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Old 11-21-2011, 04:53 PM   #1
93SC2'in
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Default adding a filter to the hvac

i live in a really dusty agricultural area and i get sick of all the nasty smells and dust just coming right in even with the recirc on in my 95 sl2.. the main question i have is where could i get an exploded view of the hvac system for a 95-99?

And is it even possible without getting really inventive and making my own ducts/compartment?

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Old 11-21-2011, 05:18 PM   #2
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Default Re: adding a filter to the hvac

I would doubt it would help noticeably with smells, as the car isn't exactly sealed up tight. Might help a bit with dust, but it might also just clog up quickly & cut down on system function.

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Old 11-21-2011, 05:25 PM   #3
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Default Re: adding a filter to the hvac

the smells are not such a big deal as is the dust, but yeah i am concerned about that as well as the increased air resistance just from a clean filter making for weak output as well. But i know that 2000+ cars do have them did saturns ever come equipped with cabin filters?.. i may still poke around at the idea as i am stuck with this car for the foreseeable future and stuck in this dust bowl for now as well =/

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Old 11-21-2011, 05:26 PM   #4
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Default Re: adding a filter to the hvac

Only real HVAC opening is under the hood. Passenger side, normally has a couple foam gasket's sandwiching a piece of wire mesh and is glued to the car.

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Old 11-21-2011, 07:16 PM   #5
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Default Re: adding a filter to the hvac

The HVAC module was not designed with envelope packaging for a filter nor was the blower motor spec'd out for the pressure drop across a filter.

Wear a surgical mask when driving, it's cheaper and more effective.

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Old 11-21-2011, 08:03 PM   #6
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Default Re: adding a filter to the hvac

Quote:
Originally Posted by SC2BuzzBomb View Post
The HVAC module was not designed with envelope packaging for a filter nor was the blower motor spec'd out for the pressure drop across a filter.

Wear a surgical mask when driving, it's cheaper and more effective.
well i'm not gonna drive around with a surgical mask on, and wiring in a moar powerful blower motor is not an issue..

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Old 11-22-2011, 12:46 PM   #7
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Default Re: adding a filter to the hvac

Quote:
Originally Posted by 93SC2'in View Post
But i know that 2000+ cars do have them did saturns ever come equipped with cabin filters?
The S-Series never did. I'm not sure which other Saturns (if any) ever did, but making their filters work wouldn't be any easier than any other car's filter or components.

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Old 11-22-2011, 01:02 PM   #8
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Default Re: adding a filter to the hvac

Tape a dryer sheet or some other similar filter material over the vent opening under the right side corner of the hood. It will catch most of the dust and help with smell somewhat. It can be changed regularly enough to keep airflow at a decent level. You could cut up a furnace filter, use one of the better ones that cost about 5 to 10 dollars each.
It won't help with dust that migrates in by way of door seals or open windows though. If you keep the fan switch in the second position and the windows closed, you should create enough positive interior pressure to combat the migration.
If you are really good at kludging, you could enlarge the vent hole and use more filter area.

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Old 11-22-2011, 02:21 PM   #9
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Default Re: adding a filter to the hvac

i will try that and see what happens, i also am gonna remove the upper dash and see what i can get onto the inlet for the resirc maybe i can sandwich it between them. i've been looking at oval shaped vacuum filters and i may be onto something..

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Old 11-30-2011, 05:14 PM   #10
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Default Re: adding a filter to the hvac

Wouldn't be when you drive near Harris Ranch's feed lot by any chance? The smell along I-5 there is enough to make you to swear off beef forever.

My beemer has a cabin air filter. It does help with dust but does absolutely nothing for smells of course (the molecules are too small).

Check out the hardware stores for lawnmower air filters. You might be able to find one that would fit over or entirely replace the screen at the top of the cowl under the hood, as referred to earlier. It would be of the same form as the regular engine air filter on these cars, just smaller. It shouldn't restrict too much as long as it was changed regularly.

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Old 12-05-2011, 09:04 PM   #11
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Default Re: adding a filter to the hvac

Would a picture of the top half of the HVAC help?
http://i995.photobucket.com/albums/a...EvapDebris.jpg

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Old 12-05-2011, 09:22 PM   #12
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Default Re: adding a filter to the hvac

Quote:
Originally Posted by bumpdraft View Post
Would a picture of the top half of the HVAC help?
http://i995.photobucket.com/albums/a...EvapDebris.jpg
A Delphi Harrison HVAC module. Looks like the EVAP core was "Floodcoated" in Lockport, NY. I recall those modules being assembled and tested in Tuscaloosa, Alabama.

Putting that thing back together will certainly lead to some interesting whistles and other sounds.

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