Maybe I'm really confused, I would think that if you are not going to have any air from the engine cooling fan going through the heat exchanger, it would be better to screen them than totally cap them. So I agree with GeorgeK. Caping one end off would eliminate any air flow through them at all, but dont see the harm in leaving on the heat exchangers. I think the heat would still dissipate with minimal airflow through the exchangeers, so think of the heat exchangers as heat insulators carrying out the heat from under the car. Am I way off here? I'm not a physics wiz, I just feel like I did the last time I slept in a Holiday Inn Express!
