cclive

So after reading this last thread about cabin filters:

http://forums.corvetteforum.com/c6-c...ir-filter.html

where there was considerable discussion over whether this Purolator C-25623 filter does or does not have charcoal in it....I went out and looked at the one that I have. I could clearly see the black layer within the filter. When I hear hoofbeats, I think Horses, not Zebras. So when I saw this black stuff, I figured that it was charcoal. After all, what other black substance would be in a brand new cabin air filter. But with all the disagreement in that thread, I figured it would take more than simple common sense to satisfy some on the forum, so here are some pictures. First the filter and the box...to prove that this is actually the Purolator C25623:


Second is a close-up of the filter, the knife I used, and the black, granular substance that I scraped from the inside of the filter. The place it came from is clearly visible also:


Last is a pic of the black substance where I have smeared it on the paper with my finger.....finger with black on it is clearly visible...lol:



Now I realize that some will not be satisfied with this analysis because I do not have a lab report of the chemical makeup of the black sustance......I was unwilling to spend the money for a lab report...and there are no labs close by here in rural southern Utah anyway.....but for those of us who hear horses and only rarely a zebra, I think this clearly and beyond a shadow of a doubt demonstrates that the Purolator C25623 filter indeed does have charcoal in it.....and all for about $12 at Advance Auto Parts or Pep Boys. I now await the flames!

Monts

Too bad the folks a Purolator don't know about the charcoal, nor do the specs on their web site mention it. Strange. Good for you, I paid $20 for the NAPA. Did yours flex getting it in or are the sides rigid?

Thanks for the pics!

Now you aren't saying the air flow is up as well are you?

danl72

Good that you caught it.

cclive

...No, I am a believer in the "airflow is down" theory of operation...lol. If the airflow is up, then it means that the air goes through the blower before it goes through the filter. This would be like putting the engine's air filter on the exhaust manifold.
The sides of the filter are fairly rigid...it just requires that you use the sides to push the filter into place, and not push in on the center part. The filter feels much more substantial than the one that came in the car from the factory.
And to be fair to the Purolator engineers on the phone, I doubt that they would have answered that way if they had actually had this filter in their hands.

WAwatchnut

Nice investigative work. I'm convinced.

Unfortunately there isn't a single store that carries the Purolator filters nearby (25 miles). Guess I'll either have to make the trip down to the nearest Pep Boys, and spend $9 in gas getting there, or just buy one from Napa.

Jimmy 2 Times

the puraltor filters here are in blue boxes

AORoads

I haven't looked for the Vette yet, but they were out for my DD. Nice investigative sleuthing. Or, is that just dirt on your fingers.... j/k

RadarP3C

I'm not. How do we know the OP didn't "plant" the charcoal himself and then take the pics?

AORoads

Yeah, maybe it's coarse ground pepper. ...

Is he sneezing, yet?

07MontRedcp

Maybe it's a blue state thing. I'm sure that the Obama cult will require that the box be green soon enough.

cclive

I just knew I should have had an unbiased witness in the pics....perhaps a local judge or priest?????

cclive

This pepper suspicion is exactly why I smeared the "charcoal" on the paper and my finger. I tried, but was unable to get pepper to smear properly...

humvet

Brilliant

The Clevite Kid

My local Advance Auto has a big display of cabin air filters, but not the C6 part number. I went to the counter, showed them the part no., they found one in the warehouse, and I had it the next day, for the $11+ price, no shipping or service charge. And it looked just like the one in the OP's pictures - internal activated charcoal. The back of the box says "Some" applications have charcoal, but does not say which ones.

///DarkSide\\\

Must......resist.......Nooooooo......it' s.....not......true!!!!!!!!











J/k - I guess I'll be buying a Purolator

Thanks

RUBYREDVET

Don't be pulled in by his logical and well thought out post.
You can't believe anything written by a guy from Southern Utah.

cclive

Every one of my wives would argue that point with you,....well actually only the ones who can read....but thats MOST of them!

cclive

I understand your concern.....must.............buy .................most..............expen sive..........filter...........available ..............

Fun thread!

Wah

Once in a while I got access to an electron microscope. I can have an elemental analysis done on the "black stuff". I can't guarantee when though.

The Clevite Kid

Don't have to get all fancy,

just put the black granules on a piece of stainless steel, and heat from beneath with a propane torch. I'll bet they light up orange like charcoal, and then turn to carbon monoxide and carbon dioxide and disperse in the atmosphere.