I've been asked to share my method and photos for converting an Oil-Bath air cleaner to one that will accept a paper element. The air cleaner in these photos is from a 55 tudor Mainline that my dad recently sold. This is a VERY SIMPLE approach to this conversion and only takes a few minutes. Here it is: Step one: On the lid, cut away the housing that contains the mesh filter. Leave enough material (as shown in the photo) to create a seal on top of the paper element. It's important that you make this cut nice and straight.