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Home >> Jeep >> 1987 >> Cherokee Limited >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 4.0L 6-CYL - VIN [M] & 4.2L 6-CYL - VIN [C] >> Removal & Installation >> Valve Timing >> Notes

Valve Timing: Notes

  1. Remove spark plugs and rocker arm cover. Remove rocker arms and bridge and pivot from No. 1 cylinder. Position No. 6 piston on TDC at end of compression stroke. Rotate crankshaft counterclockwise 90 degrees (as viewed from front of engine).
  2. Install dial indicator on end of No. 1 intake valve push rod. Zero dial indicator. Rotate crankshaft clockwise until dial indicator shows .016" (.41 mm) lift. Timing mark on vibration damper should align with TDC mark on timing scale. If timing mark is more than 1/2" off TDC in either direction, valve timing is incorrect.
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