-i live in a very tropical country, vehicles here doesn't come with heater. i own a 88 A/T van and the hoses that goes to the heater cores are starting to leak. is it safe to just remove all of the heater hose lines?... bypass them?... and just plug the the metal tube beside the block, at the front and the small tube behind the cylinder head?... what could be the effect of what i'm thinking to the engine's cooling system?