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Home >> BMW >> 1971 >> 2800CS Not Available Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> BMW Engines - 2500, 2800, 3.0 & BAVARIA 6 Cylinder >> Valve Guide Servicing

Valve Guide Servicing

  1. With valve removed, check inside diameter of valve guide. If size exceeds specifications, drive guide out through combustion chamber with a suitable driver (No. 609).
  2. Check size of valve guide bore in cylinder head, if size exceeds 0.5591", an oversize guide must be installed. Guides are available in 0.5551", 0.5591" and 0.5630" oversize.
  3. Guides require a 0.0006" to 0.0017" press fit in cylinder head, with head heated to 430-480°F. Ream head accordingly to oversize guide being used.
  4. Using a suitable driver (No. 610), drive guide into cylinder head from top until top of guide protrudes 0.5808". Ream valve guide until correct clearance with valve is obtained.
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