Parts for Detroit Diesel 8V71 Non-Turbo for Canada - Oil Pump Section

Parts for Detroit Diesel 8V71 Non-Turbo – Oil Pump Section

The Detroit Diesel 8V71 Non-Turbo engine is one of the most recognized and enduring engines in the Detroit Diesel lineup, powering vessels, trucks, generators, and heavy machinery for decades. At the heart of this classic two-stroke design lies a reliable oiling system that ensures consistent lubrication under all operating conditions. Maintaining proper oil pressure and flow is vital for preserving the life of your engine’s bearings, pistons, and crankshaft assemblies.

This section focuses exclusively on oil pumps and related lubrication components for the Detroit Diesel 8V71 Non-Turbo engine, offering everything from rebuilt oil pumps to gaskets, shims, pressure regulators, oil coolers, and filter assemblies—all precisely matched for the Series 71 platform.

Understanding the Detroit Diesel 8V71 Oil System

The 8V71 is a V-8, two-stroke diesel engine with a displacement of 9.3 liters (568 cubic inches). Unlike four-stroke designs, the Series 71 family uses scavenging blowers to move air through the cylinders, which also influences how lubrication must be managed. Oil is pumped through a network of galleries that reach the crankshaft, bearings, camshaft, and blower drive gears, maintaining a thin film of protection at all times.

The oil pump plays the most critical role in this system. Driven directly by the engine gear train, it draws oil from the pan and pressurizes it before routing it through filters, coolers, and internal passages. Over time, wear or debris can reduce the pump’s efficiency—resulting in lower pressure, noisy operation, or increased bearing wear. Regular inspection and timely replacement of worn components ensure long engine life and steady oil pressure under heavy load.

Oil Pump Assemblies for the 8V71 Non-Turbo Engine

Right-Hand Rebuilt Oil Pump

The right-hand rotation oil pump is engineered for applications where the engine’s gear rotation follows the standard configuration. Each rebuilt unit is disassembled, inspected, machined, and tested to meet OEM flow and pressure standards. The gears and housings are checked for precise clearance, ensuring proper oil volume at low and high RPMs.

These rebuilt pumps are sold with a refundable core deposit, emphasizing Diesel Pro Power’s sustainable remanufacturing process. By reconditioning original Detroit Diesel cores, customers receive a like-new unit that meets or exceeds factory specifications while reducing waste and cost.

Left-Hand Rebuilt Oil Pump

The left-hand configuration serves reverse-rotation engines typically used in twin-engine marine setups or specialized equipment requiring opposite rotation. Each pump is rebuilt under the same rigorous standards and pressure-tested for quality assurance. Proper installation guarantees synchronized oil flow across mirrored propulsion systems.

Scavenging-Type Oil Pump

The scavenging-type pump is designed to efficiently manage oil return from lower crankcase areas to maintain stable lubrication even at steep vessel angles or under prolonged heavy-duty operation. Its precision-machined gears deliver smooth oil flow, minimizing cavitation and pressure drop. Rebuilt and sold with a refundable core, this pump is ideal for operators seeking long-term dependability.

Supporting Components for the 8V71 Oil System

Oil Pump Gaskets and Mounting Seals

Maintaining proper sealing between the oil pump, mounting pad, and surrounding housings is crucial for pressure integrity. Diesel Pro Power offers a full range of gaskets for oil pump pads, crankshaft front covers, and adaptor housings—each manufactured from durable, heat-resistant materials compatible with petroleum-based and synthetic oils.

• Oil Pump Pad Cover Gasket – Provides a tight seal between the pump housing and the engine block, preventing leaks and pressure loss.

• Crankshaft Front Cover Gasket – Keeps the timing gear and oil passages isolated from external contaminants.

• Oil Pressure Regulator Gasket – Ensures a leak-free connection around the pressure-control assembly.

Each gasket is precision-cut to OEM specifications for a perfect fit on 8V71 engines.

Oil Pump Shims

Oil pump shims are thin spacers used to calibrate end clearance and maintain proper gear engagement. Available in thicknesses such as .005, .010, and .020 inches, they allow technicians to fine-tune pump alignment and performance. Correct shimming prevents excessive wear, maintains optimal oil pressure, and extends pump service life.

Oil Pressure Regulator and Relief Valves

The oil pressure regulator valve controls the amount of oil pressure delivered to the system, ensuring consistent lubrication regardless of engine speed. The relief valve prevents over-pressurization, protecting seals and gaskets from damage. Each valve is built from corrosion-resistant materials, carefully calibrated to Detroit Diesel specifications, and complemented by high-tension springs that maintain proper pressure thresholds.

Regulator Springs

Matching regulator springs restore proper resistance within the pressure-control assembly. Over time, springs can fatigue, resulting in low oil pressure readings. Replacing them during pump service ensures stable operation and prevents erratic pressure fluctuations.

Oil Coolers and Heat-Management Components

Lubrication is only effective when the oil remains at a stable temperature. The 8V71’s oil cooler plays a critical role in removing heat from the engine’s lubricating oil before it re-enters circulation. Diesel Pro Power supplies a complete line of oil coolers and gaskets designed for single- and double-stack configurations.

13-Plate Oil Cooler

Ideal for standard-duty applications, the 13-plate cooler efficiently maintains oil temperature within operational limits. Each cooler is built with precision-brazed plates for optimal thermal transfer and pressure resistance.

16-Plate and 18-Plate Oil Coolers

These configurations are suited for high-load environments such as commercial vessels or generators operating for extended hours. The increased surface area allows greater heat dissipation, preserving oil viscosity and preventing thermal breakdown.

24-Plate Coolers (With or Without Nipples)

For extreme duty cycles or tropical marine applications, the 24-plate design maximizes cooling efficiency. Diesel Pro Power also provides variants with pre-installed nipples to streamline installation and improve flow control between the oil cooler and filter housing.

Oil Cooler Gasket Sets

A wide selection of gaskets accompanies every cooler type, including:

• Oil cooler cover gaskets

• Adapter gaskets

• Housing seals

• Water manifold to oil cooler housing seals

Each gasket ensures a tight fit that prevents oil-to-water cross-leaks—essential for protecting both lubrication and cooling systems.

Oil Filtration System Components

Clean oil is essential to the long-term health of the 8V71 engine. Contaminants such as soot, carbon, or metallic debris can cause rapid wear of precision components. Diesel Pro Power offers both spin-on and cartridge-type filters, along with associated bases, adaptors, and gaskets.

Oil Filter Bases and Adaptors

The original 8V71 design used cartridge-style filters; however, many operators upgrade to spin-on filters for convenience and quicker servicing. Diesel Pro Power provides adaptors that convert from cartridge to spin-on systems while maintaining proper flow direction and filtration integrity. Each adaptor is machined for leak-free installation.

Oil Filters

• Spin-On Type – Compact and easy to replace, featuring high-capacity media for extended service intervals.

• Cartridge Type – Preferred in classic or restored engines, these filters maintain the original configuration and allow inspection of filter elements after removal.

Filter Gaskets and Washers

Every filter installation requires precise sealing. Diesel Pro Power offers oil filter adaptor gaskets and copper washers for accurate compression and leak prevention. Proper sealing ensures oil pressure is not lost through small leaks at the base or fittings.

Dipsticks, Tubes, and Measurement Accessories

Accurate oil-level monitoring is essential for proper lubrication. The Detroit Diesel 8V71 employs robust dipstick assemblies that must fit tightly and withstand vibration. Replacement dipsticks are available in multiple lengths to match marine or industrial sump configurations.

• Dipstick Assemblies (27 in. to 44 in.) – Made from corrosion-resistant steel with clearly marked measurement lines.

• Dipstick Tubes and Guides – Ensure smooth insertion and correct alignment for accurate readings.

Routine oil checks help operators detect leaks, consumption issues, or over-filling that can cause crankcase aeration.

Seals, Gaskets, and Water-to-Oil Interfaces

The 8V71’s integrated cooling and lubrication circuits meet at several connection points requiring reliable sealing. Diesel Pro Power provides all necessary water manifold to oil cooler seals, housing gaskets, and cover gaskets in multiple diameters (2 ½″ – 2 ¾″). These seals prevent oil contamination in the coolant system and vice versa, preserving both fluids’ integrity.

Materials such as nitrile rubber and reinforced composite are chosen for resistance to diesel fuel, lubricating oil, and marine coolant solutions. Correct seal installation is critical for preventing leaks that could lead to overheating or oil dilution.

Pressure Switches and Monitoring Devices

To monitor system performance, oil pressure switches are available in 5 PSI, 10 PSI, 20 PSI, and 27 PSI make-break configurations. These switches connect directly to the engine’s electrical system to trigger alarms or shutdowns in case of low pressure. They are factory-tested for reliability under vibration and heat typical of Detroit Diesel marine and industrial environments.

Finishing Touches and Maintenance Accessories

• Detroit Diesel Engine Paint – Green Finish: Protects surfaces and restores the original Detroit Diesel color for corrosion resistance and visual appeal.

• Oil Filter Removal Wrench: Adjustable between 4-21/32″ and 5-5/32″ for secure removal of filters without damage.

Small accessories like these complete a professional maintenance toolkit, ensuring smooth servicing operations and consistent performance.

Why Choose Diesel Pro Power for 8V71 Oil System Components

With more than 40,000 satisfied customers worldwide, Diesel Pro Power has built a reputation as the leading online supplier of Detroit Diesel engine parts. Each product in our catalog—whether new, rebuilt, or remanufactured—is verified by experts for fit, function, and quality.

Key Advantages

• Guaranteed Compatibility: All components are precision-matched to the Detroit Diesel 8V71 Non-Turbo engine.

• Extensive Inventory: From oil pumps and coolers to shims and gaskets, nearly every lubrication-system part is in stock and ready to ship.

• Rebuilt Excellence: Our remanufactured pumps and components undergo multi-stage inspection and testing to ensure long-term reliability.

• Global Shipping: Fast worldwide delivery directly from our U.S.-based distribution center.

• Technical Support: Knowledgeable specialists available to assist with identification, installation, and troubleshooting.

• Online Convenience: 24/7 secure ordering and real-time availability updates.

When you choose Diesel Pro Power, you gain not only top-quality replacement parts but also confidence backed by decades of industry experience. Every item is designed to restore or exceed the original Detroit Diesel performance standard—ensuring that your 8V71 engine continues running strong, efficient, and dependable for years to come.