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Whats the tourqe on head bolts 1990 4 cylinder

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  • Jeep Master
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1990–95 VEHICLES

  1. Disconnect the battery ground.
  2. Drain the cooling system. CAUTION
    When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old.
  3. Disconnect the hoses at the thermostat housing.
  4. Remove the air cleaner.
  5. Remove the rocker arm cover as outlined earlier in this section.
  6. Remove the rocker arms. Keep them in order!
  7. Remove the pushrods. Keep them in order!
  8. Remove the power steering pump bracket.
  9. Suspend the pump out of the way.
  10. Remove the intake and exhaust manifolds.
  11. Remove the air conditioning compressor drive belt.
  12. Loosen the alternator drive belt.
  13. Remove the compressor/alternator bracket mounting bolt.
  14. Unbolt the compressor and suspend it out of the way. DO NOT DISCONNECT THE REFRIGERANT LINES!
  15. Remove the spark plugs.
  16. Disconnect the temperature sending unit wire. Fig. 6: Disconnect the coolant hoses at the thermostat housing whats the tourqe on head bolts 1990 4 cylinder - 85353100.jpg
    Fig. 7: Disconnect the coolant hoses at the thermostat housing 85353101.jpg
    Fig. 8: Remove the cylinderwhats the tourqe on head bolts 1990 4 cylinder - 85353102.jpgto–block bolts 85353102.jpg
    Fig. 9: Cylinder head bolt removed from the head 85353103.jpg
    Fig. 10: Removing the cylinder head from the engine block 85353104.jpg

  17. Remove the head bolts.
  18. Lift the head off the engine and place it on a clean workbench.
  19. Remove the head gasket. To install:
  20. Thoroughly clean the gasket mating surfaces. Remove all traces of old gasket material. Remove all carbon deposits from the combustion chambers. Lay a straightedge across the head and check for flatness. Total deviation should not exceed 0.001 in. (0.025mm). NOTE: The cylinder head gasket used on the 2.5L engine is a composition gasket. The gasket is to be installed dry. Do not use gasket sealing compound on the gasket.
  21. Fabricate 2 cylinder head alignment dowels from 2 used cylinder head bolts. Cut the head of the longest bolt off below the hex head. Then cut a slot in the top of the dowel to allow easier removal with a screwdriver.
  22. Install one dowel in bolt hole No. 10 and the other dowel in bolt hole No. 8.
  23. Place the cylinder head gasket over the dowels with the numbers facing up.
  24. Place the cylinder head over the dowels.
  25. Coat the threads of bolt No. 7 only, with Loctite PST sealant or equivalent.
  26. Install all head bolts except Nos. 8 and 10.
  27. Tighten the bolts in the sequence shown in the illustration to the following:
    1. Tighten bolts 1 through 10 in sequence to 22 ft. lbs. (30 Nm).
    2. Tighten bolts 1 through 10 in sequence to 45 ft. lbs. (61 Nm).
    3. Recheck bolts 1 through 10 in sequence to verify that they are 45 ft. lbs. (61 Nm).
    4. Tighten bolts 1 through 6 in sequence to 110 ft. lbs. (149 Nm).
    5. Tighten bolt 7 to 100 ft. lbs. (136 Nm).
    6. Tighten bolts 8 through 10 to 110 ft. lbs. (149 Nm). NOTE: During the final tightening sequence, bolt No. 7 will be tightened to a lower torque than the rest of the bolts. Do not overtighten bolt No. 7.
  28. Connect the temperature sending unit wire.
  29. Install the spark plugs.
  30. Install the compressor.
  31. Install the compressor/alternator bracket mounting bolt.
  32. Adjust the alternator drive belt.
  33. Install the air conditioning compressor drive belt.
  34. Install the intake and exhaust manifolds.
  35. Install the power steering pump bracket.
  36. Install the pushrods. Keep them in order!
  37. Install the rocker arms. Keep them in order!
  38. Thoroughly clean the mating surfaces of the head and rocker cover and install as outlined earlier in this section.
  39. Install the air cleaner.
  40. Connect the hoses at the thermostat housing.
  41. Connect the battery ground.
  42. Fill the cooling system.

Posted on Jul 08, 2010

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5c04c01.jpg


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9fb545e.jpg

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