Join Date: Sep 2005
Location: New Westminster, BC
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Marine outlets sell a foil backed foam sheet about 1" thick that can be glued to the engine box walls with contact cement. It comes in sheets about 36"x60" IIRC, depending on sales, at between $60-$90 per. Leaving the foil exposed makes for a clean bright engine space.
We used to have our air compressors surrounded by lead-lined rubber curtains.. haven't seen these commercially but they worked great The material is quite heavy, about 1/8" thick and probably as effective as the 1" foam. It's also very good to use as curtains to block off some areas that do not have a solid surface available.
Another trick we used in a previous boat was to drape an old dentist's Xray blanket over the engine. This was extremely effective noise control, and made no difference to the operation of the diesel other than you have to make sure the blanket doesn't/can't block the air intake. We had to remove it for routine service, but that was a minor inconvenience.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)