6637 air filter
Elder User
Joined: Mar 2004
Posts: 580
Likes: 0
From: Chippewa Falls, WI
Probably going to order the 6637 kit when I get my next paycheck. When I bought the truck I put in a K&N in the stock airbox not knowing any better. Always ran them in my other vehicles without a problem. But after hanging around here for a while I decided to pull it out and put the paper WIX one back in. Now I want something better flowing and safe for the engine and this seems the best and by very far the cheapest solution. For what they get for the above mentioned cold air kits and such they are crazy and when you do have to replace their filters they rake you over the coals again.
I was curious what filter Clay shipped with the kits and I am glad to hear they are Baldwin. I was wondering why the filter from Napa costs almost as much as the whole kit does from Clay and his replacement filters are only 29$. now it makes sense.
I was curious what filter Clay shipped with the kits and I am glad to hear they are Baldwin. I was wondering why the filter from Napa costs almost as much as the whole kit does from Clay and his replacement filters are only 29$. now it makes sense.
Thread Starter
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Elder User
Joined: Mar 2012
Posts: 534
Likes: 0
From: Quaker Hill
Paul, while I was at NAPA trying to find my CCV parts, I decided to try and price my own 6637 filter together for my other truck. When the guy told me it was $50 for just the filter, I decided I'd rather call Clay again!
Elder User
Joined: Mar 2004
Posts: 580
Likes: 0
From: Chippewa Falls, WI
I went ahead and ordered the yellow-tape box last night. Figure I can test its performance the week after next on my camping trip. Might as well cash in on the 14hr days I have been pulling at work.
Super Moderator
Joined: Dec 2011
Posts: 13,354
Likes: 6,144
Whoa... did you feel that wind?
That was a blast from the '13 past.
Welcome back @Lex2002 !
The only way to tell if an air filter needs to be changed is with an air restriction gauge.
It isn't possible to tell visually, especially with a depth loading filter media, where fine dust can embed itself into the filter fabric not visible to the naked, or even the aided eye, clogging up pores to the point of restriction.
There is just no way to tell by your photos, or holding the filter physically in hand, whether or not it needs to be changed. The best way to tell is with an air restriction gauge, when operating under full load.
That was a blast from the '13 past.
Welcome back @Lex2002 !
The only way to tell if an air filter needs to be changed is with an air restriction gauge.
It isn't possible to tell visually, especially with a depth loading filter media, where fine dust can embed itself into the filter fabric not visible to the naked, or even the aided eye, clogging up pores to the point of restriction.
There is just no way to tell by your photos, or holding the filter physically in hand, whether or not it needs to be changed. The best way to tell is with an air restriction gauge, when operating under full load.
Fleet Mechanic
Joined: Apr 2019
Posts: 1,737
Likes: 661
From: South AR
Whoa... did you feel that wind?
That was a blast from the '13 past.
Welcome back @Lex2002 !
The only way to tell if an air filter needs to be changed is with an air restriction gauge.
It isn't possible to tell visually, especially with a depth loading filter media, where fine dust can embed itself into the filter fabric not visible to the naked, or even the aided eye, clogging up pores to the point of restriction.
There is just no way to tell by your photos, or holding the filter physically in hand, whether or not it needs to be changed. The best way to tell is with an air restriction gauge, when operating under full load.
That was a blast from the '13 past.
Welcome back @Lex2002 !
The only way to tell if an air filter needs to be changed is with an air restriction gauge.
It isn't possible to tell visually, especially with a depth loading filter media, where fine dust can embed itself into the filter fabric not visible to the naked, or even the aided eye, clogging up pores to the point of restriction.
There is just no way to tell by your photos, or holding the filter physically in hand, whether or not it needs to be changed. The best way to tell is with an air restriction gauge, when operating under full load.
Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
I do agree that a restriction gauge is the way to really know when it's time to change, I always change mine judging by looks, and if I can't remember the last time it was changed. I would rather change it too often rather than not enough. BTW, has anyone run theirs so long that the bottom of the filter wore a spot in the filter where it rubs? I have.
i ain't rite
Joined: Mar 2005
Posts: 65,609
Likes: 5,630
From: Marlboro Mental Hospital.
my 6637 filters in the 02 and 88 are 13 years old and still clean. but i change the filter cover every 6 months.
i have 3 covers. put a clean one on the truck, and wash the one i took off. once dry, it gets put on the 88 and that one gets washed and hung up for the next swap 6 months later.
i have 3 covers. put a clean one on the truck, and wash the one i took off. once dry, it gets put on the 88 and that one gets washed and hung up for the next swap 6 months later.
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Cargo Master
Joined: Aug 2011
Posts: 2,319
Likes: 89
Whoa... did you feel that wind?
That was a blast from the '13 past.
Welcome back @Lex2002 !
The only way to tell if an air filter needs to be changed is with an air restriction gauge.
It isn't possible to tell visually, especially with a depth loading filter media, where fine dust can embed itself into the filter fabric not visible to the naked, or even the aided eye, clogging up pores to the point of restriction.
There is just no way to tell by your photos, or holding the filter physically in hand, whether or not it needs to be changed. The best way to tell is with an air restriction gauge, when operating under full load.
That was a blast from the '13 past.
Welcome back @Lex2002 !
The only way to tell if an air filter needs to be changed is with an air restriction gauge.
It isn't possible to tell visually, especially with a depth loading filter media, where fine dust can embed itself into the filter fabric not visible to the naked, or even the aided eye, clogging up pores to the point of restriction.
There is just no way to tell by your photos, or holding the filter physically in hand, whether or not it needs to be changed. The best way to tell is with an air restriction gauge, when operating under full load.
....i haven't gone anywhere.. I've been here in the 4th dimension.
Cargo Master
Joined: Mar 2019
Posts: 2,907
Likes: 788
From: Kinnula,Finland
Cheaping out in air filter is the stupidest thing I can tell.
Atleast talking about paper material filters,they will detoriate during time,so them need to be changed regularly,regardless being dirty or not.
Ugh,i have spoken.(can i say that these days?)
Atleast talking about paper material filters,they will detoriate during time,so them need to be changed regularly,regardless being dirty or not.
Ugh,i have spoken.(can i say that these days?)
Cargo Master
Joined: Aug 2011
Posts: 2,319
Likes: 89
Guzzle has a write up on the 6637 air filter air restrictor retrofit however I cannot fit it at the end of the 6637... It barely fits with my setup.
Welcome to guzzle's 6637 Filter Restriction Sensor Web Page
Welcome to guzzle's 6637 Filter Restriction Sensor Web Page
Cargo Master
Joined: Aug 2011
Posts: 2,319
Likes: 89
6637 is a good economical alternative but man I'm sick of the noise. Id rather go to something enclosed...
Please send money...
Hotshot
Joined: Dec 2012
Posts: 11,278
Likes: 1,658
From: Las Cruces New Mexico
A new air filter will "glow bright" inside a bad filter will look dark where you can't see sunlight go thru it simple.