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08-15-2019, 11:03 PM
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#1
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Junior Member
Join Date: Sep 2014
Posts: 25
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Quieting the Cummins genset
Just bought a 2020 Winnebago 24D view with a Cummins 3k diesel genset. The gen is "tinny" sounding and quite noisy overall. Anyone "quieted" their generator?
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2018 Tiffin Allegro Bus 37AP (sold)
2020 Winnebago View 24D (sold)
2017 Tiffin Allegro Breeze 31BR
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08-16-2019, 11:59 AM
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#2
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Senior Member
Winnebago Owners Club Freightliner Owners Club
Join Date: Mar 2008
Location: Southern Ontario
Posts: 1,381
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Keep in mind that the generator needs air to run and keep cool. Any effort to reduce the noise would have to focus on insulation on the coach surfaces near the generator and not disrupt its air supply. I am confident that you will get used to it and if it is running the AC, might just notice it is noisy as well. Congrats on the new coach!
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Bob
09 Journey 39Z
Southern Ontario
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08-16-2019, 12:41 PM
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#3
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Senior Member
Tiffin Owners Club Winnebago Owners Club
Join Date: Feb 2012
Location: Las Cruces, NM
Posts: 4,040
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First generator? Your generator meets all USFS specs for quietness. You can get a Genturi to deflect the exhaust and some of the noise. Other than that, learn to live with it - you will barely hear it after you turn on the A/C.
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Roger & Mary
2017 Winnebago Navion 24V (Sold)
2014 Tiffin Phaeton 36GH (Sold)
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08-16-2019, 09:59 PM
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#4
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Junior Member
Join Date: Sep 2014
Posts: 25
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My previous 2 coaches were diesel pushers with 10k Cummins diesel gensets. These generators were substantially quieter. Yes, the air units were quieter too. The smaller genset is very common in many makes and models. I was hoping that there was some remedial action that others had done.
Would a genturi have any affect? I had one on several previous coaches and they were useful for deflecting exhaust but not quieting things down.
Would a muffler change of some sort help?
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2018 Tiffin Allegro Bus 37AP (sold)
2020 Winnebago View 24D (sold)
2017 Tiffin Allegro Breeze 31BR
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08-17-2019, 08:34 AM
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#5
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Senior Member
Join Date: May 2017
Location: Apple Valley, MN
Posts: 306
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If put your hear down by the exhaust you hear relatively minimial noise. Majority of the noise is radiating from the unit itself.
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08-18-2019, 10:34 AM
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#6
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Junior Member
Join Date: Sep 2014
Posts: 25
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There is some exhaust noise but the bulk of it is localized to the genset. I opened up the access hatch and it is very loud. Most annoying is a high-pitched rattle from the unit. Is this characteristic of this model?
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2018 Tiffin Allegro Bus 37AP (sold)
2020 Winnebago View 24D (sold)
2017 Tiffin Allegro Breeze 31BR
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08-18-2019, 10:44 AM
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#7
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Senior Member
Monaco Owners Club Fleetwood Owners Club
Join Date: Sep 2016
Location: Manitoba, Canada
Posts: 972
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Loose bolts perhaps? A tinny sound may indicate things vibrating against each other that shouldn’t. Check for any obvious loose covers on genset.
Just my guess, Terry
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2002 Monaco Windsor 40PKD. Marjorie 2.
2015 Equinox V6 Roadmaster tow setup
2019 ALP Adventurer 24DS for the short trips. April, 2021
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08-18-2019, 05:18 PM
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#8
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,951
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Quote:
Originally Posted by bobmac
Keep in mind that the generator needs air to run and keep cool. Any effort to reduce the noise would have to focus on insulation on the coach surfaces near the generator and not disrupt its air supply. I am confident that you will get used to it and if it is running the AC, might just notice it is noisy as well. Congrats on the new coach!
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It's time to invoke the warranty!!!
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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08-18-2019, 05:54 PM
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#9
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Senior Member
Join Date: Oct 2018
Location: Northern VA
Posts: 194
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Quote:
Originally Posted by luvlabs
you will barely hear it after you turn on the A/C.
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 So true 
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08-21-2019, 10:45 PM
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#10
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Senior Member
Join Date: Jun 2019
Posts: 129
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Check the exhaust hangers. Sometimes they are installed crooked and make that tinny metal on metal noise. Just had my 4K dropped to service a cover that was installed incorrectly at the factory. The tech twisted the u bolts on the hanger during reinstall. It now has a nasty rattle noise. The rubber in the hanger should absorb vibration. If it is crooked metal on metal noises can happen.
Surprisingly, all techs are not talented enough to spot little things like that. Some people prefer to buy used because those of us that care, fix a lot of manufacturing defects.
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2019 Itasca Sunstar 31BE
Sway bars, Rear track bar, 340w Solar with Blue Sky controller.
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