Audio-Visual Resources:

• Slides:  60

• Video:  56 minutes

Approximate length: 4 hours

CAAT Seal or Certificate available upon following quality assurance standards

Learn to diagnose compression related driveability problems by “Idle and Snap” compression testing. Understand how valve timing affects compression. Interpret vacuum readings to save time diagnosing mechanical problems. Fully understand backpressure testing and become familiar with the most accurate method. Be able to verify camshaft integrity and understand volumetric efficiency. Accurately diagnose and repair a ping problem.

• Importance of compression in the combustion process

  • Principles of thermodynamics

  • Temperature and pressure multiplication during compression

  • Power production / engine efficiency

  • Compression pressure vs. combustion pressure

• Mechanical factors contributing to compression

  • Cylinder seal components. cam / valve timing, valve overlap

  • Volume flow vs. time

  • Volumetric efficiency and its effect on compression pressure

• Multivalve engine theory
• Turbochargers, function and operation