Detroit Diesel 2-71 Torque Specifications |
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Thread Size (in.)
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Description
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Torque Specifications | |
| lb-ft | N-m | ||
| 1/4-20 | Standard Torque Specification | 7-9 | 9-12 |
|
1/4-28
|
Standard Torque Specification | 8-10 | 11-14 |
| Screw-Injector Rack Control Lever | 2-3 | 3-4 | |
| 5/16-18 | Standard Torque Specification | 13-17 | 18-23 |
|
5/16-24
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Standard Torque Specification | 15-19 | 20-26 |
| Nut-Lock-Push Rod | 15-19 | 20-26 | |
|
3/8-16
|
Standard Torque Specification | 30-35 | 41-47 |
| Bolt-Air Inlet Housing to Blower | 30-35 | 41-47 | |
| Bolt-Air Box Cover | 10-12 | 14-16 | |
| Bolt-Oil Pan | 10-12 | 14-16 | |
| Bolt-Injector Clamp | 20-25 | 27-34 | |
|
3/8-24
|
Standard Torque Specification | 35-39 | 47-53 |
| Nut-Fuel Jumper Line | 12-16 | 16-22 | |
| Nut-Exhaust Outlet Manifold Flange (Brass) | 20-25 | 27-34 | |
| Nut-Injector Clamp | 20-25 | 27-34 | |
|
7/16-14
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Standard Torque Specification | 46-50 | 62-68 |
| Bolt-Blower to Block | 55-60 | 75-81 | |
|
7/16-20
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Standard Torque Specification | 57-61 | 77-83 |
| Bolt-Oil Strainer Shell to Adaptor | 30-35 | 41-47 | |
| Bolt-Connecting Rod to Pin | 55-60 | 75-81 | |
| Nut-Connecting Rod | 60-75 | 81-102 | |
| Nut-Connecting Rod | 60-75 | 81-95 | |
|
1/2-13
|
Standard Torque Specification | 71-75 | 96-102 |
| Bolt-Rocker Shaft Bracket to Cyl Head | 90-100 | 122-136 | |
| 1/2-20 | Standard Torque Specification | 83-93 | 113-126 |
| 9/16-12 | Standard Torque Specification | 90-100 | 122-136 |
|
9/16-18
|
Standard Torque Specification | 107-117 | 145-159 |
| Bolt-Flywheel | 180-190 | 244-258 | |
|
5/8-11
|
Standard Torque Specification | 137-147 | 186-199 |
| Bolt-Main Bearing (Boring) | 165-175 | 224-237 | |
| Bolt-Main Bearing (Assembly) | 180-190 | 244-258 | |
| Bolt-Cylinder Head | 190-200 | 258-271 | |
|
5/8-18
|
Standard Torque Specification | 168-178 | 228-241 |
| Nut-Special Self Locking Nut (10SI Alternator) | 40-60 | 54-81 | |
| Bolt-Lube Oil Filter Center | 50-60 | 68-81 | |
| Nut-Alternator Pulley | 70-80 | 95-108 | |
| 3/4-18 | Nut-Standard, Dipstick Tube | 30-35 | 41-47 |
| 3/4-16 | Standard Torque Specification | 290-300 | 393-407 |
| 7/8-14 | Standard Torque Specification | 475-485 | 644-658 |
| 1-14 | Bolt-Crankshaft End (1) | 290-310 | 393-420 |
| 1-14 | Bolt-Crankshaft End-1-1/2 Hex Head (2) | 440-460 | 597-624 |
| 1-20 | Nut-Cam and Balance Shaft | 250-275 | 339-373 |
Detroit Diesel 2-71 Pipe Plug Torque Specifications |
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Plug Size (in.)
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Description
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Torque Specifications | |
| lb-ft | N-m | ||
| 1/8-27 | Plug-Pipe (3/4 Taper) | 10-12 | 14-16 |
| 1/4-18 | Plug-Pipe (3/4 Taper) | 14-16 | 19-22 |
| 1/4-18 | Plug-Pipe (7/8 Taper) | 14-16 | 19-22 |
| 3/8-18 | Plug-Pipe (3/4 Taper) | 18-22 | 24-30 |
| 3/8-18 | Plug-Pipe (7/8 Taper) | 18-22 | 24-30 |
| 1/2-14 | Plug-Pipe (3/4 Taper) | 23-27 | 31-37 |
| 1/2-14 | Plug-Pipe (7/8 Taper) | 23-27 | 31-37 |
| 3/4-14 | Plug-Pipe (3/4 Taper) | 33-37 | 45-50 |
| 3/4-14 | Plug-Pipe (7/8 Taper) | 33-37 | 45-50 |
| 1-11 1/2 | Plug-Pipe (3/4 Taper) | 75-85 | 102-115 |
| 1-11 1/2 | Plug-Pipe (7/8 Taper) | 75-85 | 102-115 |
| 1 1/4-11 1/2 | Plug-Pipe (3/4 Taper) | 95-105 | 129-142 |
| 1 1/2-11 1/2 | Plug-Pipe (3/4 Taper) | 110-130 | 149-176 |
| 1 1/2-11 1/2 | Plug-Pipe (7/8 Taper) | 110-130 | 149-176 |
| 1/2-20 | Plug-Fuel Pump Relief Valve | 18-22 | 24-30 |
Detroit Diesel 2-71 Stud Torque Specifications |
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Thread Size (in.)
|
Description
|
Torque Specifications | |
| lb-ft | N-m | ||
| 7/16-20 | Stud Standard | 30-35 | 41-47 |
Parts Catalog for Detroit Diesel 271
At Diesel Pro Power, we provide a comprehensive range of aftermarket parts for the Detroit Diesel 271 engine, designed to enhance performance, reliability, and longevity. Our catalog includes:

- Overhaul Kits for Detroit Diesel 271Â : Complete kits to refresh your engine, restoring power and efficiency and extending its lifespan.
- Fresh Water Pumps for Detroit Diesel 271: These pumps keep your engine cool by circulating fresh water through the cooling system, crucial for long hours of operation.
- Raw Water Pumps for Detroit Diesel 271: Essential for marine applications, these pumps draw seawater into the system to regulate engine temperature, preventing thermal damage.
- Cylinder Heads for Detroit Diesel 271: Engineered to handle high pressures, these cylinder heads support efficient combustion and reliable power output.
- Fuel Pumps for Detroit Diesel 271: Fuel pumps ensure optimal combustion by delivering fuel at the correct pressure, enhancing engine smoothness and fuel economy.
- Injectors for Detroit Diesel 271: Precision-engineered injectors ensure fuel is delivered correctly to maximize power, efficiency, and reduce emissions.
- Oil Coolers & Oil Lubricating Pump for Detroit Diesel 271: These components help maintain oil viscosity by cooling the oil and pumping it through the engine for lubrication.
- Crankshafts for Detroit Diesel 271: Our crankshafts convert engine power into rotational motion, ensuring reliable performance under demanding conditions.
- Camshafts for Detroit Diesel 271:  These control the engine’s valve timing, crucial for efficient combustion and maintaining optimal performance.
- Gaskets for Detroit Diesel 271: High-quality gaskets prevent leaks, maintain compression, and ensure overall engine efficiency and durability.
Why Buy Detroit Diesel 2-71 Parts from Diesel Pro Power
A Company Built on Trust and Expertise
When sourcing parts for a Detroit Diesel 2-71 engine, the reliability of the supplier is just as important as the quality of the components. Diesel Pro Power has earned a global reputation as one of the most trusted names in Detroit Diesel support, with more than 40,000 satisfied customers across 180 countries. Our company has spent decades specializing in legacy two-stroke engines like the 2-71, giving us unparalleled technical knowledge and insight that general parts suppliers simply cannot match.
Specialists in Legacy Detroit Diesel Engines
The Detroit Diesel 2-71 is a historic engine with unique requirements, and Diesel Pro Power’s team understands the platform inside and out. Our specialists help customers identify the exact components needed for their specific configuration, ensuring accuracy and eliminating guesswork. Whether you’re maintaining a standby generator, marine auxiliary engine, industrial machine, or vintage equipment, our expertise ensures you receive the right guidance every time.
Fast, Reliable Service With Real Inventory
Downtime is costly, especially when dealing with older engines that may be difficult to support. Diesel Pro Power maintains extensive inventory for the 2-71—including items often discontinued elsewhere—allowing us to ship most orders the same day. Our consistent stock levels and rapid fulfillment help operators avoid delays and keep equipment running without interruption.
Long-Term Customer Commitment
Beyond providing parts, Diesel Pro Power offers long-term support built on professionalism, responsiveness, and problem-solving. We stand behind every product we ship and every customer we serve, making us the preferred partner for Detroit Diesel 2-71 owners who value reliability, experience, and exceptional service.



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