Cylinder Head Machining Valve 'jobs' Valve 'jobs' Grinding seats, valves should be new or refaced Grinding seats, valves should be new or refaced Guides must be in good shape Guides must be in good shape Straight Straight Round Round Not 'bell-mouthed' Not 'bell-mouthed' Must be repaired before grinding/cutting valves Must be repaired before grinding/cutting valves
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