Motor Guard filters

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Nov 14, 2023
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Hi all! Recently purchased a 1971 F100 with a souped-up straight 6 300. Been sitting for over 20 years so slowly bring it back. I open the hood and lo and behold there are two filters bolted to inner fender well that I had never seen before. Upon further research it looks like there are motor guard bypass filters. A pair of them.

They are unhooked. Opened one up and pulled out what looked like an ancient roll of toilet paper.

Don't know anything about these at all or what the best application is for them or if they even have a use at this point. All new to me. Just curious for some information.

Thanks
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Bypass filters are for additional filtering so this guy would've definitely fit in on here. Not needed anymore as filters are leaps and bounds better now. I'd discontinue them. The media is likely highly compacted fine cloth.
 
Don't lose the internal parts, they are the secret to proper sealing of the "filter" roll (TP)

I still use a Motorguard on one of my Diesel Gensets. Works well for my application, as the engine has no filter and no way to plumb in a filter. But taking a little of the oil flow, into the filter, and out through a small orifice that flows oil on to a dry cam lobe, is helpful.

Lp6AC1y.jpg
 
Don't lose the internal parts, they are the secret to proper sealing of the "filter" roll (TP)

I still use a Motorguard on one of my Diesel Gensets. Works well for my application, as the engine has no filter and no way to plumb in a filter. But taking a little of the oil flow, into the filter, and out through a small orifice that flows oil on to a dry cam lobe, is helpful.

Lp6AC1y.jpg
Is that a Ralph Woods converted M30 or your own?
 
Hi all! Recently purchased a 1971 F100 with a souped-up straight 6 300. Been sitting for over 20 years so slowly bring it back. I open the hood and lo and behold there are two filters bolted to inner fender well that I had never seen before. Upon further research it looks like there are motor guard bypass filters. A pair of them.

They are unhooked. Opened one up and pulled out what looked like an ancient roll of toilet paper.

Don't know anything about these at all or what the best application is for them or if they even have a use at this point. All new to me. Just curious for some information.

Thanks View attachment 188557
It looks like the two M-100's are hooked together in tandem? I can't seem to figure out where the hoses are going, or is one the atf filter? If you are going to use these you will need 4 1/2" wide (height when installed) toilet paper, The M-100 is a compression type filter and will compress the 4 1/2" toilet paper down a quarter of an inch to 4 1/4" when the lid is tightened. Kirkland is easy enough to find.
 
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Hi all! Recently purchased a 1971 F100 with a souped-up straight 6 300. Been sitting for over 20 years so slowly bring it back. I open the hood and lo and behold there are two filters bolted to inner fender well that I had never seen before. Upon further research it looks like there are motor guard bypass filters. A pair of them.

They are unhooked. Opened one up and pulled out what looked like an ancient roll of toilet paper.

Don't know anything about these at all or what the best application is for them or if they even have a use at this point. All new to me. Just curious for some information.

Thanks View attachment 188557
Those look like the original compressed air filters. Thats the original color. The compressed air filters had no orifice and 1/4 inch pipe ports. The oil filters had about a 1/16 inch orifice and 1/8 inch pipe ports. Ran a compressed air Motor Guard for many years on a DC Case tractor.
 
Bypass filters are for additional filtering so this guy would've definitely fit in on here. Not needed anymore as filters are leaps and bounds better now. I'd discontinue them. The media is likely highly compacted fine cloth.
Actually full flow filters are about the same at cleaning oil as in the 50s. They arent supposed to clean oil. They are to remove engine damaging abrasives from the full flow of oil to the engine. To remove the smaller engine wearing abrasives and sludge you drain the oil or install a depth bypass filter The flat head Ford V8 canister filter on my Ford diesel tractor was designed to clean oil. It origionally used cotton. I converted it to use superior Scott 1000. John Frantz got his start in 1953 putting a Frantz canister inside the old canister filters. The proper way is without the Frantz canister. That would have put.him out of business.
 
Hi all! Recently purchased a 1971 F100 with a souped-up straight 6 300. Been sitting for over 20 years so slowly bring it back. I open the hood and lo and behold there are two filters bolted to inner fender well that I had never seen before. Upon further research it looks like there are motor guard bypass filters. A pair of them.

They are unhooked. Opened one up and pulled out what looked like an ancient roll of toilet paper.

Don't know anything about these at all or what the best application is for them or if they even have a use at this point. All new to me. Just curious for some information.

Thanks View attachment 188557
The compressed air filters had a powder coating and 1/4 inch pipe ports and no orifice. That color is probably from the 60s or 70s.
 
The compressed air filters had a powder coating and 1/4 inch pipe ports and no orifice. That color is probably from the 60s or 70s.
Saw this guy trying to argue with a guy that knows nothing about the filters. The guy says toilet paper isnt dedigned to filter oil. My 41 Dodge had a cotton filter element the same as the Luberfiner. I bought a big Wix 750 at O Reilly's about 20 years ago for a Cummins Fleetguard 750. It used pulverized newspapers and wood chips. Someone said Frantz was invented for VW beetles.VW beetles were Motor Guard territory.
 
Saw this guy trying to argue with a guy that knows nothing about the filters. The guy says toilet paper isnt dedigned to filter oil. My 41 Dodge had a cotton filter element the same as the Luberfiner. I bought a big Wix 750 at O Reilly's about 20 years ago for a Cummins Fleetguard 750. It used pulverized newspapers and wood chips. Someone said Frantz was invented for VW beetles.VW beetles were Motor Guard territory.
**** Cepec tires sold Motor Guards for off road racing which meant a lot of VW dune buggies. Dune Buggies and Hot VWs tested them and had a large article on them. Frantz was a bad design plus they recommded putting the Frantz upside down on the VW.
 
**** Cepec tires sold Motor Guards for off road racing which meant a lot of VW dune buggies. Dune Buggies and Hot VWs tested them and had a large article on them. Frantz was a bad design plus they recommded putting the Frantz upside down on the VW.
Because the old Motor Guards filtered from the bottom up you had to tilt them so the big stuff wouldnt gravity back to the engine. Kind of like a gold pan.
 
Those are MotorGuard M100's, very similar to a Frantz filter. I use one of these on my Ford 5R110 transmission.:)
Those are the origional Motor Guard compressed air filters. They were designed to use 2 ply toilet paper. Had 1/4 inch pipe ports
The lube oil filters had 1/8 inch pipe ports a restrictor and no coating. That color was from the 60s or 70s. Motor Guard was the only one safe to use for compressed air. Compressed air can hurt you.
 
Those are the origional Motor Guard compressed air filters. They were designed to use 2 ply toilet paper. Had 1/4 inch pipe ports
The lube oil filters had 1/8 inch pipe ports a restrictor and no coating. That color was from the 60s or 70s. Motor Guard was the only one safe to use for compressed air. Compressed air can hurt you.
Did these early compressed air filters have the metal or plastic cores? Were they metal for a short while?
 
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