The International Cessna^® 170 Association

I just came across a diagram that I used years ago to fabricate a plate to seal off the lower nose cowl vent. This supplements the nose grill winter cover plates.

The file can be found here:

https://www.dropbox.com/s/rxvi806847rnc ... t.pdf?dl=0

It looks like you are waking some wing tips on that dirt strip

Duct tape.