Which statement about camshaft placement and the water jackets is correct?

Which statement about camshaft placement and the water jackets is correct?

• A. B only
• B. A only
• C. Neither A nor B
• D. Both A and B

Answer: (A)

Camshaft placement in relation to the engine’s cooling passages is the idea being tested. The camshaft is typically mounted in the cylinder head (or in a head-mounted carrier) and is lubricated by oil, not coolant. The water jackets are built into the head and block to carry coolant around the combustion chambers and surrounding components to remove heat. Importantly, the camshaft bearings and oil passages are sealed from the cooling system so that coolant does not mix with engine oil. In a correct arrangement, the water jackets surround the area where the camshaft sits, but the camshaft itself resides in a bore with seals and oil lubrication, not inside the coolant passages. To explain why the chosen statement is correct, I’d need the exact wording of the two statements. If you share what A and B say, I can tie this general understanding directly to why that option is the right one.

Camshaft placement in relation to the engine’s cooling passages is the idea being tested. The camshaft is typically mounted in the cylinder head (or in a head-mounted carrier) and is lubricated by oil, not coolant. The water jackets are built into the head and block to carry coolant around the combustion chambers and surrounding components to remove heat. Importantly, the camshaft bearings and oil passages are sealed from the cooling system so that coolant does not mix with engine oil. In a correct arrangement, the water jackets surround the area where the camshaft sits, but the camshaft itself resides in a bore with seals and oil lubrication, not inside the coolant passages.

To explain why the chosen statement is correct, I’d need the exact wording of the two statements. If you share what A and B say, I can tie this general understanding directly to why that option is the right one.