I second Kevin's seal driving method. It has worked well for me on a wide variety of small and large seals. Just make sure that the small piece of 2x4 or 2x6 (for larger seals) is larger in dimension than the seal. Once aligned, a single well placed blow with a 3 pound hammer will do the job.


1941 Chevy 1 1/2-ton WW2 4x4 dump truck
In the Stovebolt Gallery
Lots more pictures