How do you tell the difference between a blown head gasket and a cracked head on a 1995 Chevy Corisca?
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.
A cracked block means that the engine itself is cracked. A blown head-gasket means that the gasket between the engine and the head has blown. Either can be caused by overheating the engine. When an engine overheats the head can warp causing the head-gasket to give out. In some engines the heat cracks the block. If the block is cracked, it's over. If the head-gasket is blown you can always machine the head surface and…
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.
Have a compression test run to see if you have a problem with the head or gasket. Once you find out you do, then you must remove the heads in order to determine what the problem is. Have the heads inspected at a machine shop to determine if they are warped or cracked. Once the heads are removed the gasket must be replaced so it really makes no difference.
You have a blown head gasket or a cracked head. STOP driving this car immediately or you will do serious damage to the engine. It will need the gasket replaced and the head checked. You have a blown head gasket or a cracked head. STOP driving this car immediately or you will do serious damage to the engine. It will need the gasket replaced and the head checked.
What could it be in a 1994 subaru legacy that water blast out of the water reservior when engine revved?
In either case, the head has to be removed. Once it's off, a machine shop can "Flux" the head. IF IT'S and iron head, they put a powerful magnet on the head then spray powdered iron to see where it lines up. If the powdered iron gathers along a line, you have a cracked head and it isn't worth anything more than scrap prices.