First, I'm now the proud owner of a 99 Intrigue-My Dad bought my Mom a new set of wheels, and I inherited the beast with only 47K on it. Anyway, here's the problem: I've been noticing that when I drive with the AC on, water tends to accumulate on the front passenger side floor. I'm assuming that since there hasn't been any rain (I got the car just AFTER the big rain here last month!) this means that the AC evaporator drain's clogged. Could someone point out where the drain is and the best way to clear it out?

Thanks for your help,

Deja vu!
I'm trying to find info on my 99 Olds Intrigue, and I keep seeing the same problem posted! I had the same problem and so have others.
Took me two trips back to the dealer before they realized they needed to seal a ?cowl vent? Not exactly sure what it was they sealed, but it is discussed on the Edmunds site.
Hope the problem is fixed bythis time though!

Damn...how did I miss this....sorry about that....

Yes, do you know where the cabin air filter is located? well, whether or not you have a filter there or not (my 99 gls has one, while my mom's 98 base model didn't...but it still had the spot for it, just no filter) on the passenger side there is a plastic piece that comes off in the cowl area...or windshield wiper area. There's a rubber piece of trim (weatherstripping) in there, much like you'd find in the trunk area or doors....etc.

Anyways, that piece of rubber had dried out in my car, and had fallen off and didn't want to stay on the cowl lip anymore, thus allowing rain water to drain into the cabin air filter, directly below that...the blower and the the passenger side floor.

I ended up replacing the piece with new weatherstripping.

TOC Admin
Brando

Wow....seems that wasn't my only problem. I'm still getting water on the passenger side. First off, the trunk weatherstripping I used didn't work very well, so I ordered the correct part from the dealer while I was in the Upper Penninsula. Well, that stopped the rain from coming in, but anytime that I moved the car.....with the A/C on, water would drip in the passenger side, so I know for sure that my Evaporator Case drain is plugged (it happens to be a TSB).

I'm going to take care of it tomorrow, I'll try and snap some pics of location. It should have a rubber elbow coming from the actual drain hole. If it's missing, it's best to get a new one from the dealer, as the TSB says wind/road noise can occur if it's missing.

In order to clean it, you need to remove the rubber elbow, and use a 9mm (11/32) drill bit or similar tool to clean out the material blocking the drain. Distance to other side of the evaporator case is 5 inches. You want to make sure that the rubber elbow isn't clogged too. Reinstall rubber elbow after you're done cleaning, use a little silicone spray to slip it back in easier.

TOC Admin
Brando

Well, I got it done....wasn't the easiest thing to do.

ALLDATA said to raise the vehicle and remove the elbow....I saw no way of reaching it from underneath....I couldn't even see it. So no pictures.

It's right behind the engine in the middle of the firewall, right next to the power steering hoses. I had to remove the coolant resevoir to gain access, it probably would have helped to move the engine forward... But I got it off and back on, the elbow was clogged with dirt. I'm not sure how I got it off and back on, it was a pretty tight squeeze...again, I'd recommend moving the engine forward to do this...for the 3.5 anyways...might be easier on the 3800.

I also oiled my blower motor up (there's a hole on the bottom, removed it and dropped some 3in1 in there), since the water didn't help lubricate it much...

TOC Admin
Brando