Which of the following conditions can cause...

Question 1 / 270705eccefa3bacbc34ba4d47de2

Question 1 of 270705eccefa3bacbc34ba4d47de2

Which of the following conditions can cause oil to accumulate in the cooling system of a diesel engine?

Question 1 of 27070

Which of the following conditions can cause oil to accumulate in the cooling system of a diesel engine?

🔍 Key Concepts

• Diesel engine lube oil system vs cooling water system – how these two systems are normally kept separate • Oil cooler / heat exchanger construction – tubes, shell, and where oil and water flow • Pressure relationships – which fluid is normally at higher pressure, oil or cooling water?

💭 Think About

• Ask yourself: Which option would create a pathway for oil to physically leak into the cooling system, rather than just increasing the amount of oil in the engine? • For each choice, decide: Does this condition actually connect the lube oil and cooling systems, or does it only change quantity/pressure inside the lube system itself? • Think about how a tube or core failure in a cooler would affect where oil can go when its pressure is higher than cooling water pressure.

✅ Before You Answer

• Verify which component directly interfaces between lube oil and cooling water in a diesel engine (usually the oil cooler). • Check which of the listed conditions would allow oil and water to mix across a barrier rather than just build up more oil in the crankcase or lubrication passages. • Confirm that increasing oil quantity or pressure alone cannot move oil into the cooling system without a leak path between the two systems.

Question 1 of 27070

Which of the following conditions can cause oil to accumulate in the cooling system of a diesel engine?

Excessive valve train lubrication.

Defective oil cooler core.

Excessive lube oil pressure.

Overfilled lube oil system.

Question 1 / 270705eccefa3bacbc34ba4d47de2

Question 1 of 270705eccefa3bacbc34ba4d47de2

Which of the following conditions can cause oil to accumulate in the cooling system of a diesel engine?

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Question 1 of 27070

Which of the following conditions can cause oil to accumulate in the cooling system of a diesel engine?