Parts for Detroit Diesel 471 Non-Turbo - (2 Valve Head Type) for Canada - Cylinder head Section

Parts for Detroit Diesel 4-71 Non-Turbo (2-Valve Head Type) — Cylinder Head Section

The Detroit Diesel 4-71 Non-Turbo 2-Valve engine is one of the most reliable and enduring powerplants ever built. Designed for both marine and industrial applications, it uses a rugged two-valve cylinder head configuration that delivers durability, balanced airflow, and simplified serviceability. Diesel Pro Power provides a full catalog of replacement and rebuilt cylinder heads, gaskets, valves, guides, and related components—everything needed to restore compression, performance, and reliability to your classic Detroit Diesel engine.

All components in this section are in stock, ready to ship worldwide, and backed by Diesel Pro Power’s record of serving 40,000+ satisfied customers. Whether you’re rebuilding a 4-71 powering a generator, a fishing vessel, or a stationary pump, you’ll find everything necessary for a professional-grade cylinder head rebuild here.

Rebuilt Cylinder Heads for Detroit Diesel 4-71

Detroit Diesel Cylinder Head — Rebuilt (Bare)
A professionally rebuilt bare cylinder head for the 4-71 2-valve engine, meticulously machined to factory specifications. This head includes all major machining processes such as resurfacing, pressure testing, and valve seat reconditioning. Sold bare—without valves or springs—so you can install your preferred valve train components.
Each rebuilt head carries a refundable core deposit, ensuring that quality used cores remain in circulation for future rebuilds.

Key Benefits:

• OEM-spec tolerances ensure proper sealing and performance

• Ideal for mechanics seeking full control over valve train setup

• Includes pressure test certification

• Backed by Diesel Pro Power’s quality guarantee

• Eligible for a refundable core credit upon return of your used head

Detroit Diesel Cylinder Head — Rebuilt with Valves & Springs
A complete rebuilt head ready for direct installation. Each unit is fitted with brand-new valves, valve springs, keepers, and seals. Precision assembly ensures uniform valve height, consistent compression, and optimized airflow for both intake and exhaust ports.

Features:

• Fully assembled and ready to bolt on

• Machined, pressure-tested, and inspected for cracks or distortion

• OEM-grade valve train installed for longevity

• Includes new seals, seats, and retainers

• Eligible for refundable core credit

Choosing the rebuilt head with valves and springs saves significant installation time and ensures consistent performance right out of the box. It’s the top choice for fleet operators and rebuilders who want plug-and-play reliability.

Cylinder Head Bolts & Fasteners

Detroit Diesel Head Bolt
High-strength cylinder head bolt designed for the Detroit Diesel 4-71 engine. Correct 5/8-11 x 5-3/8” thread and length specification ensures proper torque retention and even clamping pressure across the head.

Highlights:

• Heat-treated steel construction

• Maintains head gasket seal under high compression

• Compatible with both rebuilt and new heads

• Sold individually for selective replacement or in sets for complete overhauls

Always replace head bolts during major rebuilds to maintain uniform tension and prevent future gasket failure.

Cylinder Head Gaskets & Sealing Components

Detroit Diesel Head Gasket Kit — Old Style (2-Valve)
Comprehensive gasket kit designed for the 4-71 engine’s two-valve head configuration. Includes the cylinder head gasket, rocker cover seals, water manifold gaskets, and other vital components for a complete top-end reseal.

Benefits:

• OEM-grade materials resistant to heat and oil degradation

• Designed for perfect alignment with older-style heads

• Simplifies full top-end rebuilds

• Includes all necessary seals and washers

Gasket quality directly impacts compression and oil retention; Diesel Pro Power’s kits use proven materials to prevent leaks and maintain long-term reliability.

Valve Covers & Related Components

Valve Cover (Plain, No Filler Hole)
Used valve cover inspected, sandblasted, and primer-painted. This version fits the newer aluminum rocker covers without an oil filler hole. Perfect for rebuilds where oil fill is routed through a separate breather system.

Valve Cover (With Oil Filler Hole)
Used and refurbished valve cover with oil filler opening. Each unit is cleaned, blasted, and primer-coated to prevent corrosion. Compatible with the 4-71, 8V71, 16V71, 8V92, and 16V92 series.

Rocker Cover Gaskets
Available in both new style (gray rubber) for aluminum covers and old style (black rubber) for stamped steel covers. These gaskets maintain an airtight seal between the cover and the head, preventing oil seepage and preserving proper crankcase pressure balance.

Rocker Cover Kit — New Style
Complete kit for aluminum rocker covers, including gaskets and seals for fast and accurate installation.

Valves, Seats, Guides & Springs

The heart of any cylinder head is the valve train. Diesel Pro Power offers every component required to restore the precision operation of your Detroit Diesel 4-71 2-valve system.

Exhaust Valve (30-Degree, 2-Valve Engine)
Manufactured to original Detroit Diesel specifications for perfect seating and heat dissipation. Each valve undergoes hardness testing to ensure resistance to pitting and wear under extreme operating conditions.

Valve Seat (71 Series, 2-Valve Engine)
Precisely machined and hardened for maximum durability. Proper valve seating ensures compression consistency and efficient exhaust flow.

Valve Guide (Series 71)
High-tolerance guide that maintains valve alignment. Essential for minimizing valve stem wear and ensuring consistent oil control.

Valve Stem Seal (Old Style)
Oil-resistant valve stem seal designed to prevent oil from entering the combustion chamber. Crucial for reducing exhaust smoke and maintaining oil economy.

Valve Spring (2-Valve Engine)
Correct tension and free-length spring ensures accurate valve timing and return pressure. Each spring meets OEM spring rate standards and prevents valve float at rated RPM.

All valve train components are sold individually, allowing targeted replacements or complete rebuilds depending on the engine’s condition.

Push Rods, Seats & Retainers

Push Rod Spring & Seat Assemblies
These components maintain alignment and spring tension between the cam follower and rocker arm assembly. Available in both upper and lower configurations, the push rod spring seat helps reduce vibration and ensures smooth cam operation.

Push Rod Spring
Made from hardened wire for long life. Correct free length and coil count for 53, 71, and 92 series engines.

Retainer, Push Rod
Keeps the push rod properly seated in the cam follower assembly, preventing dislodgment during high-speed operation.

Cam Follower & Related Components

Cam Follower Assembly
Transfers motion from the camshaft to the push rods, directly influencing valve timing and lift. Each cam follower is precision-ground to OEM contour for consistent performance.

Cam Follower Guide
Prevents lateral movement and ensures consistent tracking along the cam lobe. Manufactured from durable alloy material and compatible with Series 53, 71, and 92 engines.

Rocker Arm & Bridge Components

Rocker Arm Bracket
Critical component supporting the rocker arms on the cylinder head. Maintains precise geometry between valves and push rods. Heat-treated steel provides superior fatigue resistance.

Valve Bridge Guide
Ensures equal force distribution across paired valves. Proper guide alignment prevents uneven wear and maintains consistent valve lift across cylinders.

Nut for Valve Bridge Regulator & Push Rod
Precision-machined nut for securing valve bridges and push rods. Small but essential for ensuring reliable top-end assembly.

Fuel System Fittings & Injector Tubes

The 4-71’s mechanical injection system relies on a series of fuel jumper lines, fittings, and connectors that must seal perfectly under pressure. Diesel Pro Power supplies OEM-grade replacements for these critical parts.

Injector Tube
Copper alloy injector tube connecting the injector to the fuel rail. Designed for high-pressure fuel delivery and easy installation using the Kent-Moore flaring die tool.

Injector Tube Flaring Die Tool (Kent-Moore J-5286-6)
Specialized tool for seating and flaring Detroit Diesel injector tubes during installation or repair. Ensures proper sealing against fuel leaks.

Fuel Jumper Lines (Short & Long)
Short and long versions used alternately on each bank of injectors to equalize fuel delivery pressure. Constructed of corrosion-resistant steel tubing.

Fuel Connectors & Restriction Fittings
Includes restriction fittings (R70, R80), elbows, and return connectors—all vital for maintaining proper fuel flow and pressure. These fittings are machined for precise restriction values to balance injector return pressure.

Fuel Pipe Connector Washers
Copper sealing washers used on each injector line fitting. Always replaced during injector or line service to ensure leak-free operation.

Elbow & Suction Fittings
90-degree and 45-degree elbows for connecting fuel pump inlet and outlet lines. Machined for standard NPT threads for leak-free installation.

Water Manifold & Cooling Components

Water Manifold Gasket
Seals the connection between the cylinder head and the cooling water manifold. Designed to withstand prolonged exposure to coolant, heat, and vibration.

Water Outlet Plate
Metal plate covering the head’s water outlet ports. Ensures uniform coolant flow from head to manifold.

Stud for Water Manifold
Provides secure mounting for the water manifold assembly on the head. Corrosion-resistant finish extends hardware life in marine environments.

Gasket for Fresh Water Pump
Sealing gasket for the water pump housing, ensuring no coolant leakage between pump cover and housing.

These components are essential for restoring coolant integrity and preventing overheating—particularly important in marine installations where steady water flow protects against heat stress.

Electrical, Gauges & Accessory Components

Temperature Switch
Activates at 205°F, protecting against overheating by triggering alarms or shut-down circuits. Compatible with Detroit Diesel, Cummins, and Caterpillar engines.

Mechanical & Electric Gauges
Choose from mechanical gauges with or without alarms, or electrical gauges in 12-volt and 24-volt configurations. These gauges provide accurate monitoring of oil pressure, water temperature, and other vital engine parameters.

Oil Filler Cap for Head Cover
2-inch diameter cap for the cylinder head’s oil filler port. Heavy-duty sealing design prevents oil splatter and contamination.

Paint & Finishing Supplies

Detroit Diesel Green Engine Paint

OEM-matched paint formulated for high-temperature resistance and chemical durability. Restores your engine’s authentic Detroit Diesel look and provides corrosion protection. Available for ground shipping in the U.S. and Canada.

Why Choose Diesel Pro Power for Your Detroit Diesel 4-71 Cylinder Head Parts

Diesel Pro Power is recognized worldwide as the premier source for Detroit Diesel parts. With more than 40,000 satisfied customers, our commitment to quality and customer satisfaction is unmatched. When you buy from Diesel Pro Power, you’re not just purchasing parts—you’re gaining access to decades of expertise in Detroit Diesel engine restoration.

What Sets Diesel Pro Power Apart:

• Fast Worldwide Shipping: Orders processed and shipped quickly to any destination.

• Proven Quality Control: Every part is inspected, tested, and packaged with care.

• Dedicated Support: Real experts available to assist with part identification and installation guidance.

• Comprehensive Catalog: Everything for the 4-71—from the smallest gasket to fully rebuilt heads.

• User-Friendly Online Store: Simplified search and checkout, designed for professionals and enthusiasts alike.

Whether you’re performing a full overhaul or routine maintenance, Diesel Pro Power ensures you receive the right parts, on time, every time.