I just received a product called quilted fiberglass that I am going to make a hood pad out of and a barrier around the engine to lower noise into the driver's compartment. Quilted fiberglass is made to be a sound absorber and is made with a nylon skin with accoustic fiberglass attached. Quilted fibergalss is rated for its noise reduction capability and temperature rated with the same classification of several well-known hood pads made by high-end car stereo installers for noise reduction.

I will be doing the first part of the install this weekend - the hood pad - using 3M adhesive and then universal hood pad attachment washers that are 2" in diamemter (I want this to be a permanent fix and not have to worry about the hood pad again - and get away from the foam pad). Then I am going to make the engine sound barrier - you've probably read about this product on this forum or seen on eBay the diesel sound shield. I am using the same or similar material this product is made from, but mine will be longer and enclose more of the engine compartment so it should be better at noise reduction.

I was going to post this info after I did the job, but since Steve019 posted his repair I thought I would share what I am going to do. It sounds like what Steve is doing will work fine, although I am curious about how well the stiff duct board bends to conform to the contours of the hood (the outline of the hood should not be a problem).

My $0.02 Worth!
Tom

__________________
America: Land of the Free!

1977 300D: 300,000+ miles

American Honda: Factory Trained Technician & Honor Grad.
Formerly:
Shop Foreman;
Technical Advisor to Am. Honda;
Supervisor of Maintenance largest tree care co. in US for offices in Tex.