On some filter cans the stand pipe and fill plug are pressed in place.. they can loosen over time and weep oil. I have had to re-seat the center stand pipe and its not hard.. get a piece of pipe, fit it over the center pipe and put the filter on a metal plate... tap it till its firmly in place. You could also silver solder it... but after 3 years it has not leaked.
There should also be a fiber/copper washer under the lid bolt. That is also a place for oil to leak. Most of the lids that leak will have pits on the bottle of the lid from old cork gaskets that have rusted the lid. You can use RTV to fill in the pits, or use a softer rubber to get a better seal.
Last edited by pfarber; 03/24/2015 5:08 PM.
