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Home >> Infiniti >> 1992 >> G20 Automatic >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 2.0L 4-CYL - VIN [C] >> Overhaul >> Valve Guides

Valve Guides

  1. Check valve stem-to-valve guide clearance. See CYLINDER HEAD  table under ENGINE SPECIFICATIONS. Ensure valve stem diameter is within specification. Valve guide can be replaced if clearance exceeds specification.
  2. To replace valve guide, heat cylinder head to 230-266°F(110-130°C). Using hammer and drift, drive valve guide from combustion side of cylinder head. Using reamer, ream cylinder head valve guide bore to .4006-.4014" (10.175-10.196 mm).
  3. Heat cylinder head to 230-266°F (110-130°C). Press valve guide in cylinder head until valve guide installed height is within specification. See Fig 1 . Using reamer, ream valve guide bore to .2362-.2369" (5.999-6.018 mm).
Fig 1: Installing Valve Guide
G92H00452Courtesy of NISSAN MOTOR CO., U.S.A.
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