🔍 Key Concepts

• how exhaust gases leave a diesel engine and what happens if that flow is restricted • relationship between exhaust back pressure and engine temperature/performance • symptoms a mechanic might see when an engine cannot ‘breathe’ properly

💭 Think About

• If exhaust ports are partially blocked, what happens to the pressure and temperature in the exhaust manifold? • How would extra back pressure affect how easily the engine turns and develops power? • Would restricted exhaust flow be likely to affect only one part of the engine’s behavior, or multiple related problems at once?

✅ Before You Answer

• Consider whether back pressure can increase both temperature and mechanical load on the engine • Think about what a watchstander would actually observe: temp gauges, exhaust readings, and engine response to throttle • Ask whether the question is pointing toward a single specific symptom or a combination of related symptoms