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Old 11-04-2019, 06:20 PM   #4
JSeery
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Join Date: Nov 2012
Location: Wichita KS
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Default Re: late flathead oiling?

Need to be sure you understand how this works and you have it correctly, a mistake will lead to a new rebuild! It is my understanding that this OEM arrangement did not have the horizonal passageway threaded, they used a special vertical fitting and an external valve arrangement. The ball and spring is a relief valve if there is an obstruction in the filter itself. The modern modification (often referred to as a 95% filtration) involves tapping the horizonal passage and installing a grub to block oil flow. This setup does not have a by-pass valve except for one within the filter itself.

Sounds like that is where you installed the 7/16 grub, just interesting how the threads got there in the first place and why you would need to sand the threads down.
Attached Images
File Type: jpg Oil Fitting.JPG (42.4 KB, 117 views)
File Type: jpg Oil Fitting 2.JPG (35.9 KB, 106 views)
File Type: jpg 95oilplug.jpg (50.9 KB, 98 views)
File Type: jpg 95 percent flow.jpg (32.1 KB, 90 views)

Last edited by JSeery; 11-04-2019 at 06:30 PM.
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