Engine Compartment Lining

[ancona21]

Hi All,

I am a new owner of a 1985 Cherubini-designed Raider 33. The engine compartment lining (acoustical? fire protection?) was in bad shape. It was faced with a silvery colored foil-like material. As soon as i tugged on it the material behind it which looked like foam began to disintegrate into a blackish dark-gray powder. What a mess! Eventually I removed all of it and cleaned up the compartment.

I'm seeking recommendtions for replacement lining and any suggestions at all for installation procedures.

Thanks,
Ancona

 

[Ted]

I am planning to re-insulate my engine compartment also. I just receive information about a product that I may consider for my application. It may be appropriate for your boat too.

Check out this product made by Glacier Bay, Inc. It's called Ultra dB acoustic insulation and is made in California. It will be available the first week in June.

Here is the information that Glacier Bay sent me last night.

Pricing is $350 per 4.5' x 6' sheet,(27 square feet), which
is a little under $13 per square ft.

Any orders for 5 or more sheets placed before the end of May will be
granted a 20% discount from the MSRP, for a total of $280 per sheet.

Orders for 2 to 4 sheets before May 31st will be granted a 5% discount,
or $333.00 per sheet.

Contact information:

N. Bruce Nelson

Glacier Bay, Inc.
2930 Faber St.
Union City, California 94587
(direct) 1 510 431 5821
www.glacierbaytechnology.com

No affiliation whatsoever.

 

[Ed Schenck]

I wonder what causes the foam to disintegrate. My 79 Cherubini insulation is still in good shape. It needs reglued in a couple of places but that is from moving bulkheads and mounting equipment. If I were doing mine it would be the same material because it really does soundproof. And it has lasted over thirty years.
http://www.cyber-bridge-marine.com/...sulation-Barrier-1-In-54-In-X-96-In-1-Lb.html

 

[Slim pickins]

You might look at Dynamat. They use it for cars. I don't know of the fire protection, but the dynamat extreme says repels heat(says nothing of flame), and low freq hums from big engines(we have low freq from little diesels). I've used it with good results in a runabout I had with an inboard, lined the inside of the "hump" with it and the engine went silent.

 

[DougM]

For you folks on the east coast, look in the Defender catalog (defender.com). They sell sound insulation for engine compartments in various sizes and thicknesses.

 

[wufibugs]

This is probably one of those instances where "marine" means "surcharge". I would look at J.C. Whitney or a performance outlet like Jegs. The stuff that was installed in my engine compartment looks identical to the foil faced material I used on the firewall when I converted my XJ6 to Chevy power.

 

[rardiH36]

Here's a url to a site that sells automotive deadener.

http://sounddeadener.com/products/bulk packs/50.htm

Several years ago I ordered quite a bit to line most of the interior of my new Scion Xb. Much much quieter.

Although my boat's engine box is factory lined with the foil covered foam that Ed Schenck posted a picture of (and mine also is going strong after 30 years!), I added some of the automotive deadener to the underside of the cockpit sole (the ceiling of the sound box). As it did with my car, the stuff made a really noticeable improvement in engine noise while in the cockpit. One aspect about this product, vs. the foam variation, is that it provides dampening mass to panels which stops them from resonating like a drum. I am planning to add some more deadener around the inside of my lazarette areas which I know are resonating from the engine noise and vibration. Also, I'll install some to the outside of the engine compartment box to further dampen the noise/resonance.

The website says heat resistance is to 300F. The aluminun foil coating is quite thick. I can't comment on if it meets marine fire retardent standards. I would think however that the black foam marine product would be flamable at high temperatures as well.

 

[TDudley]

I just installed this product in my engine compartment. It went in nice and it seems pretty durable. I also had the black foam problem you had with the old stuff disintegrating all over the place.

http://www.sailorssolutions.com/index.asp?page=ProductDetails&Item=SPM01

The Admiral installed our and it was pretty easy to cut and stick. It pretty thick stuff though so I know we will have to augment it with some of the flexible, less durable product on the back side of the stairs and in areas where the engine is close to the side walls.

 

[sailaway78]

Check out foam on ebay

There is some 1" sound/heat insulating foam on ebay, listed as for marine use, that is about 1/4 the price of what you are looking at.