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

Detroit Diesel 6V92, 8V92, 12V92, 16V92 Engine Tune Up

June 28, 2022

Guide To Tuning Up Your Detroit Diesel 92 Series Engine


Tune-Up Sequence for Mechanical Governor


Tune-Up Sequence For Hydraulic Governor


Detroit Diesel service, repair manual for 6V92, 8V92, 12V92, 16V92


Exhaust Valve Clearance Adjustment For Your 92 Series Engine


 


 


Valve Clearance Adjustment (Cold Engine)


Valve Clearance Adjustment (Hot Engine)


Fuel Injector Timing


Variable Speed Mechanical Governor And Injector Rack Control Adjustment


Position Injector Rack Control Levers


Adjust Idle Speed


Adjust Booster Spring


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Detroit Diesel 6V92, 8V92, 12V92, 16V92  Engine Tune Up