| Cause | Correction |
|---|---|
| Seized accessory drive system component | Inspect the accessory drive system components. Repair or replace all damaged components. |
| Hydraulically locked cylinder Coolant/antifreeze in cylinder Oil in cylinder Fuel in cylinder | Inspect for broken head gasket(s). Inspect for cracked engine block or cylinder head. Inspect for a sticking fuel injector. |
| Seized automatic transmission torque converter | Remove the engine assembly. The torque converter bolts are not accessible with the engine installed to the transmission. Rotate the crankshaft at the pulley. |
| Seized manual transmission | Disengage the clutch. 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 connecting rod bearing | Inspect the crankshaft and connecting rod bearings. Repair as required. |
| Bent or broken connecting rod | Inspect the connecting rods. Repair as required. |
| Broken crankshaft | Inspect the crankshaft. Repair as required. |
Engine Will Not Crank - Crankshaft Will Not Rotate