When inspecting valve guides for wear, a technician uses a dial indicator to measure valve stem-to-guide clearance. If the measured clearance is 0.005 inch (0.127 mm), what should the technician do?
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✓ Correct answer: B. Replace or recondition the valve guidesExcessive valve stem-to-guide clearance (typically over 0.003-0.004 inch depending on the engine) indicates worn valve guides that need replacement or reconditioning. This excessive clearance can cause oil consumption, valve stem breakage, and poor engine performance.
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