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carguy8888
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Name : Brian Cohen
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptySat Jun 13, 2020 10:25 pm

I was driving home tonight with the sunroof open. When I accelerate I still seem to get an intermittent mildew smell with the HP AC unit off. I poured an enzyme-based cleaner down the Cowell twice and cleaned it with hot water. Is there a next step?
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LARRY70GS
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LARRY70GS

Name : Larry
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Location : Oakland Gardens, NY
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptySun Jun 14, 2020 8:13 am

Make sure your carpet isn't wet anywhere. Feel the carpet in the rear and under the seats. If the carpet is getting wet, it will stink after awhile.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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carguy8888
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Name : Brian Cohen
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptySun Jun 14, 2020 1:39 pm

Will do, the smell is not constant. I randomly get a puff that seems to be coming from the HVAC but I will check the carpet.
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Rickw
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Name : Rick
Location : Lancaster, MA
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptySun Jun 14, 2020 8:01 pm

If the Evaporator drain tube is plugged or partially clogged then you will get condensate water and/or some of the solution you poured into the intake cowling to run down the passenger side of the cabin, out of the HVAC plenum, and under the carpet.

Pull that part of the carpet back first to see if the insulation under the carpet is wet. Then you'll know.

You may still have to pull the HVAC plenum down to clear the drain or try using some low pressure air into the rubber drain tube from under the car up into the plenum to try and clear any obstructions.
It all depends what you find.
Glad to hear you have no freon leaks anymore. That's good news.
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carguy8888
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Name : Brian Cohen
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptySun Jun 14, 2020 8:40 pm

That sounds promising. Where does the drain tube come out underneath the car?
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Rickw
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptySun Jun 14, 2020 9:09 pm

carguy8888 wrote:
That sounds promising. Where does the drain tube come out underneath the car?

If I remember correctly it's somewhere under the passenger side below where the A/C plenum is in the car.

A long time ago I remember someone on here posting a pic of the rubber nipple coming down from the body.

Wish I had a pic for you, but someone else may have one. Albert's always a good source for these kinds of things or try
"Search" and see where that gets you.

It can't hurt to blow some low pressure air up the tube. Don't hit it with a lot of air pressure (No Shop Pressure)
something regulated to much lower pressure so you don't blow that nipple off the bottom of the cabin.
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carguy8888
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Name : Brian Cohen
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptySun Jun 14, 2020 9:10 pm

That's what I will have done. Thank you.
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albertj
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albertj

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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptyMon Jun 15, 2020 9:00 am

Rickw wrote:
carguy8888 wrote:
That sounds promising. Where does the drain tube come out underneath the car?

If I remember correctly it's somewhere under the passenger side below where the A/C plenum is in the car.

A long time ago I remember someone on here posting a pic of the rubber nipple coming down from the body.

Wish I had a pic for you, but someone else may have one. Albert's always a good source for these kinds of things or try
"Search" and see where that gets you.

It can't hurt to blow some low pressure air up the tube. Don't hit it with a lot of air pressure (No Shop Pressure)
something regulated to much lower pressure so you don't blow that nipple off the bottom of the cabin.

I don't have that picture.

Also, however, if the nipple is *missing* then for some reason the condensate will run into the cabin.  I have never figured out why that is.  My guess is yours is missing.  

Read this thread for explanation and pictures.

A parts counter person who knows GM cars well enough may be able to find you one of these tubes, or a substitute that will work fine; similar ones were used on a number of GM cars. I have heard that you can fit a short piece of rubber tubing in place of the spout but I have no idea whether that will really work right.

Peace out

Albertj
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LARRY70GS
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LARRY70GS

Name : Larry
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptyMon Jun 15, 2020 9:09 am


_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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albertj
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albertj

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Location : Finger Lakes of New York State
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptyMon Jun 15, 2020 4:10 pm

Oops.

The threads about this are https://rivperformance.editboard.com/t3783-where-is-the-a-c-drain-located [the problems here were dirt blocking the tube, and the wrong tube installed] and https://rivperformance.editboard.com/t12360-where-does-this-go [shows the drain port from looking-up-from-ground].  

The GM part number was 25723079.

One way to get one would be to take one off a 2005 or earlier Park Ave in a junkyard, using a razor or scraper, then gluing it onto your car's drain port using silicone or urethane.  

But first, just check if it's blocked.

Albertj


Last edited by albertj on Tue Jun 16, 2020 8:39 am; edited 1 time in total
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carguy8888
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptyMon Jun 15, 2020 7:01 pm

I will get it on a lift next week to check when I install my new rear suspension level arm. I did notice water coming out of the bottom of the car when I poured hot water down the cowl and I don't hear anything swishing when I make turns. Great advice as usual.
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albertj
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albertj

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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptyTue Jun 16, 2020 8:26 am

carguy8888 wrote:
I will get it on a lift next week to check when I install my new rear suspension level arm. I did notice water coming out of the bottom of the car when I poured hot water down the cowl and I don't hear anything swishing when I make turns. Great advice as usual.

If you open the hood and look at the firewall on the passenger side, below the A/C lines, you should find the duckbill or the hole.

As for the swishing... Had you heard swishing in turns prior?
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carguy8888
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Name : Brian Cohen
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptyTue Jun 16, 2020 10:28 pm

Never heard swishing. I don't think anything is leaking onto the carpet, I have big rubber mats unless I am smelling a random drop of something. The odor is intermittent not constant.
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albertj
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albertj

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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptyWed Jun 17, 2020 10:54 am

carguy8888 wrote:
Never heard swishing. I don't think anything is leaking onto the carpet, I have big rubber mats unless I am smelling a random drop of something. The odor is intermittent not constant.

The leak goes under the carpet onto/into the padding. You might want to check there.
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carguy8888
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Name : Brian Cohen
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PostSubject: Re: Annoyed   Annoyed - Page 2 EmptyThu Jun 18, 2020 8:43 pm

Today it smelled like old rubber. Just waiting for some time to have time to have it looked at.
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