Honestly it has to be COLD for that theory to work andy. Remember the air entering the engine already passes over the engine if it's a 4g64 by the intake tube and that will warm up the air by warming the tube enough for freezing moisture to not be a problem. That engine bay is warm even if it's below 0 outside and the engine is running and warmed up. The intake will pick up below 0 air but it'll be warmed up to a usable temp once it gets into the engine compartment. My 95 sentra and my 06 sentra responded well to removing the t-body coolant lines.