Exhaust cracks can be insidious, although sometimes they leave a gray-looking residue. Use a bright flashlight and inspect them every time the cowling is off.
In Case You Missed It
Searching for the Right RV-6
Louise Hose - 1
If at first you don't succeed, keep looking-sooner or later you'll find it!
Dimpling for Beauty and Speed
Each time you install a fastener on your airplane kit, consider whether the head...