🔍 Key Concepts

• Relationship between engine load and heat generation in bearings and pistons • How oil flow removes heat from internal engine parts • Effects of mechanical problems like end play or plugged rings on friction and temperature

💭 Think About

• Which condition would most directly cause the engine to produce more heat than the lube oil system can carry away? • Think about what usually causes all temperatures (exhaust, jacket water, lube oil) to rise together in a marine diesel. • Which option is more of a result of temperature problems, versus a likely cause of high oil temperature?

✅ Before You Answer

• Compare which choice most clearly increases overall engine power demand and internal friction, creating more heat. • Ask: if this problem occurred, would I also expect high exhaust temperature and possibly high jacket water temperature? • Eliminate any options that mainly affect pressure readings without necessarily increasing heat production.