I know and understand that there will never be a perfect seal on the firewall to cowl. However, the seal that I had was less than terrible. There was a noticeable leak of fumes and (cold Wisconsin) air into the cabin. Much more than was on my previous plane.

This is my fault. I did not spend the time I should have on the firewall and cowl. The original builder used expanding foam to seal the very poorly fit cowl. I chose not to rework the same cowl and firewall to fit properly. (...and I can't stand the idea of using great stuff to seal the gap!)

My idea is coming together and I'll get a photo or two of the finished product.


As I said in the original post, in a long enough time line, I will rework the entire firewall forward on this plane, just not right now.