<human>: What is a blown head gasket and how do you repair it?
<bot>: A blown head gasket is when the metal plates in the engine block that seal the combustion chambers are damaged or cracked. This causes the oil to leak, leading to an increase in engine temperature and eventually engine failure. To fix this issue, you will need to replace the head gasket, which can be done by taking out the engine block and replacing the old gasket with a new one.