🔍 Key Concepts

• diesel engine exhaust valves function and common failure signs • how exhaust temperature differences between cylinders indicate problems • practical vs time‑consuming methods for routine troubleshooting on operating engines

💭 Think About

• Which method lets you compare all cylinders at once while the engine is running under load? • Which option is most sensitive to a single cylinder having a hotter or cooler exhaust flow than the others? • Which methods require stopping, disassembling, or doing detailed setup, and are they usually called the easiest way in an exam context?

✅ Before You Answer

• Identify which choice provides quantitative information for each cylinder’s exhaust condition • Consider which method is non‑intrusive and can be done quickly during normal operation • Eliminate options that require major disassembly or shutdown just to check for a suspect exhaust valve