Which type of cylinder head injector sleeve would be more likely to leak coolant into the engine cylinder?

Name: Which type of cylinder head injector sleeve would be more likely to leak coolant into the engine cylinder?
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Question

Quizplus · Accepted Answer

Copper injector sleeves are more prone to leakage compared to other types because copper is softer and less durable under high temperatures and pressures, leading to a higher likelihood of failure and coolant leakage into the engine cylinder.

Which Type of Cylinder Head Injector Sleeve Would Be More