>After removing all the "stuff" out of my bus so I can begin restoration >I've noticed how noisy it is. The engine sounds VERY LOUD. The only >thing I have in the back is the folding bench seat and rear cushion. I >removed the side cabinet(floor to ceiling) as I want this to be a passenger >vehicle. The floor is rubber mat. My headliner is good. All the side >panels are intact. Are there any kits to soundproof the engine compartment? >What has worked for you? The JCWhitney insulation, 1" thick, made of two layers of acoustic foam with a layer of vinyl in between, seems pretty good inside the engine compartment. But it's coming off-- I didn't wait the 48 hours required by the Home Depot-purchased contact cement I used to install it, before exposing it to high heat (by driving it). Soon I will put in screws and aluminum or wood slats inside to hold it on. That foam is expensive, tho... around $45 for a 54" x 34" panel. I used two. This made it quieter, but not quiet. I have heard, that a lot of noise comes from metal body and engine- compartment panels resonating with the vibrating/roaring engine, in patterns that they have grown used to over the years. If this is so (anybody care to guess, as I have?), then it might be damped by spraying the inside of the panels with something like heavy foam or underbody rustproofing spray. I haven't tried this, but sounds good to me. Carpeting on the floor, and maybe the walls, helps, too. -Steve Maher smaher@gi.com '71 VW Transporter.
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