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Message: <blockquote data-quote="ttocs" data-source="post: 903249" data-attributes="member: 11896">after doing a couple of random searches, it seems that this site is one of the few that thinks a cowl hood would not help and could actually hurt cleaning.  While the windshield and cowl are a slightly higher pressure area, they are still far less then the air being forced into the grill right?  I am not sure how the air would be forced into the cowl with enough pressure to push air off of the radiator up front.  Do me a favor when you get a chance and we can put this puppy to rest.  Tape a small piece of paper to the cowl and take a short drive and see if it gets pulled into the cowl. or if it just blows right past it.  My bet is that the windshield is a high point of pressure but I am willing to bet that the cowl creates a small low pressure area that would help to suck hot air out and then over the top of the car.Again not trying to be difficult but trying to learn/understand.  LIke I said after a quick search I didn't find similar info elsewhere but then again the net is not always right and why I want someone with a cowl hood to try the paper trick to see what happens.</blockquote>