You are doing a compression test and you find low readings in two adjacent cylinders What could be the problem? A. Leaking exhaust manifold gasket B. Burnt valves C. leaking intake manifold gasket D. Leaking cylinder head gasket

The correct answer is D. Leaking cylinder head gasket.<br /><br />When performing a compression test and finding low readings in two adjacent cylinders, it is likely that there is a problem with the cylinder head gasket. The cylinder head gasket is a critical component that seals the cylinder head to the engine block, preventing oil and coolant from leaking into the cylinders. If the gasket is damaged or leaking, it can cause low compression readings in the affected cylinders.<br /><br />Options A, B, and C are not likely to cause low compression readings in two adjacent cylinders. A leaking exhaust manifold gasket (Option A) would not directly affect the compression readings. Burnt valves (Option B) would typically cause low compression readings in individual cylinders rather than adjacent ones. A leaking intake manifold gasket (Option C) would also not directly affect the compression readings in the same way as a leaking cylinder head gasket.<br /><br />Therefore, the most likely cause of low compression readings in two adjacent cylinders is a leaking cylinder head gasket (Option D).