The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Are all these early trucks noisy going down the road?

AcampoDave · 12-03-2020, 02:38 AM

Yeah, but dont overlook the benefits of using the butyl based deadener strips on the large flat parts first. Especially the outer door skins and the tranny hump. (I didn't put closed cell foam in the doors though because water gets in there, but the butyl sure did make them a whole lot less tinny.) I saw a deal on the web where a guy uses a cymbal. He didn't need to cover the whole thing with butyl to stop it from resonating...just 30 to 70 percent coverage kept it from droning on. Butyl stops the resonance and closed cell foam absorbs the noise and insulates too.

12-03-2020, 02:38 AM	#11
AcampoDave Registered User Join Date: Feb 2013 Location: central California Posts: 2,731	Re: Are all these early trucks noisy going down the road? Yeah, but dont overlook the benefits of using the butyl based deadener strips on the large flat parts first. Especially the outer door skins and the tranny hump. (I didn't put closed cell foam in the doors though because water gets in there, but the butyl sure did make them a whole lot less tinny.) I saw a deal on the web where a guy uses a cymbal. He didn't need to cover the whole thing with butyl to stop it from resonating...just 30 to 70 percent coverage kept it from droning on. Butyl stops the resonance and closed cell foam absorbs the noise and insulates too.