[C320-list] Engine Sound Proofing Insulation

[Jamie Pett]

I have been following this thread as I am interested in cutting engine
noise also.  Does the soundproofing installation contribute to engine
compartment heat ? Does the engine run noticibly hotter ? 

Jamie Pett
'Bella Luna' #614




-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of warren
updike
Sent: Thursday, November 06, 2008 11:02 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Engine Sound Proofing Insulation

Brian, I ordered the medium kit, SPM18, with 18 tiles. This was
sufficient
for both covers all surfaces. The adhesive is quite strong as I've had
no
problem with it these past three years. No mechanical fasteners were
necessary.

 

I cleaned all surfaces with Interlux 202 which is a fiberglass cleaner
not
so volatile as MEK or Acetone. It will soften the surface of the inside
of
the covers so work quickly and don't go back over so much.

 

I did not bend the tiles around the inside curves of the covers. I
butted
the edges so that there was a slight overlap of the aluminized cover and
the
foam backing was in contact. I arranged the tiles from these butt edges
and
cut where necessary joining the edges in the same way as on the curves.

 

Cuts were made with a utility knife and a straight edge. Using the
straight
edge, I would compress the tile and score with the knife then two or
three
more passes through the foam backing. The cuts were clean an accurate. I
tried using scissors but didn't find they answered the need.

 

I covered too some of the gel-coated surfaces on the port side. I had
about
5 tiles left over. Sailor Solutions will give a credit for unused tiles
less
a restock charge and, of course, plus the shipping. I ended up selling
to
another boater. I don't know why I didn't use the extra tiles to cover
the
under side of the particle board covers under the mattresses. I don't
remember if I even considered it. You should.

 

On my #62 with the Perkins engine there was no problem with spacing as I
had
no place where anything touched the tiles. You may find this an issue if
you
have the Yanmar engine as I understand others have had to cut out some
insulation around the engine pulley or water pump pulley.

 

The sound reduction is significant though not so much as in your car.
Much
of the "sound" is vibrations passing through the hull by way of engine
mounts and leaks around joints. By consulting a sound proofing
consultant, I
learned that anywhere air can pass in/out of the space is a place where
sound will escape too. To that end, I sealed all edges of the covers
with a
foam tape. I think that helped some too. Also, try to keep the aft cabin
door closed when motoring. That may help some too.

 

Good luck with your project. I ask that you come back to this list with
a
report on your project so others can benefit by your experience.

 

Warren & Pattie Updike

Catalina 320, #62, "Warr De Mar"

Middle River, Chesapeake Bay

 

 

 

 

-----Original Message-----
From: Amirault Family - S&B [mailto:amiraults at sympatico.ca] 
Sent: Wednesday, November 05, 2008 5:59 PM
To: c320-list at lists.catalina320.com
Subject: Re: [C320-list] Engine Sound Proofing Insulation

 

Mr Updike:

 

I contacted Sailor Solutions today at the link you supplied, and they

confirmed that they ship to Canada. I intend to order now for a spring

pre-launch install. Could you confirm for me how many tiles you used,

whether the number is for both front and rear engine covers, and
includes

the inside tops of each, and whether the adhesive is strong enough to
stick

to the cover tops or if it is necessary to screw these in place?

 

Having done the install, did you find the effort worthwhile and that the

noise reduction was satisfactory? What did you use to clean the cover

interiors and prepare them for the tiles? Were the tiles sufficiently

flexible to adhere around the curved corners of the covers? Once
installed,

do the covers still clear the engine external moving parts?

 

For this relief, much thanks.

 

Regards;

 

Brian Amirault

 

797 Waltzing Bear, too