LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Mechanical - 1.8L (LKN)) >> Repair Instructions - Off Vehicle >> Crankshaft and Bearing Cleaning and Inspection >> Check Crankshaft Bearing Clearance (With Plastigage)

Check Crankshaft Bearing Clearance (With Plastigage)

WARNING: This page is about a different variant/trim than selected.
  1. Install crankshaft with the 5 upper crankshaft bearing shells at the engine block.
  2. Lay on 5 times plastigage (flexible plastic thread) axially over the entire width of the crankshaft bearing journal (1).
    Fig 1: Plastigage
    GM2191868Courtesy of GENERAL MOTORS COMPANY
    NOTE: Do not rotate the crankshaft.
  3. Install the 5 lower crankshaft bearing shells.
  4. Install the lower crankcase (1).
    Fig 2: Lower Crankcase Bolts
    GM3213146Courtesy of GENERAL MOTORS COMPANY
  5. Install the 10 lower crankcase bolts (2).
    NOTE: Use the old bolts for this step.
  6. Tighten the 10 lower crankshaft bolts in the sequence as shown, use the EN-45059  meter.
    Fig 3: Lower Crankshaft Bolt Tightening Sequence
    GM3213144Courtesy of GENERAL MOTORS COMPANY
    CAUTION: Refer to Fastener Caution .
    CAUTION: Refer to Torque-to-Yield Fastener Caution .
    1. First pass tighten to 50 N.m (37 lb ft).
    2. Second pass to 120 degrees.
  7. Install the 2 long lower crankcase bolts (1) and tighten to 25 N.m (18 lb ft).
    Fig 4: Lower Crankcase Bolts
    GM3213085Courtesy of GENERAL MOTORS COMPANY
  8. Install the 8 short lower crankcase bolts (2) and tighten to 25 N.m (18 lb ft).
  9. Remove the crankcase.
  10. Remove the 2 long lower crankcase bolts (1).
    Fig 5: Lower Crankcase Bolts
    GM3213085Courtesy of GENERAL MOTORS COMPANY
  11. Remove the 8 short lower crankcase bolts (2).
  12. Loosen the 10 lower crankcase bolts in the sequence as shown.
    Fig 6: Lower Crankcase Bolt Loosening Sequence
    GM3213140Courtesy of GENERAL MOTORS COMPANY
  13. Remove and DISCARD the 10 lower crankcase bolts (2).
    Fig 7: Lower Crankcase Bolts
    GM3213146Courtesy of GENERAL MOTORS COMPANY
  14. Loose the lower crankcase (1) from the engine block, use a suitable tool.
  15. Remove the lower crankcase (1).
  16. Measure the crankshaft bearing play.
    Fig 8: Measuring Plastigage
    GM2191869Courtesy of GENERAL MOTORS COMPANY
    NOTE: When reading the value, do not confuse millimeters and inches on the measuring scale.
    • Compare the width of the flattened plastic thread (1) to the measuring scale (2).
    • Permissible crankshaft bearing play, refer to Engine Mechanical Specifications .
scientia non olet · About LEMON Manuals