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Home >> Mercedes Benz >> 1979 >> 6.9 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 6.9 Liter V8 >> Valves >> Valve Guide Servicing

Valve Guide Servicing

  1. Clean valve guide and remove all hard carbon. Using suitable go no-go plug gauges, check valve guide clearance. Drift out old guide using a suitable drift. Check bore in cylinder head and ream to oversize if necessary.
  2. Heat cylinder head to 176-194°F (80-90°C) and chill valve guide. Drive valve guide in until lock ring is seated against cylinder head. Allow cylinder head to cool and check guide fit in head.
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