"Warning" against 6637
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
You could always show that guy the pictures in this thread. It's the latest turbo damaged from using a K&N filter: Installed my DIY intake and I have nicks on my turbo! - The Diesel Garage Forums
Oh, and as for getting the 6637 wet. Short of opening the hood and dumping a bucket of water on it, you won't get it wet. I ran it for several years in my truck, and driving through snow/mud/rivers/etc not once did it get hit with anything. Stayed dry as a bone. Humidity doesn't affect it either. I've driven down to the darkest swamps in Louisiana.
Oh, and as for getting the 6637 wet. Short of opening the hood and dumping a bucket of water on it, you won't get it wet. I ran it for several years in my truck, and driving through snow/mud/rivers/etc not once did it get hit with anything. Stayed dry as a bone. Humidity doesn't affect it either. I've driven down to the darkest swamps in Louisiana.
I live 12 miles from the Gulf, in the middle of marshes. Don't have swamps in south west La. I am suronded by marsh, and never had a problem with the 6637. Dry as a bone.
Postmaster
Joined: May 2008
Posts: 3,099
Likes: 0
From: horicon Wi
i thought the same thing maybe travis is the non quitting brother
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
If a 6637 were to get water on it I could certainly see it peeling apart from the inside. This is the reason some suggest using the 46637(???) that was designed for the marine applications. It has some sort of waterproofing. I here the reason most don't use this is bc of the price (about twice as much) and not everybody has heard about it. If anyone knows more than this or can correct me please do. This is all hearsay info with no data to back it up.
Cargo Master
Joined: Jan 2001
Posts: 2,726
Likes: 5
From: Slatington, PA
I'm guessing you mean normal air pressure at sea level. In fact, when the trucks running, its seeing a vacuum.
Cargo Master
Joined: Apr 2004
Posts: 3,162
Likes: 1
From: Vilonia Arkansas
I have to disagree with your big rig comment. The OTR trucks run this type of filter in its designed format. We are taking a element that was designed to be ran in an "air box" setup and running it as an open element. This air box design will almost certainly keep the filter dry. The only time I see a wet filter is if the canister started rotting away.
If a 6637 were to get water on it I could certainly see it peeling apart from the inside. This is the reason some suggest using the 46637(???) that was designed for the marine applications. It has some sort of waterproofing. I here the reason most don't use this is bc of the price (about twice as much) and not everybody has heard about it. If anyone knows more than this or can correct me please do. This is all hearsay info with no data to back it up.
If a 6637 were to get water on it I could certainly see it peeling apart from the inside. This is the reason some suggest using the 46637(???) that was designed for the marine applications. It has some sort of waterproofing. I here the reason most don't use this is bc of the price (about twice as much) and not everybody has heard about it. If anyone knows more than this or can correct me please do. This is all hearsay info with no data to back it up.
Posting Guru
Joined: Jul 2007
Posts: 1,730
Likes: 0
From: SE Wisco
The OP made no reference to the filter getting wet only that it would come apart at high boost so the comment with the comparison to the big rigs I believe is still valid , I used to get 75,000 miles or more out of the twin filters on my Pete and even though the were enclosed Im sure they got wet more than once . I believe but I'm not positive that most paper elements like these have some water resistant coating , I mean they won't take a full on blast from a water hose but running down the road in the rain it won't soak it up.
I will do some searching when I have more time on what the marine application number is. I know it was similar with one digit added or changed or something like that.
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Elder User
Joined: Sep 2006
Posts: 852
Likes: 0
From: ARIZONA
well, if you did want to change it, the alternative is the AFE version of the 6637,
im currently running one, and the sound is sweet, it also has a conical head vs. the flat top head on the 6637, pm me for details.
im currently running one, and the sound is sweet, it also has a conical head vs. the flat top head on the 6637, pm me for details.
Fleet Mechanic
Joined: Feb 2007
Posts: 1,852
Likes: 39
So the question might be, can this filter element withstand 15 psi under all conditions? I think it can.
Posting Guru
Joined: Jul 2007
Posts: 1,730
Likes: 0
From: SE Wisco
So the AFE...is that an oiled element? 
The AFE really increases the surface area with the cone top. I am probably going to look into the AFE when I FINALLY finish my cold air box.
The AFE really increases the surface area with the cone top. I am probably going to look into the AFE when I FINALLY finish my cold air box.
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