Question about 1991 Buick Century

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Water on floor board on passenger side of 1991 Buick Century

I noticed about one inch of water on floor board on passenger side after a very heavy rain. I checked and there was no way water could have gotten in. Could it be heater core? And if it is heater core would it hurt to drive it before replacing heater core?

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Engine coolant will feel oily and the windshield will fog up and the car will stink. If it is just water it could be coming from the passenger door weatherstrip at top. The ac drain tube , if stopped up will also leak water in the floorboard.

Posted on Jun 17, 2009

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Have a 94 Buick century. Replaced thermostate. Running hot. Looks as tho is leaking underneath front near pump. And also in passenger floor board can't see the leak from inside. It's just alwa


Whenever I see a system which is leaking from more than one or two places, I do a head gasket check because that tells me that the system is experiencing above normal pressures. the wet floor is a heater core. whether it's a water pump or some other thing near it only you can tell. Actually it rarely happens, but the wet floor could be the hose where it meets the heater core at the firewall; again, only you will be able to tell the difference. if the hose connection looks dry, assume that it is the core itself.

Mar 03, 2013 | 1994 Buick Century

1 Answer

WATER IS LEAKING INTO RIGHT FRONT FLOOR


I had the same problem on my 98 Century. Turned out when I had my oil changed, they dislodged a rubber "gasket" ( a foot long piece of rubber ) mounted on the firewall seam right in front of the passenger compartment air filter box under the passenger side windsheld wiper. It diverts water from the windshield so it doesn't flow into the fan blower box and onto the floor. It's a crappy design. If it's not in place all the water runs into the car. I had two inches of water on the floor, had to pull up and wring out the soundproofing, hit it with a hair dryer ( took two days to dry ), same for the rug. Put some silicone in the slot on the bottom of the rubber piece and set it on the firewall seam. You should see where it was originally. Good luck.

Nov 04, 2011 | 1997 Buick Century

1 Answer

When driving my 1999 Buick Lesabre in rain water will appear in the floor well on passenger side in the back. The water comes from under the carpet as much as an inch. The 4 surrounding sides of the floor...


Hey Gary!

I have noticed this condition in a few cars and have found the solution to be one of the following in each incidence ;
Cause :The drain plug in the floor board was dislodged / missing.
(assume that someone had spilled or inundated the rear compartment floor pan at one point and dislodged the plugs to relieve the excess?).
Correction : reseal the plug holes (bung holes).
Inspection proposal ;
Lay on the ground and inspect the underside of the suspect area of the vehicle. Note the 2.5 inch diameter simetrical holes with black rubber plugs protruding them.
Note condition and presence of plugs.

The front right inner fender (plastic liner that isolates the splash from tread water exhaust) is compromised , allowing the water to flow from the tire to the interior rear floor pan via the hollow thresh hold under the doors (assuming they have not rotteed out yet) to the point in the upper structural pillar between the front and rear compartments.

Solution ; GREATSTUFF the area and paint with a matching paint color.

Sep 29, 2011 | 1999 Buick LeSabre

1 Answer

Water on passenger side floor when a/c is turned on and defrost


Sounds like the condensate drain is clogged. for this you need to jack up the car and support it with 2 means. from the bottom look up just inside of the passenger side frame rail on the firewall is a rubber hose sticking out about 1 1/2 inches stick a wire in there and clean it out. You will get water coming out when your done.

Jun 07, 2011 | 2001 Buick Century

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Blower motor fan works on high setting only. I think resistor is bad but i can not locate where resistor goes. blower motor under passenger side glove box,cant seem to locate resistor. Also seen water on...


The resistors are located in the firewall just above the blower motor. they have a heavier gadge wire going to it. As for the water if it is not antifreeze then you have a leak in your cowl area by the lower windshield. I ran in to this problem on several gm cars such as yours it can be deficult to find good luck

Oct 20, 2009 | 1999 Buick Century

1 Answer

Floor board water on passenger side


Your heater core is bad. I would recommend a shop if you are a novice.

Oct 14, 2009 | 1999 Buick Century

2 Answers

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U need to clear the AC condensation drain, crawl under the car on the passenger side and near the base of the engine firewall u will find a drain pipe, (about 3/4") clear t and the water will stop going on the passenger floor.

Aug 30, 2009 | 1999 Buick Regal

1 Answer

2002 Buck Century Custom: HVAC/Def blower (interior) made intermittent squealing sounds after we saw some water on front passenger-side floor following a drive-through carwash. Now it has quit. A/C...


Noise from the blower says that armature bearings were going bad. Water on floor is a separate issue, likely the drain on the firewall is plugged. I believe your blower motor can be removed from the engine side of the firewall...it's on the passenger side.

Jun 14, 2009 | 2002 Buick Century

2 Answers

Tempature sensor location 1991 Buick century 33


If you have the 4 cyl, look in upper engine area, end of valve cover, mounted in front side of water outlet.
If it's the 6 cyl, Passenger side upper engine area, below alternator, mounted in intake manifold.

Feb 07, 2009 | 1991 Buick Century

1 Answer

Everytime it rains really hard rain gets in the car. There is a 2 or 3 inches in the passenger side floor board.


I have the same problem with my 91' 318. Water is coming in from the outside air intake at the base of the front windshield, under the black vent covers. If the basin fills up, water enters the vent system throught the outside air intake. Solution: there is a drain line at the fire wall, easily accessible between the firewall and engine block. It drains water from the basin. It becomes clogged with dirt, and prevents water from draining. However, after further inspection of mine I noticed that during periods of HEAVY rain, even a clean drain line is inadequate to drain that volume of water and the same happens. See attached link. Good Luck

http://e30.bmwdiy.info/passenger-water-leak/index.html

Jul 31, 2008 | 1993 BMW 3 Series

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