According to the illustration, if water is...

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Question 1 of 205eccefa2bacbc34ba4d47a13

According to the illustration, if water is ejected from an open indicator cock when the engine is rotated by the turning motor, a leak or crack may have developed at the __________. See illustration MO-0032.

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🔍 Key Concepts

• indicator cock purpose on a diesel engine cylinder head • relationship between the cooling water spaces and the combustion space in the illustration • how cracks at the injector seat, valve seat insert, or upper cylinder liner could allow jacket water to enter the cylinder

💭 Think About

• Trace on the illustration where the cooling water passages run in relation to the injector, valve seats, and top of the liner. Which of these parts form a boundary between water space and combustion space? • If water is coming out of the indicator cock during slow turning, from what general system must that water be leaking, and through what kind of defect would it reach the cylinder? • Ask yourself: is there any listed location that, if cracked, would not give water a direct path into the combustion space shown in the illustration?

✅ Before You Answer

• Confirm which components in the picture are surrounded by jacket water and also form part of the gas-tight boundary of the combustion chamber. • Verify whether each option (injector seating surface, valve seat insert, upper portion of cylinder liner) could, if cracked, connect cooling water space to the inside of the cylinder. • Eliminate any option that is not in contact with both cooling water and the combustion space in the illustration.

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