While waiting for seals and gaskets to arrive I thought I would finish up my oil filter by adding a magnet. Bought a three pack of 25mm x 3mm round neodymium magnets from eBay. Pretty straight forward process: 1" diameter end mill to 3mm depth but instead of just JB welding it in place I added an 8-32 flat head screw as insurance it stays put.
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Drill, tap and counter sink so the head is flush with the surface. I did seat the screw in a bit of JB weld to make sure it stays put and because it is a thru hole into the oil passage to seal things off.
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Added JB to the circumference of the spot face to hold and seal the magnet.
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Last thing was to drill bolt heads so they can be safety wired.
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