6637 filter attached directly to the intake tube= dirt in intake, from dimpled connection.

For nearly three years I have been running my 6637 attached directly to the intake tube. I have been using a 5 inch hose clamp to secure it on there. Well, I pulled my intake tube along with the 6637 attached to it off. I shined a flashlight down in the tube, and viewed dust in the intake. I then looked farther down in the tbe to where the filter attaches, and noticed that where the the 6637 and the intake tube meet, was dimpled form the flat part of the hose clamp crushing the 6637.

Lucky I cuaght this. It was too late at night to be taking pics. But I dissasembled the whole intake, cleaned it ran to Home dept and picked up a PVC DWV 3" (4"OD) coupler and two new 5" hose clamps to make a secure connection for the 6637.

Going to do an OA next oil change to see if any damage is present. I think I caught it in time becuase the intake wheel looks brand new still and I checked the blowby at the filler cap, and no change, very little. Just a little paranoid. I only have about 3,000 miles on this 6637 since last change and even at that, only very very fine dust particles made it in.

So, in a nut shell, if your not running a coupler between the 6637 and your intake tube, the flat part (screw part) of the hose clamp is probably crushing the 6637 at the connection.

To think, this all started when my wife complained that the batt light was going off when she was driving it. I took the intake tube/6637 off in one piece (which I never do) to save time when I was tracing wires. Anyway, I think the truck was giving her morse code that it was getting dirty air.

 

How's the turbo vanes look? No pitting or bending I hope.

 

None, I caught it in time.

 

Good find Tim. When I put the 3" DWV coupling on, I used a drimmel tool to sand off the ring in the middle of the inside of the coupling. I also like banding the filter on the coupling, instead of banding something over the filter neck.

 

I had mine setup the same way as you did but once I needed to change the filter for the first time I found at a local Pepboys in the ricer section an aluminum tube that is made for this type of thing. its a 4" aluminum tube thats 4" long. It works great for bypassing the the CCV as well. The tube fits real tight on the inside of the the 6637 filter and i just take a peice a of wood, and pound the aluminum tube in with a hammer, seals up great that way. The manufacturer of the tube was Spectre and its about $15 per tube. Worked great and looks good too

Here is a link to pepboys with the tube. http://www.partsxdirect.com/asearch.aspx?aid=547

 

Ditto. I actually researched and found one of your old posts, and used it to make a parts list. I also had tofire the dremel up to get rid of the mold nipple like you mentioned.

I agree, it is better to band the filter on the coupling than to band the intake tune on top of the filter. Much more secure connection. Doing it like I was was bad news.

On edit, I didnt sand down the ring on the inside of the coupler. It seemed to small to cuase any concern. But I did sand down the mold nipple on the outside of the coupler to ensure an air tight seal.

 

Doug- nice find on the adapter! I have some leftover 4" exhaust tubing I'm going to cut up and make a couple adapters out of (CCV and 6637) when I find time.

 

That will work well too I bet!

I just tried the link I posted and it didnt take me to the part. I should have tested it first.

Anyway, if you click on the link, the part # for the air cleaner tube is 9709 and the one for the CCV is 9719.

 

I have mine directly to the filter, but I put a thick bead of black silicone around the connection(outside)to seal any possible gaps and add a little extra holding power. It will be a pain when the time comes for a new filter though.

 

I have about a 6 inch section of 4 inch exhuast pipe between my filter and intake tube. Works great!

 

I did my 6637 mod the same day I did the muffler deleate. Had a local muffler shop do the deleate because they weld for a living, all I do is join metal together. I got a section of 4 inch tube and cut it to size, leaving about one inch exposed between the filter and intake tube. I like the way it clamped up tight, recomending this as a sure fire way of ensuring nothing gets in without passing thru the filter first.
Now I'm saving for the leveling kit (might just go with the shackels).

 

If the intake tube and the filter have the same size opening, how do you get the tube over the filter? I never thought it was possible and you HAD to use a short piece of pipe. Good find though, never know what consequence a small thing can have.

 

How'd you mount the filter minder in that pipe?

IIRC, the early 99's had a different intake pipe off the air box that had a slightly larger opening and could be stretched to fit over the 6637.

 

No, the earlies had to have a length of pipe because the intake tube was much shorter. It had to have a 120* bend to it as well to put the filter in the same place as the later trucks.

I had mine over the filter neck for almost a year with no problems. I'm thinking maybe it was over tightened. I have since putin a piece of pipe though. Left over 4" SS exhaust works perfect for there and the CCV replacement coupler. If you have CC LB, you won't have any extra pieces though. The short beds like mine leave about 16" of pipe left over.

 

I just drilled a hole and put the little grommet in there. I did the same with the air temp sensor, its on the bottom out of view in the pic