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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 automatic transmission torque converter

  1. Remove the engine assembly. The torque converter bolts are not accessible with the engine installed to the transmission.
  2. Rotate the crankshaft at the pulley.

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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