Re: water leaking inside on floor mat 98 pontiac...
The only time I've ever had water inside on my floor was because my heater core crapped out. Check to see if the leak is coming from your heater box under the dash, if it is it's the heater core most likely.
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Could be the drain tube is partially clogged. It is usually located on the fire-wall or down towards the floor pan under the car. It is usually close to where the A/C lines go thru the fire-wall. About 1/2 inch diameter sticking straight out but may have a 90 degree elbow pointing down. Also, its been extra hot and humid all over and moisture could be freezing inside the unit when on MAX A/C, then suddenly melting when switched to normal. This opens the outside air door and allows warm/hot air into the unit instead of recirculating the cold air inside the car. The drain may not be able to handle a large, sudden quantity of water. Perform a "driveway" test. Open the hood, start engine and run the A/C on normal with the windows or doors open. Locate the drain tube by looking for water dripping. Once located twist 2 or 3 pipe cleaners together and verify the tube is clean. Then close the doors/windows and switch to MAX A/C. Check for water dripping. If it stops dripping, water is freezing inside and now you know why!
ok you got some possibles.1 check cabin filter if signs of water than drain plug on fire wall cloged.causing water to enter by over filling and no were to go.but thru the filter.easy fix.also if you losing anti-freeze than that will point at your heater core leaking from line or core itself.need to test it,turn on heater and check floor with a towel. lay it on floor going up to firewall inside truck.go for a good drive so pressure can build and heater on.while engine hot look at floor towel top part by firewall wet prob heatercore.also check if door is wet to eliminate possbility of door seal leaking.let me know.
Here' s trick to find water leaks into cabin area,.
Mix a quart of water with a tablespoon of Murphy's Oil Soap (won't harm finish on car) liquid, mixing gently just to mix but not foam.
Start car, and place blower fan on full setting. Close all windows and other openings to try to help increase positive air pressure inside cabin compartment
Get out of car with fan blowing (engine can be running but make sure you don't lock yourself out of car) and gently pour solution on suspected areas. If there's a leak opening, the air from cabin will cause bubbles indicated leak point.
Also raise hood and use solution on fire wall where there are seams and sealant applied. I've seen these be leaks soaking the driver's side floor mats.
If you find a leak, seal it with the best clear silicone caulk, generally about $7 a tube. Clean all areas to be sealed thoroughly of any dirt, oil, grease, or loose rusted metal.