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Home >> Lincoln >> 1987 >> Mark VII Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 5.0L V8 - VIN [F] & 5.0L Ho V8 - VIN [M] >> Overhaul >> Cylinder Block: Cam Lobe Lift

Cylinder Block: Cam Lobe Lift

  1. Check lift of each camshaft lobe in consecutive order as follows: Remove rocker arms and make sure each push rod is in valve lifter socket. Install dial indicator so ball socket adapter of indicator rests on end of push rod, and in same plane as push rod movement.
  2. Connect auxiliary starter switch to starter solenoid. Turn ignition switch off. "Bump" crankshaft until tappet is on base circle of camshaft lobe. This is push rod's lowest point.
  3. Zero dial indicator and continue to rotate crankshaft until push rod is in fully raised position: highest indicator reading. Compare total lift from indicator readings with specifications.
  4. To check accuracy of dial indicator readings, continue to rotate crankshaft until indicator reads zero. If lift on any lobe is .005" (.13 mm) less than specifications, valve lifters are operating on worn lobes. Replace camshaft and lifters as necessary.
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