Made up a Grill block for my new Civic:
It's hard to see, but it completely covers the lower grill opening leaving only a few gaps around the emblem for an air inlet.
I've been monitoring temps with my Ultragauge, and it went from a rather constant 188°F to fluctuating from 199°F to 207°F. I've been contemplating cutting a hole in it, but since I haven't heard the fans kick in and it's still in the warm summer months, I'm leaning toward leaving it.
Any thoughts?