Have a Car Question? Ask a Mechanic Online.
Ha, Mechanics? Wait for a few consecutive dry days and bust out the garden hose. Wet the entire car down in the driveway. You might even want to place a lovely assistant in the passenger seat to listen for water entering the cabin. Make sure you blast the windshield enough to get the AC fresh air intake. You probably have a loose drain at the bottom of the air box that is allowing water to pour straight into the passenger compartment. Do the windshield first. If you don't see any water in the car after that, blast the door next. At that point you just find the pool and start working your way up. Finding a water leak is a great way to spend a Saturday afternoon with your wife, and with any luck, she wont charge you the $80 your mechanic would charge you to do the exact same thing.