LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Engine Mechanical - 3.6L (Ly7) (Repair Procedures -- 4 Of 5)) >> Off-Vehicle Repair Instructions - Part 3 >> Crankshaft and Bearings Installation >> Crankshaft Bearing Clearance Measurement Procedure

Crankshaft Bearing Clearance Measurement Procedure

WARNING: This page is about a different variant/trim than selected.

Tools Required

    Fig 1: Identifying Crankshaft Main Bearing Caps
    GM1553593Courtesy of GENERAL MOTORS CORP.
  1. Place a length of fresh, room temperature plastic gaging material all the way across all the crankshaft bearing journals.
  2. Identify the proper order of the main bearing caps. The main bearing caps are numbered 1 (1) through 4, with the front main bearing cap marked with the number 1. The arrow (2) is to be oriented to the front of the engine.
    3. Fig 2: View Of Crankshaft Main Bearing Caps
    GM902745Courtesy of GENERAL MOTORS CORP.
  3. Install the crankshaft main bearing caps.
  4. Loosely install the original inner main cap bolts.
  5. Loosely install the original outer main cap bolts.
    6. Fig 3: Identifying Crankshaft Main Bearing Cap Side Bolts
    GM902789Courtesy of GENERAL MOTORS CORP.
  6. Loosely install the original short/inner side main cap bolts.
  7. Loosely install the original long/outer side main cap bolts.
    8. Fig 4: Tapping Crankshaft Main Bearing Caps With Soft-Faced Hammer
    GM1553597Courtesy of GENERAL MOTORS CORP.
  8. Tap the crankshaft main bearing caps with a soft-faced hammer.
  9. Tighten the main caps bolts using the J 45059  in the following sequence:
    Fig 5: Identifying Inboard Crankshaft Main Bearing Bolt Tightening Sequence
    GM1553599Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.

    Tighten the inboard bolts (1-8).

    Tighten:  Tighten the inboard bolts (1-8) to 20 N.m (15 lb ft) plus 80 degrees.

    10. Fig 6: Identifying Outboard Crankshaft Main Bearing Bolt Tightening Sequence
    GM1553600Courtesy of GENERAL MOTORS CORP.
  10. Tighten the outboard bolts (9-16).

    Tighten:  Tighten the outboard bolts (9-16) to 15 N.m (11 lb ft) plus 110 degrees.

    11. Fig 7: Identifying Short/Inner Crankshaft Main Bearing Bolt Tightening Sequence
    GM1553602Courtesy of GENERAL MOTORS CORP.
  11. Tighten the short/inner bolts (17-20).

    Tighten:  Tighten the short/inner bolts (17-20) to 30 N.m (22 lb ft) plus 60 degrees.

  12. Tighten the long/outer bolts (21-24).

    Tighten:  Tighten the long/outer bolts (21-24) to 30 N.m (22 lb ft) plus 60 degrees.

    13. IMPORTANT: Do not rotate the crankshaft.
  13. After reaching final torque, allow the assembly to sit for 2 minutes.
    14. Fig 8: Identifying Crankshaft Main Bearing Cap Side Bolts
    GM902789Courtesy of GENERAL MOTORS CORP.
  14. Remove the crankshaft bearing cap side bolts.
    15. Fig 9: View Of Crankshaft Main Bearing Caps
    GM902745Courtesy of GENERAL MOTORS CORP.
  15. Remove the crankshaft bearing cap outer bolts.
  16. Remove the crankshaft bearing cap inner bolts.
  17. Remove the crankshaft bearing caps using the J 6125-1B  and J 41818  .
    18. Fig 10: Measuring Plastigage
    GM54236Courtesy of GENERAL MOTORS CORP.
  18. Determine the crankshaft bearing clearance by comparing the width of the flattened plastic gaging material at its widest point with the graduation on the gaging material container.
    19. IMPORTANT: The crankshaft bearings CAN be reused after checking the clearance if the bearings have never been used in a running engine.
  19. Compare your measurements with the Engine Mechanical Specifications . If the new bearings do not provide the proper crankshaft to bearing clearance, inspect the following:
    1. Re-measure the crankshaft journals for the correct specified size and ensure the proper new bearings are being installed. If the crankshaft journals are incorrectly sized, replace or regrind the crankshaft. Crankshaft machining is permitted and undersized bearings are available.
    2. Re-measure the engine block crankshaft bearing bore diameter to ensure proper size. The engine block crankshaft bearing bore is not machinable and the block must be replaced if out of specification.
  20. Clean the plastic gaging material from the crankshaft bearing journals with a soft, lint-free cloth.
    21. Fig 11: View Of Crankshaft
    GM902743Courtesy of GENERAL MOTORS CORP.
  21. Lift the crankshaft out of the cylinder block.
    22. Fig 12: Applying Crankshaft Prelube Or Clean Engine Oil To Upper & Lower Bearing Surfaces
    GM1553604Courtesy of GENERAL MOTORS CORP.
  22. Apply a liberal amount of crankshaft prelube GM P/N 1052367 (Canadian P/N 992869) or clean engine oil GM P/N 12345501 (Canadian P/N 992704) to the upper and lower bearing surfaces.
    23. Fig 13: View Of Crankshaft
    GM902743Courtesy of GENERAL MOTORS CORP.
  23. Gently lower the crankshaft into position in the cylinder block.
    24. Fig 14: Identifying Crankshaft Main Bearing Caps
    GM1553593Courtesy of GENERAL MOTORS CORP.
  24. Identify the proper order of the main bearing caps. The main bearing caps are numbered 1 (1) through 4, with the front main bearing cap marked with the number 1. The arrow (2) is to be oriented to the front of the engine.
    25. Fig 15: View Of Crankshaft Main Bearing Caps
    GM902745Courtesy of GENERAL MOTORS CORP.
  25. Install the crankshaft main bearing caps.
  26. Loosely install the original inner main cap bolts.
  27. Loosely install the NEW outer main cap bolts.
    28. Fig 16: Tapping Crankshaft Main Bearing Caps With Soft-Faced Hammer
    GM1553597Courtesy of GENERAL MOTORS CORP.
  28. Tap the crankshaft main bearing caps with a soft-faced hammer.
    29. Fig 17: Identifying Crankshaft Main Bearing Cap Side Bolts
    GM902789Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The side main cap bolts originally have a sealant on the flange of the bolt head. NEW bolts must be used, if NEW bolts are not used, oil can leak from the crankcase past the bolts.
  29. Loosely install the NEW short/inner side main cap bolts.
  30. Loosely install the NEW long/outer side main cap bolts.
  31. Tighten the main cap bolts using the J 45059  in the following sequence:
    Fig 18: Identifying Crankshaft Main Bearing Inboard Bolt Tightening Sequence
    GM1553599Courtesy of GENERAL MOTORS CORP.

    Tighten the inboard bolts (1-8).

    Tighten:  Tighten the inboard bolts (1-8) to 20 N.m (15 lb ft) plus 80 degrees.

    32. Fig 19: Identifying Crankshaft Main Bearing Outboard Bolt Tightening Sequence
    GM1553600Courtesy of GENERAL MOTORS CORP.
  32. Tighten the outboard bolts (9-16).

    Tighten:  Tighten the outboard bolts (9-16) to 15 N.m (11 lb ft) plus 110 degrees.

    33. Fig 20: Identifying Crankshaft Main Bearing Short/Inner Bolt Tightening Sequence
    GM1553602Courtesy of GENERAL MOTORS CORP.
  33. Tighten the short/inner bolts (17-20).

    Tighten:  Tighten the short/inner bolts (17-20) to 30 N.m (22 lb ft) plus 60 degrees.

  34. Tighten the long/outer bolts (21-24).

    Tighten:  Tighten the long/outer bolts (21-24) to 30 N.m (22 lb ft) plus 60 degrees.

  35. Ensure that the crankshaft turns without binding or noise.
scientia non olet · About LEMON Manuals