<human>: My car has been having trouble lately. I've heard that if I have a blown head gasket, I'll need to have the engine rebuilt. Is this true?
<bot>: Yes, it is true. If you have a blown head gasket, then you will need to have your engine rebuilt. This means that the engine will be taken apart and inspected for any damage, and then reassembled with new parts. The entire process can take several hours and cost thousands of dollars.