[C320-list] Engine compartment sound proofing

Mon Jun 23 11:11:57 PDT 2014

Once you've finished the installation, you may want to add handles to the
both engine covers to make them easier to remove.

Mark

#612 | Speakeasy | Chicago

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On Mon, Jun 23, 2014 at 12:46 PM, Jeff Hare <Catalina at thehares.com> wrote:

> You really have to do both covers.
>
> Of course choose whatever material you like and report back.
>
> I've seen 3 different installations aside from my own.  One used a 1"
> product from Soundown, one used the West Marine brand (like I did) and one
> used "silent running" paint on product.   The WM and the Soundown products
> looked nearly identical and are all surprisingly heavy and dense.
>
> One installation was really tight and nicely done with no gaps.  The other
> wasn't fit it all that well and left some gaps.  With the well-sealed
> installation I didn't recall hearing any of the diesel knock/pinging, but
> the one with the gaps sounded like it still could use some work to make it
> quieter. The painted on stuff was a joke. No difference to my ear but the
> owner swore it made a difference.   :)
>
> 1) Seriously don't use ceiling tiles. They're not suitable for an engine
> compartment.  They'll be kicking off particles that the intake will suck
> in.
>
> 2) Try not to use duct tape (or any tape not rated for this application) in
> the engine compartment.  The glues usually won't hold up long term and will
> come off and you'll end up having to "maintain" it, while hoping a piece
> doesn't also get sucked into your intake.
>
> 3) Make sure that whatever product you use will stay stuck.  The West
> Marine
> product still cannot be peeled loose after 11 years.
>
> 4) Whether you use Tiles or Rolls, make sure you have *no gaps anywhere*,
> otherwise it will not be as quiet as it could be.  This includes where the
> cover meets the walls.
>
> The decision to use the rolls vs tiles came down to ease of installation
> given that both are about identical in the sound department.  With the even
> widths and curved surfaces on the engine covers, the rolled material just
> went on easy in one continuous piece and just a trim here and there on the
> edges to fit with no seams to deal with, no jigsaw puzzle.
>
> Perhaps others who have done the tile installations could post some
> pictures
> on the C320 site (or send them to myself or David Prudden) to post so that
> people interested in doing this project can have pictures to refer to.
>
> Again, our installation pics are here on the Catalina 320 website:
> Aft cover:  http://tinyurl.com/EngineInsulation1
> Front cover: http://tinyurl.com/EngineInsulation2
>
> Good luck!
> -Jeff Hare
>
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
> Of Kaare Wold
> Sent: Sunday, June 22, 2014 11:22 AM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Engine compartment sound proofing
>
> I am interested in proceeding with this project to quiet down the rattlecan
> Yanmar.  I do have some concerns with using a plain Home Depot ceiling tile
> that is not  designed to function in an enclosed engine environment.  Would
> appreciate some feedback on the following question.
> Have you owners insulated just the front engine cover or did you insulate
> both the front and rear?  Thanks for your comments.
> Kaare Wold
> Sheet Music #945
> ----- Original Message -----
> From: "Jeffrey Brown" <oceanblues at mac.com>
> To: <C320-List at Catalina320.com>
> Sent: Thursday, June 19, 2014 6:54 PM
> Subject: Re: [C320-list] Engine compartment sound proofing
>
>
> > Someone on this forum suggest ceiling tiles, which I did and it worked
> > great and cheap.
> >
> > Jeff Brown
> > 949-350-5123
> >
> >> On Jun 19, 2014, at 4:14 PM, Jeff Hare <Catalina at thehares.com> wrote:
> >>
> >> Hi Bill,
> >>
> >> Around 2003 I installed sound proofing in our engine compartment and
> >> it made a big difference.  Mostly it cuts down the harshness and does
> >> drop the volume significantly.  But it won't be "quiet".
> >>
> >> I used the 1" West Marine which is a moderately dense foam with a
> >> lead-like layer in the middle to help hit multiple frequencies.
> >>
> >> I was able to do it in an hour or so.  Even today the adhesive is
> >> showing no signs of letting go.  You peel the backing off and give it
> >> a certain amount of time before you stick it on, but recall it was
> >> quite easy to dry fit and cut with a razor knife.  I purchased the
> >> "kit" which came with some silver seam tape and some metal plates
> >> with pin supports that they say to use for overhead spans, but
> >> they're  not strictly necessary on our engine covers because there is
> >> so little area to support.  I think I used one on the front cover and
> >> none on the aft cover.  Both are fine today.
> >>
> >> Incidentally, if you use 1" on the Front (galley side) engine cover,
> >> the lower pulley may just touch the insulation.  The trick here is to
> >> go ahead and install the cover and run the engine.  It's just the
> >> very bottom of that pulley that might rub just a tiny bit.  When you
> >> stop the engine you'll see if and where it rubs and can either leave
> >> it or carve out a tiny bit.  It really won't hurt anything.  You
> >> won't be able to use anything thicker than 1" on the front.
> >>
> >> Also, if you purchase a roll of the 1/2" version, you can use it to
> >> stick on the fridge side to keep the engine from melting your Ice
> >> Cream.  :)
> >>
> >> If I were to do it again, I'd still go this route.  I considered the
> >> Tiles, but it was a lot more piecing together and more seams.  With
> >> the rolls of stuff, you can cut and install the overhead piece first,
> >> then butt the sides up tight to it and it helps hold the edges in
> >> place.  I cut mine so that each cover just used one single piece
> >> (including the top), so that's an
> >> option too.   The first thing you'll notice is how much heavier the
> >> covers
> >> got.  The second thing is that the harshness is down considerably.
> >>
> >> Avoid the sound deadening paint scam.  It's a joke and doesn't work.
> >>
> >> Two pictures of the Job using the West Marine kit.
> >>
> >> http://tinyurl.com/EngineInsulation1
> >> http://tinyurl.com/EngineInsulation2
> >>
> >> Good luck!
> >>
> >> -Jeff Hare
> >>
> >>
> >> -----Original Message-----
> >> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On
> >> Behalf Of Bill Hutt
> >> Sent: Thursday, June 19, 2014 5:53 PM
> >> To: C320-List at Catalina320.com
> >> Subject: [C320-list] Engine compartment sound proofing
> >>
> >> Ok, new thread.
> >> I'm looking at a product from Sailorssolutions.com called SPM. It's 1"
> >> thick
> >> self adhesive tiles. Has anyone tried this with good results?
> >>
> >> Bill Hutt
> >>
> >>
> >> Sent from my iPad=
> >>
>
>