You will not know until your remove the head. You have to remove the head in order to replace the gasket and once you have the head removed have it magna fluxed at a machine shop. That will reveal any cracks.
How do you know the gasket is not bad? f you oil is milky then there is moisture mixed with the oil. This can be a blown head gasket or a warped or cracked head.
what are you asking here? PLease be more specific ...like - how do I know if my head gasket is blown, or what do I do about a blown head gasket ......
perform a pressure test on the cylinders. if they don't hold pressure it's a blown head gasket
There are several possible indications of a blown head gasket: If the head gasket is blown between adjacent cylinders there will be poor or no compression in either cylinder. Poor compression in any cylinder can be caused by a blown head gasket. That condition can also be caused by a burned valve or piston. Coolant in the crank case can be caused by a blown head gasket. Compression in the coolant can be caused by a blown head gasket. An engine with a blown head gasket usually loses performance and runs poorly or not at all.
The only way to know for sure, is to remove the head and have it magnafluxed. If it has either of the above in the question, the head would have to be removed anyway.
my head gasket was blown and it had water in the oil which made the oil look a milky color
You will have to remove the head, inspect the gasket for breaks, check the head for flatness, and have a machine shop test the head.You will have to remove the head, inspect the gasket for breaks, check the head for flatness, and have a machine shop test the head.
ckeck the oil dipstick if the oil has a color like chocolate milk the oil has water/colant in it which means the head gasket is blown and its leakin water into the engine block
Do a compression test.
The head will need to be inspected at a machine shop. They can tell you if it is warped or cracked.
If you have a blown head gasket. you pour it in the radiator and it's suppose to fix your blown head gasket. I've never used it so i don't know if it actually works
It does not matter. If one is blown on a V6 or V8 then you need to replace them both.