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Valve Guides Service

  1. If valve-to-guide clearance is excessive, drive out guide toward combustion chamber side of head. Check size of valve guide bore in cylinder head. Valve guide bore diameter should be equal to guide outside diameter.
  2. Valve guides are available in 3 oversizes. Oversize diameters are .555" (14.1 mm), .559" (14.2 mm) and .563" (14.3 mm). When installing guide, heat cylinder head to 122°F (50°C). Using Liquid Nitrogen, chill valve guide to about -238°F (-150°C).
  3. Drive guide into cylinder head from top. Stepped end of valve guide must face camshaft installed guide. Guide height is .513" (13.5 mm). Ream valve guide for correct oil clearance.
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