🔍 Key Concepts

• Relationship between exhaust system leaks and where water will appear (turbo-charger casing drain vs. cylinder indicator valve) • How starting air systems connect (or don’t connect) to the exhaust system and cylinder indicator valves • Path water would follow from a leak in an exhaust or valve cage area into both the turbo-charger drain and a single cylinder

💭 Think About

• Trace the route of exhaust gases and any water from the cylinder, through the exhaust valve, to the turbo-charger exhaust casing. Where could a leak allow water into both places? • Ask yourself: would a leak in the air side (inlet or starting air) logically cause water to show up in the exhaust drain and a cylinder indicator valve? Why or why not? • Consider which of the listed components are on the exhaust side versus the air/charge side, and how many cylinders would likely be affected by each type of leak.

✅ Before You Answer

• Identify whether each option is on the air (inlet/start) side or exhaust side of the engine • Decide which fault would most likely affect one specific cylinder and the turbo-charger exhaust drain at the same time • Verify that the option you’re leaning toward can realistically allow water (not just air) to pass into both the cylinder and the exhaust casing