Detroit Diesel 2-71 Torque Specifications

June 9, 2023

Detroit Diesel 2-71 Torque Specifications

Thread Size (in.)
Description
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
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
Standard Torque Specification 46-50 62-68
Bolt-Blower to Block 55-60 75-81
7/16-20
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

Plug Size (in.)
Description
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

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:


Detroit Diesel Rebuild Kit for 2-71 Engine
Detroit Diesel Rebuild Kit for 2-71 Engine

  • Overhaul Kits for Detroit Diesel 271  : 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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