Some may be able to be welded but most are unrepairable and need to be replaced.
No compression could mean a blown head gasket, cracked head or cylinder.
A blown gasket can be repaired by replacing the gasket...if you are talking about the head gasket, then you have to remove the cylinder head from the engine block and replace the gasket that is inbetween them. Cracked heads generally have to be replaced because they are made of aluminum which cannot be repaired permanently once it is cracked.
A machine shop may be able to repair the head but my advice is to replace a cracked head.
No - this must be benched and rebuilt. We're not talking about a little leak that can be repaired with duct tape.
No
it all depends on type, age, the amount of damage, and what kind of damage to the engine. just find a specialist and they can help you out.
Unfortunately, if the head is cracked, not only can't you repair it in place, you'll probably need to replace the head. Typically, you can't determine if the head is cracked or if the head gasket is damaged until the head is removed. Anyone who is telling you otherwise is probably just trying to sell you the latest in a long line of "wonder products" that claim to do the impossible.
A cracked/warped head, Blown head gasket, cracked cylinder wall, or cracked/warped intake manifold.
get the cylinder bored or sleved
If it is cracked, don't repair it, replace it.
yes it does, ALOT !!!!!!!!!!
$30 if you do it yourself