6637 install trouble
Thread Starter
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Cargo Master
Joined: Jan 2001
Posts: 2,726
Likes: 5
From: Slatington, PA
6637 install trouble
Do you have to take out the entire air box (under the batt too?) to get the filter to fit? Mine is wedged between the fuse block/master cyl and the front screws for the base of the air box (the ones right behind the batt). It wont sit low enough to close the hood either. Any tricks or suggestion?
Thanks guys
Thanks guys
Lead Driver
Joined: Dec 2003
Posts: 5,250
Likes: 42
Not the part under the battery. At least, I didn't have to. I just removed the sock air box, zip tied the sensor out of the way, and set the filter in. Post some pics of your setup so we can see if there is anything you missed.
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Cargo Master
Joined: Jan 2001
Posts: 2,726
Likes: 5
From: Slatington, PA
Ok, I'll take some tomorrow. I couldnt leave the 6637 in because of the not fitting issue. I had to actually wedge it between the battery and fuse block/master cyl (after denting the filters wire mesh slightly).
I'm planning to fab up a battery mount and just remove the whole darn air box all together. This was just another frustrating thing tonight. My dad and I replace the fuel pump in moms suburban (dropped the tank) and the darn thing didnt work. Turns out the ground broke after we installed it, but before the engine could fire. Let me tell ya, you hook some jumper cables between that and one of our trucks and the engine spins like you dont have spark plugs in
I'm planning to fab up a battery mount and just remove the whole darn air box all together. This was just another frustrating thing tonight. My dad and I replace the fuel pump in moms suburban (dropped the tank) and the darn thing didnt work. Turns out the ground broke after we installed it, but before the engine could fire. Let me tell ya, you hook some jumper cables between that and one of our trucks and the engine spins like you dont have spark plugs in
Last edited by twags6; Oct 21, 2007 at 11:05 PM.
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
Look through my gallery to see my install. I, too, have to maneuver mine into just the right position in order for the hood to close because I did not remove the bottom of my filter box either.
What works for me is to nest the far end of the filter at an angle in the bottom open area of the stock air box, and then slide it as far toward the fender as possibile while keeping the end of the filter in the "nest". The hood should then close well.
What works for me is to nest the far end of the filter at an angle in the bottom open area of the stock air box, and then slide it as far toward the fender as possibile while keeping the end of the filter in the "nest". The hood should then close well.
Master of Strokes
Joined: Mar 2007
Posts: 6,808
Likes: 25
From: CA
I just did this saturday. I took of the stock air box cover the top part. Then I threw the old air filter out of there. I took the batterie out and the took out the lower part of the air box. 4 screws then put the batterie back in. Then I cut a 3 inch piece of 4 inch Exhaust pipe to help the filter stay on to the intake tube put the filter back in and I was done,
Nick
Nick
Thread Starter
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Cargo Master
Joined: Jan 2001
Posts: 2,726
Likes: 5
From: Slatington, PA
Originally Posted by weekendwarriorfsw32
I just did this saturday. I took of the stock air box cover the top part. Then I threw the old air filter out of there. I took the batterie out and the took out the lower part of the air box. 4 screws then put the batterie back in. Then I cut a 3 inch piece of 4 inch Exhaust pipe to help the filter stay on to the intake tube put the filter back in and I was done,
Nick
Nick
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
I removed the bottom half of the air box, didn't use an piece of exhaust pipe, and it all fit perfectly.
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Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Yeah, somethin's not right. Mine fit right in place, no problems with clearances. Mine does touch the hood insulation, but no problems with it closing at all. What's the diameter of that filter? I wonder if it's possible he got the wrong one (even though it may have been labeled correctly).
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Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
You're right, Joe... if he got the one that folks refer to as the BHAF (Big Honkin Air Filter), I believe that its was about a good 1-2 inches larger in both diameter and length than the 6637 that we're all using.
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Actually, ours is longer, but the Cummins BHAF is larger in diameter. From FleetFilter.com:
-----------------------------------
Cummins "BHAF":
Part Number: 42790
UPC Number: 765809427907
Style: Air Filter
Service: Air
Height: 11.880
Outer Diameter: 10.500
Inner Diameter Top: Closed
Inner Diameter Bottom: 4.000
Ends: Plastic
CFM: 680
------------------------------------
The 6637:
Part Number: 46637
UPC Number: 765809466371
Style: Air Filter
Service: Air
Media: Paper
Height: 12.380
Outer Diameter: 8.500
Inner Diameter Top: Closed
Inner Diameter Bottom: 4.000
Ends: Metal
CFM: 425
-----------------------------------
Cummins "BHAF":
Part Number: 42790
UPC Number: 765809427907
Style: Air Filter
Service: Air
Height: 11.880
Outer Diameter: 10.500
Inner Diameter Top: Closed
Inner Diameter Bottom: 4.000
Ends: Plastic
CFM: 680
------------------------------------
The 6637:
Part Number: 46637
UPC Number: 765809466371
Style: Air Filter
Service: Air
Media: Paper
Height: 12.380
Outer Diameter: 8.500
Inner Diameter Top: Closed
Inner Diameter Bottom: 4.000
Ends: Metal
CFM: 425
Thread Starter
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Cargo Master
Joined: Jan 2001
Posts: 2,726
Likes: 5
From: Slatington, PA
Well if the info Izzy has is right, mines the bigger one cause it has plastic ends. I'll have to go out to the garage and measure it later. I ordered the 6637 from the napa parts desk, and it came in a box labeled that too. hmm......
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
Can't go by the metal/plastic ends info... you're going to have to measure it to know for sure.
I just received two 6637's a couple of weeks ago from FleetFilter, and they have the same plastic ends that my first one had when I installed it back in January.
I just received two 6637's a couple of weeks ago from FleetFilter, and they have the same plastic ends that my first one had when I installed it back in January.
Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
Twags6 - I had to remove the bottom of mine also.I tried every which way to make it work without removing it but no luck. I did the ccv mod @ the same time so this may have had somethin to do with it. Some trucks fit up alright without removing bottom as you know. Good Luck. BTW Iused some 4" pieces of stainless exhaust as a coupler both @ the filter and @ the ccv replacement. If you need some 4" SS let me know and Ill get some to you .I had a rough time finding some till one of the guys on this site sent me some .
Last edited by guitarpicr; Oct 23, 2007 at 12:11 PM.