not that old
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i have a 8BA motor and want to install a oil filter. i am not sure where to connect the discharge hose from the oil filter to the engine. any ideas?
help with a oil filter
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19Fordy
Well-known member
Here's a photo of the two oil line holes in the 8BA block. here's video showing complete system.
https://www.youtube.com/watch?v=XPGUhMR2K2E and again
http://www.jalopyjournal.com/forum/threads/rebuilt-239-8ba-flathead-ford-v8-engine.937166/
https://www.youtube.com/watch?v=XPGUhMR2K2E and again
http://www.jalopyjournal.com/forum/threads/rebuilt-239-8ba-flathead-ford-v8-engine.937166/
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JSeery
Member Emeritus
Here are a couple of clearer drawings. The one with the color shows the oil main line connections as a fairly large red trapezoid near the side of the oil pump shaft. The oil return line is the green line near the center of the block/oil pan line. The other diagrams is an add-on system that had the return to the front cover, but you can see the rear fitting with the oil pressure sender and the oil pressure line to the filter.
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19Fordy
Well-known member
J: When I had the factory oil filter on my 8BA it was hooked up like the the filter and oil pressure sending unit with the "TEE" fitting shown in the first (RED) photo. The green oil return line from the bottom of the filter screwed into the other threaded hole near the bellhousing. There was no return line that attached to the pan. Thanks for posting better photos.
JSeery
Member Emeritus
If it was connected that way it was not working!! That would have both ends on the oil filter lines connected to each other. Those are just two holes into the same passage. The only way that will work is with what is often called a 95% filtration system, which involves adding an internal plug and drilling an additional hole. There is no way a by-pass system could work that way.
Another system was a military setup that was also a 95% type setup. The 95% modifications depend on the additional hole and a plug of some type in the oil passage.
There are three different locations that have been used for the filter return line that I am aware of: the fuel pump stand using a special drilled bolt, the front cover also using a drilled bolt and the oil pan area. Apparently some blocks had a provision in the block just above the oil pan and some oil pans had the fitting in the pan itself.
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51 MERC-CT
Well-known member
34PKUP
Well-known member
Having trouble figuring out how these responses answered such a simple question
JSeery
Member Emeritus
They don't!
I am not expert on EVERY 8ba block and have no idea if they all have the return line hole in the block, but do know that the return line is the easiest to setup going back into the center of the oil pan. IF the block has the return port that would be the only logical place to connect it. I have seen engines with the return connection in the oil pan itself, but don't remember the block/engine years.
Was also address the implication that the two holes at the rear of the block could be used as an in and out connection point on a by-pass filter. Again, this was claimed for an 8ba block.
So, did ALL 8ba engines come from the factory with the oil return provision on the lower block rail as stated by Martin and 51 MERC-CT? I have always worked with 59a (or earlier) blocks.
I am not expert on EVERY 8ba block and have no idea if they all have the return line hole in the block, but do know that the return line is the easiest to setup going back into the center of the oil pan. IF the block has the return port that would be the only logical place to connect it. I have seen engines with the return connection in the oil pan itself, but don't remember the block/engine years.
Was also address the implication that the two holes at the rear of the block could be used as an in and out connection point on a by-pass filter. Again, this was claimed for an 8ba block.
So, did ALL 8ba engines come from the factory with the oil return provision on the lower block rail as stated by Martin and 51 MERC-CT? I have always worked with 59a (or earlier) blocks.
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Ronnieroadster
Well-known member
The answer to your question is yes all Ford and Mercury 8-BA blocks have the 1/8 inch pipe thread return hole as shown by 51 MERC -CT
JSeery
Member Emeritus
Then, that would be the obvious place for the return line LOL
When I rebuilt my 8BA I assumed the return hold was to the pan (like my 81A engine) and bored a hole in the 8BA pan without thinking why there might not already be a factory hole for that purpose ...
So, I have the return line connected to the block as it should be and a plugged up hole in my pan - more thinking and less haste = more speed ...