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Grill blocks available at Lowe's, all models
OK, so there is some work involved. I went all out to block the bumper vents in my 2002 cavalier, wish I had some before pictures. First I drilled holes in the bumper plastic vertically to use roofing nails to "pin" the foam in place just incase it did not stick to the bumper plastic. Then masked off the back side with tape and filled in the front side with Great-Stuff foam in a can, red can not blue, the red can foam hardens solid whereas the blue stays softer for expansion around windows and doors. Once dry I smoothed out the front face with a rasp and was good to go. Unfortunately driving at 75 mph with a foam grill the gas pockets in the foam cells broke down and indented, stayed in place but made a lot of indents everywhere the foam was installed. So another filing of foam, rasped smooth then covered with 2 layers of woven fiberglass repair cloth and some metalic blue Rustoleum and we were good to go.
2 cans great-stuff $10.00
roofing nails $0.50
fiberglass repair kit $15.00
spray paint $4.00
Under 30 bucks is a small price to pay to get lots of strange looks. And I don't really worry about overheating for now. last week out daytime high was seven below zero, (farenheight for those wondering) welcome to Wisconsin. I will see about temps as the year goes on
You can see my car in the garage (Enola Gay 2.0) for pics of the bumper
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