Front crank seal install tool
 

I'm looking for the specs necessary to build a front crank seal install tool. Robert Spinner has made some that are for sale, however he can't seem to keep them in stock. Here is his link Robert DIY special tools and services.

I would also like to build the camshaft seal tools as well, both front and rear as well as vvt and non-vvt.

I have a good friend with a metal lathe that's willing to show me how to use it. I'm getting tired of replacing the same seal over and over because I don't have the proper tool.

Thanks for your help