Seized accessory drive system component

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

Hydraulically locked cylinder

1. Remove spark plugs and check for fluid.
2. Inspect for broken head gasket or gaskets.
3. Inspect for cracked engine block or cylinder head.
4. Inspect for a sticking fuel injector and/or leaking fuel regulator.

Seized automatic transmission torque converter

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

Broken timing chain and/or timing chain gears

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

Material in cylinder

1. Inspect cylinder for damaged components and/or foreign materials.
2. Repair or replace as required.

Seized crankshaft or connecting rod bearings

1. Inspect crankshaft and connecting rod bearings.
2. 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.