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Home >> GMC >> 2016 >> Terrain SL, Gas >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Mechanical - 3.6L (LFX) - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Crankshaft and Bearing Installation >> Crankshaft Bearing Clearance Measurement Procedure

Crankshaft Bearing Clearance Measurement Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Front Main Bearing Cap Marks
    GM1553593Courtesy of GENERAL MOTORS COMPANY
  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: Crankshaft Main Bearing Caps
    GM902745Courtesy of GENERAL MOTORS COMPANY
  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: Crankshaft Main Bearing Cap Side Bolts
    GM902789Courtesy of GENERAL MOTORS COMPANY
  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: Setting Crankshaft Main Bearing Caps
    GM1553597Courtesy of GENERAL MOTORS COMPANY
  8. Tap the crankshaft main bearing caps with a soft-faced hammer.
    9. Fig 5: Crankshaft Main Bearing Inboard Bolt Tightening Sequence
    GM1553599Courtesy of GENERAL MOTORS COMPANY
  9. Tighten the main caps bolts using the EN 45059  meter in the following sequence:
    10. CAUTION:

    Refer to Fastener Caution .

  10. Tighten the inboard bolts (1-8) first, in two passes.
    1. Tighten the inboard bolts to 20 N.m (15 lb ft) on the first pass.
    2. Tighten the inboard bolts (1-8) an additional 80 degrees on the 2nd pass.
    11. Fig 6: Outboard Crankshaft Main Bearing Bolt Tightening Sequence
    GM1553600Courtesy of GENERAL MOTORS COMPANY
  11. Tighten the outboard bolts (9-16) second, in two passes.
    1. Tighten the outboard bolts to 15 N.m (11 lb ft) on the first pass.
    2. Tighten the outboard bolts (9-16) an additional 110 degrees on the 2nd pass.
    12. Fig 7: Short/Inner Main Bearing Bolts And Long/Outer Bolts Tightening Sequence
    GM1553602Courtesy of GENERAL MOTORS COMPANY
  12. Tighten the short/inner bolts (17-20) third, in two passes.
    1. Tighten the short/inner bolts to 30 N.m (22 lb ft) on the first pass.
    2. Tighten the short/inner bolts (17-20) an additional 60 degrees on the 2nd pass.
  13. Tighten the long/outer bolts (21-24) fourth, in two passes.
    1. Tighten the long/outer bolts to 30 N.m (22 lb ft) on the first pass.
    2. Tighten the long/outer bolts (21-24) an additional 60 degrees on the 2nd pass.
    14. NOTE:

    Do not rotate the crankshaft.

  14. After reaching final torque, allow the assembly to sit for 2 minutes.
    15. Fig 8: Crankshaft Main Bearing Cap Side Bolts
    GM902789Courtesy of GENERAL MOTORS COMPANY
  15. Remove the crankshaft bearing cap side bolts.
    16. Fig 9: Crankshaft Main Bearing Caps
    GM902745Courtesy of GENERAL MOTORS COMPANY
  16. Remove the crankshaft bearing cap outer bolts.
  17. Remove the crankshaft bearing cap inner bolts.
  18. Remove the crankshaft bearing caps using the GE 6125-1B  adapter and EN 49102  remover.
    19. Fig 10: Measuring Plastigage
    GM54236Courtesy of GENERAL MOTORS COMPANY
  19. 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.
    20. NOTE:

    The crankshaft bearings CAN be reused after checking the clearance if the bearings have never been used in a running engine.

  20. 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.
  21. Clean the plastic gaging material from the crankshaft bearing journals with a soft, lint-free cloth.
    22. Fig 11: Crankshaft
    GM902743Courtesy of GENERAL MOTORS COMPANY
  22. Lift the crankshaft out of the cylinder block.
    23. Fig 12: Prelubing Upper & Lower Bearing Surfaces
    GM1553604Courtesy of GENERAL MOTORS COMPANY
  23. Apply a liberal amount of crankshaft prelube or clean engine oil to the upper and lower bearing surfaces. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended lubricant.
    24. Fig 13: Crankshaft
    GM902743Courtesy of GENERAL MOTORS COMPANY
  24. Gently lower the crankshaft into position in the cylinder block.
    25. Fig 14: Front Main Bearing Cap Marks
    GM1553593Courtesy of GENERAL MOTORS COMPANY
  25. 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.
    26. Fig 15: Crankshaft Main Bearing Caps
    GM902745Courtesy of GENERAL MOTORS COMPANY
  26. Install the crankshaft main bearing caps.
    27. CAUTION:

    This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

  27. Loosely install the NEW inner main cap bolts.
  28. Loosely install the NEW outer main cap bolts.
    29. Fig 16: Setting Crankshaft Main Bearing Caps
    GM1553597Courtesy of GENERAL MOTORS COMPANY
  29. Tap the crankshaft main bearing caps with a soft-faced hammer.
    30. Fig 17: Crankshaft Main Bearing Cap Side Bolts
    GM902789Courtesy of GENERAL MOTORS COMPANY
  30. Loosely install the NEW short/inner side main cap bolts.
  31. Loosely install the NEW long/outer side main cap bolts.
    32. Fig 18: Crankshaft Main Bearing Inboard Bolt Tightening Sequence
    GM1553599Courtesy of GENERAL MOTORS COMPANY
  32. Tighten the main cap bolts using the EN 45059  meter in the following sequence:
  33. Tighten the inboard bolts (1-8) first, in two passes.
    1. Tighten the inboard bolts to 20 N.m (15 lb ft) on the first pass.
    2. Tighten the inboard bolts (1-8) an additional 80 degrees on the 2nd pass.
    34. Fig 19: Outboard Crankshaft Main Bearing Bolt Tightening Sequence
    GM1553600Courtesy of GENERAL MOTORS COMPANY
  34. Tighten the outboard bolts (9-16) second, in two passes.
    1. Tighten the outboard bolts to 15 N.m (11 lb ft) on the first pass.
    2. Tighten the outboard bolts (9-16) an additional 110 degrees on the 2nd pass.
    35. Fig 20: Short/Inner Main Bearing Bolts And Long/Outer Bolts Tightening Sequence
    GM1553602Courtesy of GENERAL MOTORS COMPANY
  35. Tighten the short/inner bolts (17-20) third, in two passes.
    1. Tighten the short/inner bolts to 30 N.m (22 lb ft) on the first pass.
    2. Tighten the short/inner bolts (17-20) an additional 60 degrees on the 2nd pass.
  36. Tighten the long/outer bolts (21-24) fourth, in two passes.
    1. Tighten the long/outer bolts to 30 N.m (22 lb ft) on the first pass.
    2. Tighten the long/outer bolts (21-24) an additional 60 degrees on the 2nd pass.
  37. Ensure that the crankshaft turns without binding or noise.
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