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Engine Will Not Crank - Crankshaft Will Not Rotate

Cause

Correction

Seized accessory drive system component

  1. Inspect the accessory drive system components.
  2. Repair or replace all damaged components.

Hydraulically locked cylinder

    •  Coolant/antifreeze in cylinder
    •  Oil in cylinder
    •  Fuel in cylinder
  1. Inspect for broken head gasket(s).
  2. Inspect for cracked engine block or cylinder head.
  3. Inspect for a sticking fuel injector.

Seized manual gearbox

  1. Disengage the clutch.
  2. Rotate crankshaft at the pulley.

Material in cylinder

    • Broken valve
    • Piston material
    • Foreign material
    • Inspect the cylinder for damaged components and/or foreign materials.
    • Repair or replace as required.

Seized crankshaft or big end bearing

    • Inspect the crankshaft and big end bearings.
    • Repair as required.

Bent or broken connecting rod

    • Inspect the connecting rods
    • Repair as required.

Broken crankshaft

    • Inspect the crankshaft.
    • Repair as required.
   


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