I would not do that as the cold will only make the rubber harder and less resilent to enter the machined bore of the hole. The principle of using cold or hot oil baths ,etc., is for bearings & such that have a mass of metal, not a rubber encased sheet metal thingy with a plexiglass lens. As to steptoe: Sure, it's easy to smash the plastic lens but I was avoiding prying on the edge of the painted aluminum case as he did. I have also read of others that were able to pull them using only the plastic lens for a pull, so I tried that first. I can assure you that this one didn't come out that easily as already stated. I used a 1/8" thin piece of oak and when levering the edge just turned outward and the seal stayed in. After much formal training & many years of wrenching in a variety of settings(I could say more here but my ego is OK at that) I found it to be hard to remove! I'm glad to know steptoe is so good that all things come easy for him. He probably would have been one of my star pupils when I taught Auto Mechanics in the 70's. Also , I wouldn't reccomend using the old one to install as it is not only made of flimsy sheet metal it is not so thick, thus gives you no length to pound on. It is important to have the new part square with the hole and avoid malforming it. Use a socket like already stated to install safely. My only point in posting was to make it clear that they will not always come out so easily, so be prepared. This was already said by others that have installed many of these, i.e., that they can be difficult.