The ONLY head gasket coolant additive (fix) I can most positively recomend is "blue devil" about a dozen fixed vehicles I've done. Different cases too, some wich let exhaust gases in the coolant system causing accelerated overheating as acceleration increases, and other cases where coolant gets through into combustion, causing loss of coolant and white exhaust smoke. Just make sure you follow the directions exactly as on website. I've put thousands of hard miles on head gaskets fixed with this stuff you will be surprised. I was
No.
No, that is, at best, a temporary fix. The only permanent repair is to replace the gasket.
As an emergency repair yes. The only permanent repair is to replace the gasket.
You do not repair a head gasket you replace it with a new gasket which requires removing the head.
The only repair for a blown head gasket is to replace the gasket.
You cannot repair a blown head gasket, you must remove the heads and replace the gasket.
It is not possible to repair the actual head gasket. Repair of a blown head gasket is to replace the gasket.
No, the only permanent repair for a blown head gasket is to replace the gasket. Anything else is just an emergency repair.
You cannot repair a blown head gasket, you must remove the heads and replace the gasket.
As an emergency repair yes. The only permanent repair is to replace the gasket.
You do not repair a head gasket you just replace it. Major repair involving removing the intake & exhaust manifold, and the heads.
You need to remove the head cylinder and replace the gasket. You will need at least to get a good manual if you want to do it on your own.