Oldsmobile/Buick Repair: blown head gasket, blown head gasket, intake manifold gasket

Question
I have a 85 olds w/a 307 the garage says it has a blown headgasket I pour water in it it pours out, from the back of the engine. a mechanic told me to put 2 can of block seal this should take care of it. what do you think?  

Answer
Hi Mark,
Not a chance in my opinion.
You need to find exactly where it is leaking out from, and repair it.
It could be an intake manifold gasket, head gasket, freeze plug, heater hose, or something else, but I don't think any sealer will fix it if it pours out any more than a tiny seep.

Van