Demonstrate a cylinder leakage test.

Demonstration should include

• selecting the tools and equipment needed to remove the spark plugs
• removing the spark plugs
• positioning the piston to top center
• attaching air and setting gauge to zero
• installing the tool cylinder leak down tester and checking the percentage of leakage
• testing all cylinders and recording the percentage of leakage.

Process/Skill Questions: 

• What is the purpose of the cylinder leakage tester?
• What can this test show about the engine?
• What could occur if the piston is not at top center?
• What safety items would be needed to perform the cylinder leakage test?