Seized accessory drive system component

1. Remove the accessory drive belts.
2. Confirm that the engine will rotate. Rotate the crankshaft by hand at the crankshaft balancer or flywheel location.
3. Repair or replace the components, as required.

Seized supercharger - 6.2L LS9

1. Remove the accessory drive belt and confirm the pulley of the supercharger will rotate.
2. Repair or replace components as required.

Broken timing chain

1. Inspect the timing chain and sprockets.
2. Repair or replace the components, as required.

Seized timing chain or timing sprockets

1. Inspect the timing chain and sprockets for foreign material or a seized chain.
2. Repair or replace the components, as required.

Seized or broken camshaft

1. Inspect the camshaft and the camshaft bearings.
2. Repair or replace the components, as required.

Bent valve in the cylinder head

1. Inspect the valves and the cylinder heads.
2. Repair or replace the components, as required.

Seized oil pump

1. Inspect the oil pump assembly.
2. Repair or replace, as required.

Hydraulically locked cylinder

1. Remove spark plugs and inspect for fluid in the cylinder. When rotating the engine with the spark plugs removed, the piston, on compression stroke, will push fluid from the combustion chamber. Refer to Coolant in Combustion Chamber.
2. Inspect for failed/broken head gaskets.
3. Inspect for a cracked engine block or cylinder head.
4. Inspect for a sticking fuel injector.
5. Inspect the supercharger intercooler for an internal coolant leak - 6.2L LS9. Refer to Supercharger Assemble.
6. Repair or replace the components, as required.

Material in the cylinder

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

Seized crankshaft or connecting rod bearings

1. Inspect crankshaft and connecting rod bearings.
2. Repair or replace the components, as required.

Bent or broken connecting rod

1. Inspect the connecting rods.
2. Replace the components, as required.

Broken crankshaft

1. Inspect the crankshaft.
2. Repair or replace the components, as required.