STANDARD COMPETENCIES:

 

 

 1. Demonstrate  knowledge of  the history of General Motors teaming up with Isuzu to revolutionize the medium duty

    diesel engine truck market with the first high pressure common rail injection system.

 2. Distinguish between the LB7, LML, and the 6.7L series engines, and be able to research the service and repair

    procedures required to work on the GM Duramax Engine.

 3. Perform LB7 through LML scheduled service adjustment procedures and engine evaluations.

 4. Conduct engine diagnostics to determine problems and  needed  adjustments or repairs

 5. Recognize the differences between the mechanical Bosch Standyane injection pumps of the older models

    and the high-pressure common-rail fuel injection system.

 6. Perform injection pump inspection, testing.

 7. Identify the differences between Isuzu Duramax injection nozzles and those used on the Cat HEUI system

    and understand their principle operations.

 8. Perform injector performance testing, evaluation, repair and or replacement.

 9. Identify, inspect, test, evaluate and repair glow plug pre-heaters.

 10. Identify, inspect, test, evaluate and repair charge air intercoolers as used on   turbocharged engines.

 11. Identify, inspect, test, evaluate and repair common turbochargers, including the Holset Turbocharger, the Two-Stage

     Variable Turbocharger, and the latest single-sequential Honeywell Turbocharger.

 12. Identify various models of manual and automatic transmissions from first to last production dates.

 

 

 TOPICAL OUTLINE:

 

 

 I. Duramax History and Development

      a. Designs

      b. Applications

      c. Partnership history

      d. Marketing strategy

 II. B Series Engine Identification

      a. Model series

      b. Production years

      c. Rated horsepower by production and model year

      d. Use applications of various models

 III. Scheduled Engine Service and Adjustments

      a. Overhead valve adjustment procedures on power stroke

      b. Inspection and adjustment of injection pump timing

 IV. Engine Performance and Diagnostic Procedures

      a. Cylinder balance test

      b. Wet, dry and leak-down compression test

      c. Injector cut-out test.

      d. Diagnostic fault codes

 V. Fuel Injection Pumps

      a. Model identifications

      b. Pressure specifications and calibration adjustments

      c. Timing specifications and adjustment procedures

      d. Injection pump removal replacement installation procedures

 VI. Fuel Injection Nozzles

      a. Model identifications as related to production year and engine series

      b. Dynamic testing by injector cut-out test and cylinder balance test

      c. Static testing by bench testing poppet pressures and leak test

 VII. Glow Plug Pre-Heaters

      a. Principle usage and purpose

      b. Condition inspection, circuit testing, voltage and amp draw, evaluation, repair, and replacement

 VIII. Intercoolers

      a. Principles and purpose

      b. Inspection, testing for leakage or restrictions

 IX. Turbochargers

      a. Models and sizes as related to production years and rated horse power

      b. Principles and theories of exhaust heat turbine compressors

 X. Manual and Automatic Transmissions

      a. Identification of manual transmissions used in progression of production years and related to rated horse power

      b. Identification of Allison automatic transmissions with their tow haul mode used in progression of production years

         and related to rated horse power