Does the underhood insulation blanket serve any purpose other than noise dampening? The chipmunks have once again stuffed mine full of acorns--and it's only the first week of September! My first year with the truck(2000) they pulled out clumps of it and made nests ontop of the exhaust manifold. I'm thinking of yanking it out completely and hoping the little buggers don't go for wire insulation instead.