Motor Guard By-Pass Filter

[Turbo67]

Hello everyone,
I have begun modification of a Motor Guard Filter for automotive oil by-pass usage. I have lurked here for quite awhile, spoke / texted Detroit Garage, watched his videos, downloaded the hand sketches of modifications, etc. I purchased a "medical version" of the filter and it is grey and came with the 4-1/4 tall filter. In the pictures, you can see where I machined a tube, very similar to what I learned to do on here. I also installed a #221 o-ring to seal against my tube.
Now to my question / issue:
The tallest filter I can find is 4.1" and that is a Scott 1000. The rest are 4" or even slightly less. Installing one of these "short" filters, I can easily blow into the in or out port with my mouth and I feel certain that air is making its way around the filter. My suspicion is that since the toilet paper is not tight against neither the top or bottom of the housing, it is not being compressed enough to expand and seal. When I install the supplied 4-1/4 filter, I can feel resistance to flow when I blow through it. I have one roll left of Scott 1000 that is 4-1/4" tall from a few years ago, when installing it, I can certainly feel difficulty blowing through it as if it has the proper resistance.

What are you guys doing about these new short rolls to address this issue?

 

[jimmyjamesndt]

They take 4 1/2" tall paper, I don't see the imprint on your roll in the picture, the 4 1/2" rolls compress down to 4 1/4". I have two Motor Guard M100's. You can still run the shorter paper by sending the flow up the center tube just like a Frantz.

 

[Turbo67]

They take 4 1/2" tall paper, I don't see the imprint on your roll in the picture, the 4 1/2" rolls compress down to 4 1/4". I have two Motor Guard M100's. You can still run the shorter paper by sending the flow up the center tube just like a Frantz.

Yes, agreed, these short rolls are not imprinting with the top and bottom flow channels.

Who carries 4-1/2 tall rolls that are tightly wound?

Thanks!

 

[jimmyjamesndt]

Yes, agreed, these short rolls are not imprinting with the top and bottom flow channels.

Who carries 4-1/2 tall rolls that are tightly wound?

Thanks!

I have a couple cases of Camco paper that is 4 1/2" tall and firm, but it has been discontinued and is now sold as a 4" paper, this was two years ago, don't know if you may be able to find a RV shop that has old stock, maybe? A310 uses Kirkland, it's the right height, it's a softer roll, but it compresses and looks like it will work not to bad, I have only dry fitted Kirkland, we use it around the house. The Frantz elements are 4 1/2" tall, the diameter may be a tenth of an inch smaller but it should still seal around the outside, I am unsure if you will be able to compress the Frantz paper, something I always thought of trying if I wanted a super firm 4 1/2" paper.

 

[A310]

Nice job.

 

[jimmyjamesndt]

Yes, agreed, these short rolls are not imprinting with the top and bottom flow channels.

Who carries 4-1/2 tall rolls that are tightly wound?

Thanks!

The Camco paper is 2 ply 500 sheet, there is 280 sheet 1 ply and it is loose wound garbage, you definately don't want the 1 ply.

 

[Turbo67]

Thanks everyone, I will check around for the Camco and Kirkland.

 

[Turbo67]

So I found the Kirkland 4-1/2 long rolls at the local Costco. Unwrapped about 14 rounds of tissue from one and squeezed the center with clear boxing tape to help with the center bulge. Very resistant to blowing through this setup with my mouth. I gave it a underwater 15 - 20 psi air pressure test and my setup was leaking where the upper and lower half seals against the black rubber gasket. Upon inspection, the inner cardboard tube was bending over and getting between my machined aluminum tube and the filter body itself, preventing the center seal from being squeezed properly. I removed about .050" off my tube and all is well. Just thought I would put this out there in case anyone has a similar issue. Next step is to fabricate the restrictor.

 

[jimmyjamesndt]

Now all we have to do is run oil through it!

 

[Slagathor]

Could you by chance make a list of the parts you made/used to convert this?
I did run across a Google drive that had them but couldn't get the information.

 

[Turbo67]

I will make a sketch of the part I machined and post it here.

 

[Turbo67]

Could you by chance make a list of the parts you made/used to convert this?
I did run across a Google drive that had them but couldn't get the information.

My adapter below that I machined is based on the information obtained from this site, Detroit Garage and the Google file sharing site with pictures and details of previously modified M30s, M60s, M100s. Note, my dimensions are pulled from the adapter I machined to fit my M100D. My Motor Guard Filter has been commented to be somewhat of a "mid" run change. The point here is, you need to measure your filter housing dimensions and use my sketch as a reference. Also, while I have air pressure tested for leaks, and now pass, I have yet to actually put this into service. I will be fabricating the restrictor orifice next as soon as my items arrive in the mail.

 

[Slagathor]

AWESOME!!!

 

[jimmyjamesndt]

Ralph Wood had a flat washer at the top of the M30 to keep the tp core from blocking off the flow, is this not needed with the M100D? Looks like there are little pads for the plastic insert just outside the castle, does the tp core sit on these pads?

 

[Turbo67]

Ralph Wood had a flat washer at the top of the M30 to keep the tp core from blocking off the flow, is this not needed with the M100D? Looks like there are little pads for the plastic insert just outside the castle, does the tp core sit on these pads?

Thanks for the question! You have just clued me into why Ralph Wood had that washer and lockring in place. I need physical items in hand to brainstorm. I have a hard time with mental envisioning. This has caused me to give more thought to my aluminum center tube. As of this question, using an empty center tube of scott (slightly larger inside diameter) I see where it could seal right down outside the castle under the right (wrong) conditions. I cut a plastic prototype washer out of some garage scrap and I now understand the flow path. I am considering some Vee notches cut at the end of the center cardboard of the TP to alleviate this possibility without the washer. But I think I like Ralph's idea better. Just ordered what I think is the correct external retaining ring (1-5/16) and some purchased possibilities for the washer all from McMaster-Carr. I will update once this stuff arrives and I go through the motions of evaluating it.

 

[Turbo67]

AWESOME!!!

Hold off on using those sketches, jimmyjamesndt has brought a potential issue to my attention. See above.

 

[Turbo67]

Concerning the sketch and parts list above, I will be modifying the sketch to shorten the smaller end of the machined aluminum tube by approximately .175" to accommodate a 1-5/16 External Retaining Ring, McMaster Carr p/n 97633A350 at .050" thick and a "washer" I also purchased from McMaster-Carr: 18-8 Stainless Steel Wide-Rim Ring Shim1/8 thick, 1-3/8" ID, 2-1/8" OD, P/N 96853A415. Hope to have this completed at some point after Labor Day. Does anyone know how to delete an attachment or post? I would prefer not to have something posted that is "wrong".

 

[jimmyjamesndt]

I did some bench experimenting today with the M100 and Kirkland 380 sheet paper, using a sewing tape and pie R square formula I arrrived at 4.3" being the max diameter that fits properly in the housing, using the last sheet folded at a 45 degree angle, the paper did not pinch in the gasket. There is a long ago post by Ralph Wood were he sort of regretted telling people to wrap oversized rolls with shipping tape, explaining the paper should not be tight against the widest part in the housing as the gap introduces more filter surface area, he said the engineer who designed the M100 told him of the benefits of running slightly smaller diameter paper.

 

[jimmyjamesndt]

Here is the fold if you were wondering what it is.

 

[jimmyjamesndt]

OP, any updates on your M100D ?