Sciolistes.
Thanks, I agree, I think that what we have here is a misunderstanding of the advice to avoid attempting a go-around with heat selected and I suspect that the POH checklist says select cold on approach following the same ( probably legally generated) reasoning.
The location of the intake is largely academic since the aim of every good induction system is to deliver large quantities of cool ( hence dense ) air to the engine and as evidenced by Piper's decision to fit a hot air selection on the aircraft in the first place. In fact one could argue that the location of the intake, quote " in a warmer part of the cowling" would constantly expose one to the danger of heating air into the icing range and could lead to detonation in very hot conditions. Perhaps Piper should have fitted a carb cooling lever ?
Most of the well meant advice recieved on this subject would appear to be apocryphal and in the absence of any official / documented evidence to the contrary I think I shall continue to be a tad suspicious of this item in the checklist , Never assume, Check ! it's kept me alive for a long time so far.
Pause for thought: Would those who follow the approach checklist to the letter advise their students not to select carb heat when closing the throttle
at 2000 - 3000 ft for a PFL ?