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Old 06-05-2021, 04:08 PM   #1
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2019 fr3 30ds Noise

I have seen over time many threads and replies regarding noise reduction in the FR3. I just downsized from DP's due to age (80) and kids have left the nest with the grandkids. The noise is horrific and I suspect it is coming from the doghouse as well as other places. I want to work on the dog house first. Can someone be specific and tell me exactly what Dynamat you used. They sell so many different kinds, this ole Marine Grunt is confused. Yeah I know we Marines are easily confused. LOL. Please be specific. Thank you gang, and Semper Fi, Jim
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Old 06-05-2021, 08:14 PM   #2
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Quote:
Originally Posted by JimBath View Post
I have seen over time many threads and replies regarding noise reduction in the FR3. I just downsized from DP's due to age (80) and kids have left the nest with the grandkids. The noise is horrific and I suspect it is coming from the doghouse as well as other places. I want to work on the dog house first. Can someone be specific and tell me exactly what Dynamat you used. They sell so many different kinds, this ole Marine Grunt is confused. Yeah I know we Marines are easily confused. LOL. Please be specific. Thank you gang, and Semper Fi, Jim
Very interested in this too!
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Old 06-07-2021, 10:44 AM   #3
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Same here. I would assume DynaPad based on this specsheet.
https://www.dynamat.com/wp-content/u...-Sheet-Web.pdf
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Old 06-07-2021, 11:35 AM   #4
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I would suspect the same, but would really like to hear from someone who has actually applied it.
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Old 06-07-2021, 12:48 PM   #5
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Agreed, looking into this some more I see some folks have used a combination of products as dynamat and dynapad / dynamat and dynaliner or hoodliner

I may order some of this from Amazon and try out a few things that I think would work. Im thinking for the doghouse -- possibly dynamat and/or hoodliner (inside) and dynapad (outside)

There are good comments from others for all the products on Amazon. I also want to insulation soundproof the generator area and the floor above that. Im thinking dynamat and hoodliner / or dynaliner for that The stuff is expensive!
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Old 06-07-2021, 03:50 PM   #6
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jBender, what type rig do you have that you could put something on top of the dog house (if I read you correctly)? And yes, that stuff is expensive, but if it allows me to talk to my wife without shouting it will be worth it. LOL
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Old 06-07-2021, 05:18 PM   #7
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I just added Thermo Tec Suppressor Sound heat/sound material to my 2019 33DS doghouse, last week. Turns out that FR did put some cheap foam that does nothing. So I added a layer of Thermo Tec Suppressor Sound right over the foam that FR installed. Used some 3M adhesive to the back of my mat, rolled it in and put the doghouse back.
Now there is very little noise at normal gears. It still is noisy (not as much) when you are in a lower gear climbing or driving down a steep grade but well worth add in a new layer. no more screaming at the passenger.
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Old 06-07-2021, 06:24 PM   #8
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FR3 30DS. They sell the dynapad in 32 x 54 sheets. That size would cover the outside of the engine cover/doghouse and then some. It is thick so it could lay over the top and conform somewhat and be attached with some nano tape. I would also make a custom storage box/ console cover that can be removed.
Just kinda of thinking outside the box but that is the plan so far I let you know how it turns out.
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Old 06-08-2021, 12:07 AM   #9
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I also noticed noise coming from the front grill. The noise is the front fiberglass halves rubbing against each other. The evidence is the white fiberglass dust where they touch each other.

I stuck foam weather striping between the two front grills. The FR3 was quieter when I had drove it. I also wonder if bug screen was making a noise, so I used black silicone caulking on my front grill.


see: I ended up using black silicon caulking in the grill

Then I added a short hose on each of the locking bars and placed four 3" pieces of TRIM-LOK to keep the fiberglass grill from rubbing.


I will have to take pics.
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Old 06-08-2021, 09:42 AM   #10
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We had the same noise issues in our 2020 30-DS. When we returned from our 5,00 mile winter trip I started researching this site and others for a solution to the noise.
- We purchased the Dynamat 10455 (9 sheets - 18"x32"x.067" thick) for $160 on Amazon. It's self sticking and very easy to install. We purchased two 32"x48" cheap flexible rubber back rugs from a local discount supplier (about $10 each). We also purchased a roll of 36" wide brown kraft paper from Hobby Lobby.
- We installed the Dynamat product to the underside of the engine cover. We installed the Dynamat product directly over the current insulation (be sure to wipe the current insulation with a damp rag before applying the Dynamat product).
- Next, we trimmed the kraft paper to to the shape of the floor area in front of both the driver and passenger seats to use as a template for the rugs. Next we trimmed the rugs to the templates and installed the Dynamat product to the underside of the rugs. The Dynamat stiffened the rugs and we installed them on the floor on both the driver and passenger side. The mats are not fastened and easy to remove for cleaning.
- We estimate that adding the Dynamat reduced the noise level by 50%. That's not a scientific estimate just the wife and I being able to talk to each other without raising our voices to communicate while driving. It's not a total fix but we found it does make the noise level more acceptable.
See the attached .pdf for pictures.
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File Type: pdf Dynamat.pdf (339.0 KB, 61 views)
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Old 06-08-2021, 12:36 PM   #11
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Thanks Rick

Loved your ideas, believe that is how I will go. Do they make a thicker Dynamat than 0.67"?How thick was your Dynamat?
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Old 06-08-2021, 01:02 PM   #12
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Quote:
Originally Posted by JimBath View Post
Loved your ideas, believe that is how I will go. Do they make a thicker Dynamat than 0.67"?How thick was your Dynamat?
Check it out on Amazon, I see it goes up to 3/4 thick. I would not recommend thicker than the .067 that I used on the engine cover. The contour of the underside of the engine cover might be difficult to form the thicker Dynamat into the corners. Even with the .067 thick I had to cut much of the Dynamat into strips to fit the contours.

The floor mats are flat and might easily accept the heavier Dynamat. The kit I referenced in my OP was enough to do the engine cover and two mats with some scraps left over.
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Old 06-08-2021, 01:12 PM   #13
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Ooh-Rah

Thanks Rick, you're Prince. Semper Fi, Jim
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Old 06-13-2021, 01:15 AM   #14
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Quote:
Originally Posted by rickemo View Post
We had the same noise issues in our 2020 30-DS. When we returned from our 5,00 mile winter trip I started researching this site and others for a solution to the noise.
- We purchased the Dynamat 10455 (9 sheets - 18"x32"x.067" thick) for $160 on Amazon. It's self sticking and very easy to install. We purchased two 32"x48" cheap flexible rubber back rugs from a local discount supplier (about $10 each). We also purchased a roll of 36" wide brown kraft paper from Hobby Lobby.
- We installed the Dynamat product to the underside of the engine cover. We installed the Dynamat product directly over the current insulation (be sure to wipe the current insulation with a damp rag before applying the Dynamat product).
- Next, we trimmed the kraft paper to to the shape of the floor area in front of both the driver and passenger seats to use as a template for the rugs. Next we trimmed the rugs to the templates and installed the Dynamat product to the underside of the rugs. The Dynamat stiffened the rugs and we installed them on the floor on both the driver and passenger side. The mats are not fastened and easy to remove for cleaning.
- We estimate that adding the Dynamat reduced the noise level by 50%. That's not a scientific estimate just the wife and I being able to talk to each other without raising our voices to communicate while driving. It's not a total fix but we found it does make the noise level more acceptable.
See the attached .pdf for pictures.
Are the floor mats you made just for around your feet? Not back under and around you seat right?
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Old 06-13-2021, 05:34 AM   #15
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Josh...the floor mats lay from the base of the seat pedestal to the firewall under the dash.
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Old 06-14-2021, 04:06 PM   #16
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I have tried a lot of things to quite down our FR3 as well as spent a lot of money on after market suspension products. The bottom lines is a gas coach will always be noisier and ride rougher than a diesel pusher. It seems I am always trying to fix a new noise.
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Old 06-14-2021, 05:23 PM   #17
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Quote:
Originally Posted by rk06382 View Post
I also noticed noise coming from the front grill. The noise is the front fiberglass halves rubbing against each other. The evidence is the white fiberglass dust where they touch each other.

I stuck foam weather striping between the two front grills. The FR3 was quieter when I had drove it. I also wonder if bug screen was making a noise, so I used black silicone caulking on my front grill.


see: I ended up using black silicon caulking in the grill

Then I added a short hose on each of the locking bars and placed four 3" pieces of TRIM-LOK to keep the fiberglass grill from rubbing.


I will have to take pics.
Pictures I promised;

Rubber behind right hinge.
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Hose on grill lock.
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Right side
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Top Center closed.
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Grill closed.
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Old 06-15-2021, 12:10 PM   #18
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Quote:
Originally Posted by rk06382 View Post
Pictures I promised;



Rubber behind right hinge.

Attachment 257027



Hose on grill lock.

Attachment 257028



Right side

Attachment 257029



Top Center closed.

Attachment 257030



Grill closed.

Attachment 257031


On my 2018 30ds I used the dyna mat on the dog house and I used this form board from Home Depot called silver board for heat and sound comes in 2x4 pc I glued and nailed it with roofing nails with the orange washer only went back to around the door both together worked great
I also wrapped the ac duct work with insulation wrap now the dashboard ac works much better
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Old 06-16-2021, 08:42 AM   #19
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In addition to what rk06382 did - I used similar weather stripping between the screen door and the door. This stops most of that rattle and squeak between them. There is a piece of aluminum at the bottom of the screen door, that rattles also, I used clear tape the bottom inside corner but there are probably better ways. The outside door squeaks as you drive, and the only solution I have found so far is to spray WD-40 on the rubber seal. I tried adjusting the striker plate to make it tighter, didn't help.
And of course - all those plates, pots and pans need to be stowed so that they don't make noise (or break). We did leave a pan in the oven once and didn't wrap it with a towel and my oh my that was a racket until our first stop.
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Old 06-16-2021, 03:58 PM   #20
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Hose on latches

Did the hose on the grill latches today, perfect no movement at all! Dynamat due in tomorrow and will start on the dog house, will show before and after pics once I finish.






PERFECT
Quote:
Originally Posted by rk06382 View Post
Pictures I promised;

Rubber behind right hinge.
Attachment 257027

Hose on grill lock.
Attachment 257028

Right side
Attachment 257029

Top Center closed.
Attachment 257030

Grill closed.
Attachment 257031
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