1941 Ford Flat Head Oil Filter Canister

Hi again Kube, a double big thank you for pictures you posted for me on the hoses needed for the oil filter canister hook-up for the 41 Ford. I do appericate.

Randall
 
Hello too all,and a big thank you for the help you gave me on getting my oil filter canister installed on my 1941 ford. It is on and working, had some leaks at first but all ok now. I know the onwers manual says 5 qts. of oil to full, but is that with the filter or with out the filter?. And on the dip stick when it shows danger, how many qts. to full when car has filter?. All help appreciated.
Randall
 
Randall,

I am looking at a website called Restore your ford.com and the capacity shows 4 quarts and the engine diagram does not show a by-pass filter. So my guess would be 5 with the filter in place.

I am sure some others will chime in to help you but I think my 47 takes 5 and it has the by-pass filter.

I always treated the bottom of the safe zone as being 1 quart low. Hope this helps sir!!

http://restoreyourford.com/v860spec.shtml

Kevin
 
Kevin, now ya done it! Sorry to tell ya, you stepped in the middle of something dark and warm that time. You're gonna get a lecture I betcha, but not from me. I'm on your side!
 
Randall Hornback said:
Hello too all,and a big thank you for the help you gave me on getting my oil filter canister installed on my 1941 ford. It is on and working, had some leaks at first but all ok now. I know the onwers manual says 5 qts. of oil to full, but is that with the filter or with out the filter?. And on the dip stick when it shows danger, how many qts. to full when car has filter?. All help appreciated.
Randall
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Okay, I'm not afraid to "take the bait". Perhaps because I may be (or so it seems) the only guy that actually has seen the engineering drawings of the oil pan and the respective capacity.
It's five (5) US quarts with or without filter.
 
Kube: Looks like the early 40 is on the right, and 41 on the left. At least the right shows the "banjo combination bolt-fitting" and its special oil drain line.
Am I correct, or wrong? Thanks for your pics for the two different styles as they show the parts involved.
Lincoln.
 
Lincoln said:
Kube: Looks like the early 40 is on the right, and 41 on the left. At least the right shows the "banjo combination bolt-fitting" and its special oil drain line.
Am I correct, or wrong? Thanks for your pics for the two different styles as they show the parts involved.
Lincoln.
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The early style hoses and fitting (to fuel pump stand) are on the left. This method was used up until approximately the beginning of May, 1940.
After that, the second and final design / routing came in to being. The high pressure line remained identical to the early version while the return line was changed significantly. It (return line) was now routed to a "special" bolt that held the distributor in place.
 
I have several of these oil filter canisters and all of them have a small pinhole in the center pipe. I haven't measured it, but 1/16" would be a reasonable guess. This should restrict the flow, so I don't understand the need for another restriction. Someone please explain.
Larry Young
 
Cartravel said:
I have several of these oil filter canisters and all of them have a small pinhole in the center pipe. I haven't measured it, but 1/16" would be a reasonable guess. This should restrict the flow, so I don't understand the need for another restriction. Someone please explain.
Larry Young
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I am not so certain I can explain the physics of it. However, i can tell you from numerous first hand experiences, the pressure side MUST be restricted.
 
If you only had one on the inlet, the canister wouldn't fill much past the hole in the center tube (not using the whole element). If you didn't have one on the inlet, you could briefly starve the bearings on start-up with a half-full canister.
 
Think the first line should read "outlet" and good answer!
Edit: Guess I need to read better or take my nap when I should instead of trying to read with my eyes half closed!!
 
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No, it's right. If the center tube had a big hole, the oil would drain out faster than it was going in.
 
Kube said:
Hi Randall,
Do you have the correct line for the return oil? It has what many call a "banjo" fitting on the distributor end. Along with a special "hollow" bolt and a pair of brass washers, a guy would replace the upper bolt on the right side of the distributor. Same bolt that holds the ground strap of the condenser.
That .060" restricted fitting is necessary in the pressure side of the line. Without there WILL be a drop in oil pressure.
I can post a picture of the return line an early '41 requires if you so desire.
The supply line goes between the side of the filter and the threaded hole next to the oil pressure sending unit. In '41 the horizontal hole was to be used.
Click to expand...

My 8BA filter has no restrictor on the inlet to the oil filter cannister and there is no noticeable change in oil pressure with or without the oil filter. There are the two restrictor holes in the centre tube through which the oil returns from the cannister to the sump. I'm wanting to know why Ford designed restrictors both into and out of the filter. Why have one going in and two coming out?
 
I'm fixing to change my oil and filter on my 41 coupe, I'm only going to drain oil and filter. Put in new filter and oil. I've looked at the filter lines, the filter inlet comes from the block beside the oil pressure sending unit into the backside of filter can, goes out the bottom center of the filter can into the left side of the oil pan. My oil pressure is 50+ on start-up and drops to 15+ when hot at idle, running down road it's about 30. Don't know when oil was last changed, engine looks to be recently overhauled. Don't know if it's early model or late, BB75 is stamped on upper firewall. Al
 
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