Originally Posted by Lubener
Interesting. I am a little leary of that fiber washer under the bolt holding up to the higher pressures.
On mine it is a double sided copper washer that has a fiber interior. It looks very original, its probably from the 1940's, been squashed good but it still seals, no leaks.
I have 3 similar canisters on my 1970 boat. They look different, are wider than the 8N and the top is very different shape, uses a much wider rubber gasket. They can use the same exact filter number, Fram C3P. These 3 canisters do not have a drain. Neither did the 8N I got off Ebay, I had to drill and tap a hole. Later model 8N canisters did have a factory oil drain.
None of them leak, I have not replaced the seal on the bolt. I think one of the bolt seals is a plain copper washer, and one might be a steel washer, or they may not even have a seal washer. The bolt is very smooth and flanged where it meets the top.
Anyone know who made these? Someone suggested Purolator.
And remember, I have reversed the oil flow on the 8N from the original design, so as to work with a TP roll filter.
And I read on a tractor forum, the store bought filters with a metal outer case such as made by WIX 51010 (with a crappy 32 micron rating though, Donaldson is at 20, and Fram C3P used to be 2 to 5 before they redesigned it cheaper) , can have input and output lines switched.
Switching the oil flow direction is better, IMO, since you dont have old stale oil sitting in the canister. The oil drains out the added bottom fitting I drilled and tapped on the bottom where it ramps up. I matched the later versions of the 8N filter canister so my added hole is in the same spot.
pictures show my un modified boat filters. I think being wider, they may not work with TP. Someday I will check that. Maybe blue shop towels.
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