Possibly a small amount of high temp silicone sealant on the adaptor threads on assembly if it is leaking from there, or a Viton O ring under the adaptor, as with the original plug? Don't over tighten it or you will be in danger of pulling the alloy case threads again.

As for wire locking, I would lock the adaptor to the oil pressure switch by drilling a hole across two flats, then that will stay locked and not require disturbing when removing the drain plug. Finally lock the drain plug to the adaptor, always "pulling' in a tightening direction.


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