Soundproofing a Diesel

[66gmcguy]

Originally Posted by 79vette

Did you just have the factory fiberglass insulation? Or did you do any other fancy sound deadening in addition to that (dynamat, etc)?

Yes, just the factory fiberglass insulation on the inside of the cab on the firewall, plus the factory insulation on the engine bay side of the firewall, like the one in the picture a few posts up. Except mine was missing several chunks. I don’t think anybody reproduces that piece that goes in the engine bay unfortunately though.