Bypass oil filter connections.

Mart

Mart

Well-known member
Hello. My friend Lars asked me if I had connected my oil filter correctly. The answer is I don't know.

I have a beehive filter and the side port is labelled "out".

I didn't use the beehive, I used a French military filter housing that looks identical to Ford truck types. Illustrations I have found appear to feed in at the side and out at the bottom.

So my question is, should the oil be fed in at the bottom, or at the side, or does it not matter?

I show my setup in my latest video.

https://youtu.be/Tmo4agUiX5U

Thanks in advance for any advice offered.

Mart.
 
Oil flow in the original filter was fed in the side port, and out thru two holes in the center tube (see pic) and then gravity drain out the bottom of center tube. Don't know if it would work in reverse.
 

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I've never seen the inside of one of those Beehives, same design and similar filter cartridge as the Ford units ?
 
Sorry about my OCD Mart ;-)
This is how it was mounted on the 46 engine.
US.flathead.jpg



But I may stand corrected, found this French Flathead, you said you used a French Canister, didn't you? Seams that one uses the side for the feed line from the oil pump:

french-flathead.jpg



So i learned something today too ;-)
 
Seems according to the diagram above that the restriction is in that oil filter housing center tube and does not need to be in a external fitting?
 
It does not make sense to restrict oilflow into the filter as the entrance could get blocked by dirt. The oil should move freely into the filter and once through, the now clean flow of oil is restricted at the outlet of the filter housing via drillings or jets. I have fitted the french housing as well, gives me one more liter to circulate. IN is on the side, OUT is on the bottom of the central tube. After an oil- and filterchange you should of course fill the filter housing up to the restrictor holes in the central tube as otherwise the engine will see almost no oilpressure before the pump has filled the housing.
 
Guys, just to clarify a couple of things here...

The restriction Ford designed the restriction to be placed in the supply side. The factory spec for this restriction was a nominal .060".

The illustration posted by Mr42 is actually a one-year thing... 1941. In '42 through '48, the dipstick boss had a threaded hole added for the return line fitting. In '41, there was a separate fitting near the front of the il pan as shown in that illustration.
 
Thanks for all the input, fellas.

I just came in from reworking the filter system.

I used some different fittings, made up some new pipes and reversed the flow so the in feed is at the side.

I am happier now with the new setup. I'll show it in a video in good time.

Mart.
 
The oil pressure should be from the outside inward on the the filter element as the center core tube of the filter is always made of tin to withstand the pressure. The outer shell is sometimes made of thick paper/cardboard. In the 70s I saw one hooked up backwards in auto shop. It had blown the paper filter apart and pumped it back into the pan and throughout the engine .(not good , plugged sump screen burned up bearings) Tim
 
^^ Very good point made there, Tim. I never thought of that. I have it plumbed outside flowing in now.
 
Mart, since you were just plumbing the canister let me ask a question: Is the bottom port on the canister 1/8" NPT?

(I am looking for the 90-angle fitting for the bottom of my filter canister, which will take the original style drain hose used in 1940. I found a good NORS hose on ebay, found a reproduction banjo bolt from Third Generation, now looking for the angle fitting.)
 
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