Water may leak through a fan box on a Chevy Corsica if the water pump has broken. Another cause may be that debris clogged one of the drain holes.
Leak in heater core
In the filler neck- follow instructions carefully
Very helpful!
possibly a vacuum leak
yes becaus the wind from driving will push water through or you will have an air leak
Maybe the door protector is torn and water leaks through there. if that's not the case then is could be your door has an un even opening. and that is where the water goes through
Most likely you have a vacume leak under the dash.Check for lines off or broken.They will harden and crack with excessive heat,such as in the engine compartment.
when i turn my truck off water leaks from the bottom all the time
listen for a sucking sound where ever it sound loudest check for a pulled out hose or broken hose ,there may be some located under the top plate in the engine.
maybe the heater core.
My 96 corsica does the same thing, so maybe this will help: I have a small coolant leak, and I have to put more antifreeze in quite regularly. when my coolant level is too low, my heat stops working. try checking your coolant levels, remember to use universal or dexcool.
If tank has rusted through, tank will leak. If bladder goes bad, tank should not leak.