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Home › Saab › 1982 › 900 S, 2D Hatchback, Automatic Trans › Repair and Diagnosis › Engine Performance › Specifications › Tune-Up - 4 CYL › Valve Clearance

Valve Clearance

  1. Run engine until warm and let cool 30 minutes before checking valves. Position cam lobe opposite valve depressor. Install measuring tool (8391450) with dial indicator to valve depressor. With measuring point of dial indicator resting on tip of cam, zero dial indicator.
  2. Lift valve depressor with special tool and note movement of dial indicator indicating present valve clearance. Any valve not within specifications should be adjusted as follows:
  3. Remove camshaft, valve depressors and adjusting pads of valves needing adjustment. Measure thickness of adjusting pad with micrometer and calculate thickness of new pad required to bring valve clearance within specifications.
  4. Measured valve clearance plus adjusting pad thickness equals total distance between valve and cam. This total distance less the specified valve clearance, determines thickness of new adjusting pad to be installed.
  5. Install new adjusting pad, valve depressors, and camshaft and recheck that clearances are correct.
    VALVE CLEARANCE SPECIFICATIONS

    Application Clearance In. (mm)
    900
      Intake .008-.010 (.20-.25)
      Exhaust .016-.018 (.40-.45)
    900 Turbo
      Intake .008-.010 (.20-.25)
      Exhaust .018-.020 (.45-.50)
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