Overview of the Detroit Diesel V71 Series Engines (6V71, 8V71, 12V71, 16V71)

December 18, 2024

The Two-Stroke Diesel Engine Design and Its Efficiency


Power with Every Revolution:


Simplified Design:


Key Engine Specifications for the Detroit Diesel V71 Series Engines (6V71, 8V71, 12V71, 16V71)


Features Ensuring Durability and Performance


1. Modular Design


2. Robust Materials


3. Efficient Cooling and Lubrication Systems


4. Interchangeable Parts


5. Roots-Type Blower


6. Durability in Extreme Environments


7. Adaptability for Custom Applications


Why the Detroit Diesel V71 Series Remains a Legend


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Overview of the Detroit Diesel V71 Series Engines (6V71, 8V71, 12V71, 16V71)

Practical Guide To Servicing Your Detroit Diesel V71 Engine

December 18, 2024

Comprehensive Guide to the Detroit Diesel V71 Series Engine Legacy Service Manual 


Introduction To Part 1 Of The Practical Guide To Servicing Your Detroit Diesel V71 Series Engine 6V71, 8V71, 12V71 16V71


2. Overview of the Detroit Diesel V71 Series 6V71, 8V71, 12V71, 16V71


3. General Service Guidelines For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


4. Cylinder Blocks For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


5. Cylinder Heads For Detroit Diesel V71 Series Engines  6V71, 8V71, 12V71, 16V71


6. Fuel and Air Systems For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


7. Lubrication and Cooling Systems For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


8. Electrical and Exhaust Systems For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


9. Troubleshooting and Preventive Maintenance For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


10. Specifications and Torque Tables For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


11. Safety Considerations For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


12. Parts Catalog For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


Comprehensive Guide to the Detroit Diesel V71 Series Engine Legacy Service Manual – Volume 2


1. Introduction To Part 2 Of The Practical Guide To Servicing Detroit Diesel V71 Engines (6V71, 8V71, 12V71, 16V71)


2. Lubrication System For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


3. Cooling System For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


4. Crankcase Ventilation System For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


5. Detailed Torque and Specifications For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


6. Service Tools For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


7. Step-by-Step Maintenance Procedures For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


8. Troubleshooting Guide For Detroit Diesel V71 Engines 6V71, 8V71, 12V71, 16V71


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Practical Guide To Servicing Your Detroit Diesel V71 Engine

Detroit Diesel 6V71, 8V71, 12V71, 16V71 Engine Tune Up

June 30, 2022

Guide To Engine Tune Up Your 71 V Series Engine Engine


Use new valve rocker cover gaskets after the tune-up is completed.


Tune Up Sequence for Mechanical Governor


Adjust the exhaust valves.


Time the fuel injectors.


Adjust the governor gap.


Position the injector rack control levers.


Adjust the maximum no-load speed.


Adjust the idle speed.


Adjust the Belleville spring for “TT” horsepower.


Adjust the buffer screw.


Adjust the throttle booster spring.


Adjust the supplementary governing device if used.


Exhaust Valve Clearance Adjustment


Engines With Four Valve Cylinder Heads


Valve Clearance Adjustment (Cold Engine)


Valve Clearance Adjustment (Hot Engine)


Check Exhaust Valve Clearance Adjustment


Fuel Injector Timing


Time Fuel Injector



Variable Speed Mechanical Governor And Injector Rack Control Adjustment


6V71,8V71, AND 12V71 Engines


Adjust Governor Gap


Position Injector Rack Control Levers


One Screw and Locknut Assembly


Two Screw Assembly


One Screw and Locknut Assembly


Final Verification & Adjustment


Adjust Maximum No-Load Speed


Adjust Idle Speed


Adjust Buffer Screw


Adjust Booster Spring


Variable Speed Mechanical Governor & Injector Rack Control Adjustment (16V71 Engines)


Governor Gap & Injector Rack Control Adjustment


Position Injector Rack Control Levers


Verify Proper Rack Adjustment


Injector Rack Adjustment


 Correcting a Tight Setting


Adjusting No. 5R & 4L Injector Racks


Adjusting Remaining Right Front Bank Injectors

Verification & Final Adjustments


Final Injector Rack Adjustment & Safety Check


Adjust Maximum No-Load


Governor & Idle Speed Adjustment


Set Maximum No-Load Speed


Adjust Idle Speed


Adjust Buffer Screw


Adjust Booster Spring


Disclaimer


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Detroit Diesel 6V71,  8V71, 12V71, 16V71 Engine Tune Up