview of high-quality marine water pumps, replacement impellers, seals, gaskets, zincs, and all related components available at Diesel Pro Power—the trusted global source for Detroit Diesel marine parts. With over 40,000 satisfied customers worldwide, Diesel Pro Power ensures that every replacement part meets or exceeds OEM standards, offering both new and rebuilt options to keep your Detroit 671 operating efficiently for years to come.

Marine Water Pumps for Detroit Diesel 671 Non-Turbo Engines

New Marine Water Pump – Complete Assembly

The new raw water pump for the Detroit Diesel 6-71 Non-Turbo engine is designed for bidirectional operation, allowing it to turn either right or left depending on engine rotation. This versatility makes it suitable for various vessel configurations.

Each pump comes fully assembled with a 1-inch flange port, drive gear, and mounting adapter, ensuring a direct fit and easy installation. Manufactured to high corrosion-resistant standards, the pump housing is precision-machined from marine-grade bronze, offering longevity even in saltwater environments.

Key features include:

• Durable bronze construction for maximum corrosion resistance.

• Bidirectional rotation capability for flexibility in installation.

• Pre-installed drive gear for plug-and-play convenience.

• Smooth internal passages for optimal seawater flow and cooling efficiency.

• Fully compatible with the Detroit Diesel 6-71 Non-Turbo (2-Valve Head) marine engine.

Rebuilt Marine Water Pump – Premium Certified

The rebuilt version of the Detroit Diesel 6-71 raw water pump is remanufactured to strict Diesel Pro Power specifications. Each pump undergoes a comprehensive inspection and replacement process that includes new bearings, seals, wear plates, and impellers. The rebuilt pumps are performance-tested to ensure consistent flow rates and pressure equal to or greater than new OEM units.

This pump features a 1½-inch flange port, adapter, and drive gear, with an impeller height of 2½ inches. It’s designed to deliver dependable cooling performance under continuous load—ideal for workboats, tugs, and yachts powered by the 671 Non-Turbo engine.

Benefits of choosing a rebuilt unit include:

• Cost-effective alternative to a brand-new pump.

• Fully bench-tested before shipment.

• Includes refundable core deposit for environmentally responsible remanufacturing.

• Guaranteed compatibility with all 6-71 Non-Turbo marine engine configurations.

Impellers and Replacement Components

Impeller Options for Detroit Diesel Marine Water Pumps

The impeller is the heart of any raw water pump, responsible for drawing and circulating seawater through the heat exchanger. Over time, impeller blades can harden, crack, or wear down, reducing flow efficiency and risking engine overheating.

Diesel Pro Power offers 12-blade impellers with 12-spline drives, available in standard sizes such as 2½ inches or 3¾ inches in diameter depending on the pump model. Each impeller is constructed from high-quality neoprene or nitrile rubber compounds that resist saltwater corrosion, heat, and deformation.

Maintenance tip: Impellers should be inspected every 200–250 hours or at least once a season to ensure reliability. Always replace the impeller if any cracks, swelling, or missing blades are visible.

Water Pump Repair Kits

For Detroit Diesel 6V53, 6V71, and 6-71 series engines, the marine water pump repair kit offers a complete solution to rebuild an existing pump. Each kit includes precision seals, O-rings, bearings, wear plates, and gaskets. These kits are especially valuable for maintaining older or legacy marine pumps that may not require full replacement.

Features include:

• All seals and components needed for full pump reconditioning.

• Compatible with 2½-inch impeller height pumps.

• Easy to use for on-board maintenance or workshop repair.

• Extends the life of the existing water pump assembly.

Gaskets, Seals, and Couplings

Marine Water Pump Gaskets

Proper sealing is critical in marine cooling systems. Diesel Pro Power offers an extensive range of OEM-spec gaskets for thermostat housings, mounting plates, adapters, and water inlet and outlet ports.

Each gasket is precision-cut from marine-grade materials that resist heat, pressure, and salt exposure. Specific gaskets such as thermostat housing, mounting gaskets, and flywheel housing gaskets ensure leak-free operation throughout the cooling circuit.

Key options include:

• Thermostat housing gasket – maintains a perfect seal around the temperature control assembly.

• Mounting gasket for raw water pump – provides secure installation between the pump and engine flange.

• Flywheel-to-water pump gasket – ensures alignment and prevents coolant leaks at the pump connection.

Seals for Marine Water Pumps

A worn-out seal can cause seawater leakage, leading to premature bearing failure or corrosion within the pump. Diesel Pro Power carries premium mechanical and oil seals specifically designed for Detroit Diesel marine applications.

• Mechanical seals prevent seawater intrusion into bearing assemblies.

• Bearing oil seals ensure lubrication integrity and extend the service life of rotating components.

• Adapter and gland seals maintain pressure integrity in the heat exchanger and tank systems.

Each seal is constructed from stainless steel and high-grade elastomer compounds to ensure durability under high load and thermal stress.

Accessory Drive Couplings

The Detroit Diesel accessory drive coupling (21 teeth) is used to connect the raw water pump to the engine’s accessory drive shaft. Proper alignment and secure coupling are crucial for preventing vibration and premature wear. Diesel Pro Power’s couplings are CNC-machined for precise tooth engagement and long-lasting reliability.

Heat Exchangers and Cooling Accessories

Marine Heat Exchanger Tanks and Cores

For complete cooling system support, Diesel Pro Power also offers heat exchanger tanks and cores designed for Detroit Diesel 371, 471, and 671 engines. These components transfer heat from the engine coolant to seawater efficiently, ensuring the engine runs at the correct operating temperature.

• Used and reconditioned tanks are available for those maintaining classic 671 marine engines.

• Heat exchanger cores are fully tested for leaks and built to OEM dimensional standards.

• Gasket kits include every seal required for reassembling a cleaned or serviced exchanger.

Properly functioning heat exchangers are critical for maintaining engine temperature stability during extended operation in warm or tropical waters.

Zinc Anodes – Corrosion Protection

To protect your 671 Non-Turbo engine’s cooling system from galvanic corrosion, zinc anodes are essential. Diesel Pro Power carries multiple sizes of brass-plugged zincs compatible with raw water pumps, fuel coolers, and oil coolers.

Common sizes include:

• NPT ¾” zinc – used in marine water pumps and heat exchangers.

• NPT ½” zinc – for aftercoolers and smaller coolant circuits.

• NPT ⅛” zinc – for fine corrosion control in small coolant chambers.

Replacing zinc anodes every six months (or sooner in warm, salty waters) helps preserve the internal passages of your cooling system from electrolysis and pitting.

Thermostats and Temperature Regulation

The Detroit Diesel thermostat for the 6-71 Non-Turbo engine opens at 173°F, ensuring steady engine operating temperature and preventing overheating during heavy loads or slow-speed cruising. Diesel Pro Power supplies OEM-quality thermostats, as well as matching thermostat gaskets and housing gaskets, to maintain a reliable cooling cycle.

Features:

• Precisely calibrated opening temperature.

• Corrosion-resistant housing for long service life.

• Essential for maintaining ideal fuel efficiency and power output.

Hoses, Clamps, and Connectors

Silicone Coolant Hoses

High-performance silicone coolant hoses are available in sizes from 1 inch to 4 inches in inside diameter, sold by the foot for easy customization. Silicone hoses offer superior flexibility, heat resistance, and pressure durability compared to standard rubber hoses, making them perfect for marine use.

Each hose can withstand prolonged exposure to high coolant temperatures without softening or cracking. They are compatible with all Detroit Diesel 6-71 cooling circuits, including the raw water intake, discharge, and engine coolant lines.

Stainless Steel Hose Clamps

Diesel Pro Power offers a variety of hose clamps sized for coolant and fuel hoses, ensuring secure and leak-free connections. Each clamp is made from marine-grade stainless steel with a smooth inner band to prevent hose abrasion.

Available size ranges include:

• 9/16" to 1-1/16" (for smaller coolant hoses).

• 1-5/16" to 2-1/4" (for main circulation hoses).

• 2-5/16" to 3" and larger (for heat exchanger connections).

Regular inspection and replacement of clamps prevent coolant leaks and system pressure loss—critical for maintaining consistent engine cooling performance.

Finishing Components and Accessories

Paint and Finishing Supplies

Keep your Detroit Diesel engine looking factory-new with Detroit Green engine paint, the signature finish for classic 6-71 engines. Formulated for heat resistance and oil adhesion, it helps protect against corrosion and adds professional appearance to rebuild projects.

Radiator Caps and Necks

The radiator cap maintains coolant pressure, ensuring optimal boiling point and circulation efficiency. Diesel Pro Power offers 7 psi pressure caps and precision-machined neck fittings to complete any cooling system overhaul.

Bearings, Plates, and Covers

Wear plates, cover screws, and camshafts for raw water pumps are all available individually, allowing precise restoration of pump assemblies. These small yet crucial parts ensure alignment, reduce internal friction, and prevent leaks around the pump housing.

Why Buy Marine Water Pump Parts for Detroit Diesel 671 Non-Turbo from Diesel Pro Power

Diesel Pro Power stands apart as the world’s most trusted supplier for Detroit Diesel marine parts. With over 40,000 satisfied customers worldwide and a dedicated inventory of genuine and remanufactured parts, Diesel Pro ensures every purchase delivers long-term reliability and superior performance.

Unmatched Quality and Compatibility

All parts—whether new, rebuilt, or reconditioned—meet or exceed OEM specifications for the Detroit Diesel 6-71 Non-Turbo engine. Every pump, gasket, impeller, and seal is tested to perform under continuous marine duty conditions.

Fast Global Shipping and Real-Time Tracking

Diesel Pro Power ships directly to customers across the world, offering real-time tracking, same-day processing, and a fully stocked warehouse to minimize downtime.

Expert Support and Proven Knowledge

The Diesel Pro team consists of Detroit Diesel-trained specialists who can help customers identify the correct water pump type, impeller height, or port size for their specific engine setup.

All-in-One Convenience

From complete water pumps to the smallest gasket or zinc anode, Diesel Pro Power provides everything you need for the Detroit Diesel 6-71 Non-Turbo cooling system in one place—simplifying ordering and ensuring guaranteed compatibility.

A Legacy of Trust and Performance

With decades of experience serving both commercial and recreational operators, Diesel Pro Power is not just a parts supplier—it’s a maintenance partner dedicated to keeping legendary engines like the Detroit Diesel 6-71 running strong.