i change the waterpump and thermostat and seen antifreeze leakin in the back nea the thermostat

 

did u put a gasket for the thermostat housing if not do so and put some RTV sealant on the one side only and that side would be the side opposite the thermostat. i had the same problem til i put a gasket on the housing. good luck

 

Yep make sure the t-stat gasket is in place correctly, and you may need to use some RTV

 

i did that and still leaking some where under the housing, what could it be

 

Under the housing is the manifold. Maybe an intake gasket leak.