Leaks my car leaks antifreeze in the exust

If the vehicle has been overheated, most likely the engine head is either cracked between the valve openings or the head is warped, causing the coolant to leak through the head gasket seal. Though often tried, it is very unlikely that just replacing the head gasket will fix your problem. The only way to tell is to pull the head of the engine and check the head and top of the engine bloc with a precision straight edge. If the head shows a gap more than 2 or 3 thousand of an inch you will need to get the head straighten or will need to purchase a new or remanufactured head. Planing the head alone while repairing the head gasket sealing surface, will still leave the camshaft out of alignment causing it to bind resulting in excessive wear in a very short period of time. If the head and block are both good and flat, have the head vacuum checked for cracks. If it is drawing in coolant and the head and block surfaces look ok, most likely the head is cracked and will require replacement. If everything checks out ok, buy a new gasket set, put it back together, remembering to replace and oil the head bolt when torquing, and keep your fingers crossed. Remember to properly time the engine and hand crank over before trying to start. If severly out of time, you will trash the engine when trying to restart.

The only thing that causes this is a blown head gasket or a cracked block, the head gasket is the most common problem, the block being cracked rare/