Inspect, Check, Troubleshoot, and Repair Engine Exhaust, Heat Exchangers, and Turbocharger Systems.

Question 1

How does a leak appear in an engine exhaust system?

Answer 1

It normally looks like a gray or black feather-shaped streak coming from a crack or from a location where components are not in perfect alignment.

Question 2

How can you check an exhaust system for leaks?

Answer 2

Pressurize the exhaust system with the discharge from a vacuum cleaner and wipe a soap solution over all joints and suspect areas. A leak will cause bubbles form.

Question 3

How do the components in the exhaust system of a turbocharged engine allow for expansion and contraction due to heat, and at the same time prevent leakage?

Answer 3

Bellows and ball joints prevent leakage while allowing contraction and expansion.

Question 4

What type of damage is most common in the exhaust system of a reciprocating engine?

Answer 4

Cracks caused by expansion and contraction.

Question 5

Should a turbocharged engine be started with the waste gate open or closed?

Answer 5

Open, so as much exhaust as possible will bypass the turbine.