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U270 Muffler

We have been trying to find someone to replace/repair the muffler on our 2001 U270. The muffler is barrel shaped.  Its rear end morphs into a truncated pyramid shape (with rounded edges and which itself curves toward the tailpipe). This further morphs into the tailpipe. Both the rear of the 'pyramid shaped' part and the tailpipe are badly rotted.
 
I haven't had any luck with the usual Nac people and am looking for alternatives.  All suggestions are welcome.

Thanks, Robert
Rob & Di
2001 U270 34'

Re: U270 Muffler

Reply #1 –
Search "resonator" and "muffler replacement" on this Forum.  You will read more than you ever thought possible about this hotly discussed and controversial subject.  Everybody's got a opinion.  8)  See my personal solution in the thread linked below, Reply #226 and #237:

Resonator and muffler replacement
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: U270 Muffler

Reply #2 –
Rob and Di,

Use search function on forum and search for 'resonator' Cheaper, lighter, more power.  I am told even the factory goes that way now rather then replace original muffler
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)

Re: U270 Muffler

Reply #3 –
When my was corroded I put in a resonator as well. The 8.3 will not get as much of a benefit but the resonator allowed me to run cooler and saved my batteries and I got better milage as well.
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: U270 Muffler

Reply #4 –
When you read those threads keep in mind the context as many of us made the change before replacement was required.  It was an option not a requirement.
George and Steph
1997 U270 36 Build 5081 "Honu"
1180w Solar 400A lithium all Victron house system
Motorcade 17670, SKP 128300, FMCA F459019
73 VW Camper, 79 VW Camper, 2363 Sunline, and an Arctic Fox 25P

Re: U270 Muffler

Reply #5 –
Robert,

Here is our improved performance story after we changed to an Aero resonator.  Our old muffler was not rusted on the outside, but it made sense to get rid of the big muffler and open up the exhaust flow.

Exhaust System Replacement - 1997 U270

There are many more write-ups on Foreforums, search on the word resonator to find them

Once you decide if you want to change to an Aero, other resonator or another big muffler, you may do better to buy the part and have a truck muffler shop do the install.  Explore local heavy duty muffler shops and go from there.  Motorhomes have many common parts to big trucks, and some truck shops will work on motorhomes.

Re: U270 Muffler

Reply #6 –
I paid dearly for my local Cummins shop to mount our 5050xl. Eight hours shop time plus parts. 

Beautiful curved pro parts.  Beautifully welded. Commercial job.  Reused my previous wrap around the resonator.

Would pay again for a pro level commercial job

You pay for what you get. If your lucky...

Noisier.  More top end runout power.  Better pull at low rpms. 

That and the change of tires and fan drive thermostat resulted in 1 mpg increase at ten miles per hour faster towing.

Three mpg more at 60.  Can't stand going that slow.  So just a test.
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: U270 Muffler

Reply #7 –
I had mine replaced with resonator at Bernd's while getting other work done.

Beau Reece was the guy who installed it while he was working at Bernd's and did a good job.

Try either of them if you haven't already. 

Did you try MOT or Old Town?
Ted & Karen
2001 U270 36' - sold after 12 years full timing

Re: U270 Muffler

Reply #8 –
I googled both Barnd's and Old Town in Nac but couldn't find either. The reason I ask is that we are planning to get some other work done at MOT in the next few months. I have a feeling that MOT doesn't want to do this job but it would be convenient if I could get it don in Nac while I'm there. I can't really do it myself due to my age and broken/unrepairable right shoulder joint.
Rob & Di
2001 U270 34'

Re: U270 Muffler

Reply #9 –
Old Town Motorcoach

JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: U270 Muffler

Reply #10 –
Bernd's is AKA
WorldLine Motors, LLC
1719 E. Main St.
Nacogdoches, TX 75961

Good Luck, Dave A
Dave and Nancy Abel
'00 U320 36' WTFE  Build #5669
'10 Jeep Wrangler Unlimited Rubicon
Livingston, TX  SKP's Fulltiming

Re: U270 Muffler

Reply #11 –
Thank, I'll call both of them next week when their open.
Rob & Di
2001 U270 34'

Re: U270 Muffler

Reply #12 –
I replaced mine with a friend last weekend. The job, removing old muffler and replacing it with AT5050XL resonator, 3.5 hours.We fabricated the hanger and welded a piece of angle,  (5 feet long) In the direction, front to back of the coach just above the new resonator so the hangers are on a direct vertical support.  I will post pics next week. Very easy job, no removal of side panels or anything else. Imho, I think its a good job for most people with a little skill, welding etc.... The cost is about 250.00 in total.
'The strength of the effort is the measure of the result'
1995 U320SE
40'
#4740
#17648

Re: U270 Muffler

Reply #13 –
"Remember" Disconnect batteries before welding on coach!
'The strength of the effort is the measure of the result'
1995 U320SE
40'
#4740
#17648

Re: U270 Muffler

Reply #14 –
Did mine by myself without any welding involved. Took my time so was most of one day to install.
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: U270 Muffler

Reply #15 –
Quote from: Rob & Di –
I googled both Barnd's and Old Town in Nac but couldn't find either. The reason I ask is that we are planning to get some other work done at MOT in the next few months. I have a feeling that MOT doesn't want to do this job but it would be convenient if I could get it don in Nac while I'm there. I can't really do it myself due to my age and broken/unrepairable right shoulder joint.
Did mine myself with no welding lying on my back in the rock drive...I FULLY understand why you would prefer not to. The original muffler is like dropping a small Volkswagen from under your coach.  Ok, maybe not quite, but it is heavy and cumbersome and doing it by yourself when on a timeline is stressful.  The resonator option is much louder.  Not for everyone but I wouldn't have it any other way.  I slide my window open when accelerating just to hear the echo.  I suppose I never matured past age 16...my wife may agree.
Mike and Mari
'98  36 270 WTFE
Build #5272
Club #17504

Re: U270 Muffler

Reply #16 –
On my u-320 450 HP the difference at ear level 7 meters from coach was 2 dB at idle and 4 dB at 2000 Rpm according to .99 app for sound pressure meter on my iPhone MUCH different tone or sound though
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)

Re: U270 Muffler

Reply #17 –
Quote from: rbark –
Did mine by myself without any welding involved. Took my time so was most of one day to install.
Same here but did take the end panel off, then made a cabinet to go into vacant opening in panel to left.
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: U270 Muffler

Reply #18 –
John, my panel is hinged so was no problem. I also made a removable wire basket to hold all my sewer hoses and fittings thus keeping them away from the fresh water compartment.😀
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel