A blown head gasket is one of these problems that no driver wants to encounter. It basically means you’re car is no longer drivable, and a costly repair is needed to get your beloved motor working again.
As always, the expensive part is not necessarily the part itself, it’s the fact that it’s labour intensive. It’s not usually a case of merely replacing the head gasket, and quite often mechanics need to fix the part that’s caused the gasket to blow. This means more labour time and that’s before anything has been replaced.
A decent gasket is also pretty pricey and that obviously only adds to the expensive costs, and many old vehicles have been scrapped because of this issue, mainly because the price to repair the car is more than the car is worth itself.