Chevy that throws water

Hello,
I have a problem, my chevy throws water through the pulmon and has the compression badly changed water pump the case is that the fan turns on and turns off the temperature rises and lowers but the time comes when the water throws me through the lung.
I don't know if that disappears to the bad compression or it can only be that it does not work something else
they changed the tree of Valancines and Busos cams were checked 3 times and this is fine, it does not have thermostat
please if they could help me, I would appreciate them a lot

Did they check the cylinder head?

Yes and is right marks the compression badly but time is okay,
it is possible that due to bad comprehensive or by bad valve cellado?

Not if the water is heated and thrown out is a croade packing or crooked or tristed butt, or problems in the block, the only shape that throws the water because of the compression is that it gets into the water system, if I understood well what you said, if I misunderstood then the problem could be in a covered radiator or by some covered duct, but I do not know that it is good that it is good.

The pulmon is the tambito that cars have with blunt radiators
my question is whether the car can be heated by bad compression taking into account that the head packaging is new, the oil and water pump too and that it is not consumed, the head is not chopped or much crooked and the fan turns to the middle of the scoreboard and turns off to a room