Bones13
Old Akro has covered it !!
Good to see some helpful responses as apposed to some of the smart a$$ comments you get on here.
I flew 182s and 206s years ago meat bombing and we always left the cowl flaps open for climb, then closed for jump run and descent. Once on the ground, retract the wing flaps and open cowl flaps.
Never had to replace a cylinder so it seemed to work well.
If you're flying a 206 with a pod they modify the cowl flap range as part of the fitment.
Cheers