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Home >> Jeep >> 1988 >> Comanche Eliminator, Automatic >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 4.0L 6-CYL - VIN [M] & 4.2L 6-CYL - VIN [C] >> Removal & Installation >> Cylinder Head >> Installation

Cylinder Head: Installation

  1. Ensure all gasket surfaces are clean. Clean carbon from combustion chambers and tops of pistons. Apply sealant to both sides of new cylinder head gasket. Install new gasket with the word "TOP" upward. Ensure all holes are aligned.
  2. Install cylinder head. Apply sealing compound to threads of cylinder head bolt No. 11 prior to installation. See Fig 1. Install head bolts.
  3. Tighten all bolts in sequence (except No. 11) to 110 ft. lbs. (149 N.m) on 4.0L or 85 ft. lbs. (115 N.m) on 4.2L models. Tighten No. 11 head bolt to 100 ft. lbs. (136 N.m) on 4.0L or 75 ft. lbs. (136 N.m) on 4.2L. See Fig 1.
  4. Reverse removal procedure for remaining components. Install valve cover and new gasket. Tighten bolts to specification.
  5. Refill and purge cooling system. See COOLING SYSTEM AIR PURGE under WATER PUMP  in this article.
Fig 1: Cylinder Head Bolt Tightening Sequence
G91238Courtesy of CHRYSLER MOTORS.
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