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Valve Guides

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NOTE: Valve stem diameter must be within specifications before checking valve stem to valve guide clearance. If necessary, use a magnetic base.
  1. Using the Dial Indicator with Brackets (100-002, TOOL-4201-C) and Valve Stem Checking Tool (303-004, TOOL-6505-E), check valve stem-to-valve guide oil clearance. Install a valve stem checking tool on the valve stem and install a dial indicator with brackets. See Fig 1.
  2. Lower the valve until the valve stem checking tool contacts the upper surface of the valve guide. Move the valve stem checking tool toward the indicator and zero the indicator. Move the valve stem checking tool away from the indicator and note the reading. The reading will be DOUBLE the valve stem-to-valve guide clearance.
  3. Valves with oversize stems will need to be installed if out of specification. See CYLINDER HEAD  table under ENGINE SPECIFICATIONS.
Fig 1: Measuring Valve Stem-To-Valve Guide Oil Clearance
G00214993Courtesy of FORD MOTOR CO.
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