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Crankshaft Pulley Flew Off

Crankshaft Pulley and Bolt got dislodge from Civic 1997 Engine

Hi Scotty,

Early this morning I started my car and the Crankshaft Pulley in my engine got dislodged/disconnected from the engine. Not knowing that it was dislodged, I drove it for about 10 meters back to its parking place. When I checked the pulley I saw that the thread in the center hole are already worn out. Even the bolt's thread are also worn out and needs to be replaced.

What could possibly be the damage to my engine and how can this be fixed? Apart from pulley and bolt, are there any other parts that I need to check and replace?

Thanks in advance...

pray the crank itself is not damaged or engine will need replacing. The crank is not repairable if the end is broken

How can I know if the crank is damaged or not? Also, if the crank is damaged, can it just be replaced instead of replacing the whole engine?