Re: leaking water from front passenger side, under...
It is either condensation water from the A/C unit that should go out a drain tube to the outside (only if A/C or Defrost is on) or a leaky heater core. If it is a heater core you can usually smell a coolant smell and the water will be warm and your windows will fog up inside. Heater core is more common. Joe ASE Master Tech
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The water gushing in on passenger side, is probably antifreeze, check that the heater core isn't leaking. If it is gushing try and capture some of this water and and see if it is antifreeze or just water. If antifreeze then it's the heatercore if water the. It's from the a/c
Your AC drain is clogged. If you look near the floor under the dash on the passenger side you will find a small rubber hose that goes thru the floor board. Take the hose off and clean it out. You will find that it is clogged with dirt. Once it is cleaned out hook it back up under the dash. You will notice that if the car is running with the AC on, you will be able to see water dripping on the passenger side under the car that will mean you cleaned the hose out and it is working.
To be honest, most mechanics hate replacing heater cores because of their location. They are usually on the firewall on the inside of the car underneath the glove box under the dashboard and behind a plastic black cover. If you look under the hood at the firewall on the passenger side, you should see on inlet hose and one outlet hose which should be replaced along with the heater core. They must be removed first before you can remove the heater core. Basically you have to lay on your back on the passenger side Front) floorboard, remove the necessary panels to get to the cover, remove the heater core and install the new one first, then intall the new hoses, reinstall the cover and any panels you removed. Lastly, be sure to bleed and top off the coolant while you run the heater, then check for leaks
If leaking coolant under dash on passenger side floor broad it's your heater core. Call's for 2.8 labor flat time to remove heater core, in some case's you'll have to recover, evacuate and recharge your A/C system to remove your heater core.Sit under dash on passenger side.
The heater core would be the only cause of the souce of water drippng when you add to the cooling system. Check your heater core to heater hose connections first. Do the simple stuff before embarking on a "fantastic voyage". You may just have a slightly cracked hose as well.