🔍 Key Concepts

• How lubricating oil actually gets into the combustion space of a diesel engine • The effect of valve guides and piston rings on oil control • Difference between oil flow problems vs. oil consumption problems

💭 Think About

• Which parts of the engine separate the crankcase oil from the combustion chamber, and what happens when they are worn or loose? • Do clogged pipes, high viscosity, or low temperature usually make oil burn more, or do they tend to restrict flow? • Which option would most likely allow more oil than normal to pass into areas where it can be burned with the fuel?

✅ Before You Answer

• Focus on conditions that let oil enter the cylinders and be burned, not just reduce circulation • Ask whether the choice would cause increased flow or leakage past clearances, rather than thicker/slower oil • Consider which component, when worn, directly affects oil control around moving parts exposed to combustion gases