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Engine Will Not Crank - Crankshaft Will Not Rotate - LE5 or LE9

Cause

Correction

Seized accessory drive system component

  1. Remove accessory drive belts.
  2. Rotate crankshaft by hand at the balancer or flywheel location.

Hydraulically locked cylinder

    • Coolant/antifreeze in cylinder
    • Oil in cylinder
    • Fuel in cylinder
  1. Remove spark plugs and check for fluid.
  2. Inspect for broken head gasket.
  3. Inspect for cracked engine block or cylinder head.
  4. Inspect for a sticking fuel injector.
  5. Inspect for cracked cylinder wall.

Seized automatic transmission torque converter

  1. Remove the torque converter bolts.
  2. Rotate crankshaft by hand at the balancer or flywheel location.

Seized manual gearbox

  1. Disengage the clutch.
  2. Rotate crankshaft by hand at the balancer or flywheel location.

Broken timing chain and/or gears

  1. Inspect timing chain and gears.
  2. Repair as required.

Seized balance shaft

  1. Inspect balance shaft.
  2. Repair as required.

Material in cylinder

    • Broken valve
    • Piston material
    • Foreign material
    • Cracked cylinder wall
  1. Inspect cylinder for damaged components and/or foreign materials.
  2. Inspect for fallen cylinder wall.
  3. Repair or replace as required.

Seized crankshaft or big end bearings

  1. Inspect crankshaft and big end bearings.
  2. Inspect for fallen cylinder wall.
  3. Repair as required.

Bent or broken connecting rod

  1. Inspect connecting rods.
  2. Repair as required.

Broken crankshaft

  1. Inspect crankshaft.
  2. Repair as required.
   


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