Water leaking into passenger compartment from under the dash

Well Terry...that is hard to say with the limited information provided
so I'll give you some areas to look at...listed in order of most likely area of concern.


1/
If your vehicle has a sunroof...it's drains could be plugged which may allow water to drain into the passenger compartment. To check this open the sunroof and introduce a slow stream of water to make sure the roof drains are clear and running freely.

2/
If your vehicle has a plugged front drain pan for the windshield, that may overflow into the passenger compartment. To check this area the wipers and plastic trim parts have to be removed. The fast way is to have a helper spray the windshield with a garden hose while you monitor under the dash for leaks.

3/
If the wet area is on the same side as the vehicles heater core
then the core may be leaking. You will smell the coolant and your windshield may fog up. Check by observing the core enclosure, while the engine is running and also check the radiator fluid level (while the engine is cold) as it will drop if the core is leaking. If the A/C drain pan is plugged (and if it is located in the passenger compartment) the collected condensation may overflow into the passenger compartment..

Good Luck, let us now if you are successful.

Usually the only thing inside the passenger compartment that involves coolant is the heater core.

your heater core is bad they leak when they go bad youll have to replace its under/behind the dash

Yes. It could cause the water to seep into the passenger compartment thru seams in the sheetmetal or the heater box instead of draining onto the ground.

Bulletin No.: 03-01-39-011B
Date: November 22, 2005
TECHNICAL
Subject:
Water Leaks Into Passenger Compartment Through HVAC Module Condensate Drain Tube When Parked on Incline/Uphill Position (Install Auxiliary Drain Tube Extension)
Models:
2003-2006 Saturn ION Sedans and Coupes
Supercede:
This bulletin is being revised to include the 2005 and 2006 model years. Please discard Corporate Bulletin Number 03-01-39-011A (Section 01 - HVAC).
Condition
When vehicle is parked on an incline with the front end up during a rainstorm or when driving uphill during a rainstorm, water may leak into the passenger compartment through the condensate drain tube opening of the HVAC module.
Cause
Water may drain out of the cowl drain, then drain down the front of the dash panel in the engine compartment and seep into the HVAC module condensate drain tube opening. The water then collects in the heater core cover and upon acceleration may leak into the passenger compartment through the heater core cover seams.
Correction 1. Open the hood and locate the HVAC module condensate drain tube in the engine compartment on the right side of the dash panel.
Important: During installation of the auxiliary drain tube, do not make contact with the HVAC module foam gasket located at the base of the HVAC module condensate drain tube. If the auxiliary drain tube is pushed on too far and makes contact with the foam gasket, water may leak into the passenger compartment.
2. Slide the auxiliary drain tube onto the HVAC module condensate drain tube and make sure that the auxiliary drain tube is angled downwards after installation.

it is where a hose comes throguh the firewall, There is a TSB on this.

Printable View (70 KB) TSB
06-2-6

• WATER LEAK IN RIGHT FRONT OF PASSENGER COMPARTMENT

Publication Date: January 17, 2006
FORD: 2005/06 Freestyle
ISSUE: Some 2005 Freestyle vehicles may exhibit a water leak at the right front passenger compartment. This may be due to grommet for rear washer fluid line at dash not being fully seated.
ACTION: Inspect windshield washer grommet from inside vehicle under dash and properly seat if out of position. Pull carpet back and reach under bulkhead pad to install. Removal of instrument panel is not required. (Figure 1)

Open up the sunroof and try to unclog the drainage. You will see this from the inside of the ML by opening the whole sunroof and stickin your hear thru. On the drivers side you will see a drainage whole similar to the passenger side. Mine did the same thing and unclogged it with a straw. [email protected]

Get your Heater Core Checked...that is a sure indication.

Sounds like one of two things are happening. Either the hose going to the heater core (on the engine side of the dash) is leaking causing coolant to spray into the passenger compartment or your heater core is leaking which is causing the dripping from the passenger side of the dash. This would also cause a loss of coolant in the engine which would cause the engine to overheat and not enough coolant to get to the heater core to supply heat to the passenger compartment. Check your coolant level (while engine is cold) and refill it with a 50/50 mix of coolant and water after you tighten the leaking hose or replace the heater core.Then start the engine and let it warm up to operating temperature. Again let it cool down and then top off the radiator with the 50/50 mix of coolant. Do not under any circumstances open the radiator cap while the engine is hot.

look the lines under dash need to remove glove compartment must be a hose from small radietor