Shortening the Oasis exhaust pipe

[Buly]

Just finished replacing the summer loop pump. Now I’m thinking about shortening the exhaust on the Oasis. Can’t believe they designed it with (I’m guessing) about 25’ long exhaust with many bends? That’s lots of back pressure. My neighbor did it on his DS. Will check his first.
Thinking of bring it somewhere infront of the rear tires? Wander if anyone else has done it?

 

[DavidL]

Where in the plan will the exhaust exit? And is there gaps that the exhaust can find it's way back into the RV at night? My guess is that is why they spent all that material to go to the back. Is it working? Then I wouldn't worry about back pressure if it is.

 

[Buly]

On my DS, the Oasis exhaust goes from the back all the way to the front, discharging infront of the front tire.

 

[Sealyn]

Why modify it? Is there an issue with its operation? Maybe a call to manufacturer will answer your questions.

 

[DavidL]

My guess is the pipe is to get the exhaust away from the bedroom.

 

[Buly]

I believe it will improve combustion. I’m getting too much carbon build up. Have to clean nozzle often and starting fails once in a while.
The little intake blower fan has to push the exhaust gasses all that distance. There is no convection draft like a vertical chimney, or the high power of the internal combustion engine. Who knows? It may work. I think on some newer models, they shortened the exhaust?

 

[JRS]

Mine came with the Oasis exhaust just in front of the drivers side dual wheels.

 

[DavidL]

Just be REALLY sure no fumes get into the coach. And have a Co2/ NoX sensor in the bedroom / front of coach.
Personally, I would leave well enough alone. Believe that they would not have spent the $300 in pipe if they didn't need to. There are specs for the number of bends and Ft in the installation manual. I am sure they are within the specs.

What I am surprised is not seeing a factory pipe up to the roof...I am sure it's due to issues with heat. But there are solutions for that problem too...

 

[Buly]

I was right. As Joe said, they moved the exhaust the way I’m planing to do it. Infront of the dually wheels.

 

[Neemer]

I was right. As Joe said, they moved the exhaust the way I’m planing to do it. Infront of the dually wheels.

Mine is in that general area as well.

 

[Chuggs]

I took pictures from a newer coach. The only thing that concerns me is how the heat being directed out near the wet bay would possibly heat up and ruin a water hose…or interfere with dump hose. I would love not to have mine aimed at the patio area like it is now (Ventana)

 

[Rich W.]

This muffler has been successfully added to the Oasis exhaust to quite things down a bit, although if you’re trying to improve flow it might be counter productive

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[Buly]

This morning I drove to Harborfreight and bought an cordless impact driver.
Lifted the coach and in no time removed the 26’ long exhaust pipe. Take a look at the whole assembly
By mistake had the phone on Video. Sorry.

 

[J&JD]

That’s crazy! Mine comes out right in front of the rear wheels. That is often where the water hose and/or the sewer is located but there is never a problem moving them slightly away from where the exhaust is directed. Certainly not an issue.

 

[Buly]

The replacement will be about 3 feet long.

 

[BGMAC]

I put a generator in a 5th wheel I owned many years ago. I fit right up front under the bedroom. I changed the exhaust to run all the way out the back (36ft). I didn’t want noise at night. Had some fun with it. I put a y pipe in an had dual exhaust out the back with chrome tips. Had a lot of looks going down the road.

I just told anyone that asked that the trailer had an extra engine to help me get up the hills.

 

[DKRITTER]

I have a 2013 DS 4318 the pipe exits the Oasis goes back a few feet and then crosses to the passenger side and dumps a few feet in front of the rear duals.

Had to replace it 2 years ago after running over a piece of a truck tire. Just took what was left to a muffler shop and the guy bent me up a new one and a couple of new brackets, easy.

 

[Buly]

Finally today I finished the job. Turned out to be V.3.0. Followed DKRITTER setup and moved the discharge to the passenger side. All I have now is one 90 and 5 ft straight pipe, eliminating about 20’+ pipe and number of bends.
Avoided the clutter around the electrical wire and wet bay hoses. Very pleased with the change. The sound is not laud at all.

 

[PdMeehan]

Just as a FYI my 2014 DSDP 4369 has the Oasis exhaust exiting in front of the duals on the driver's side. It extends just aft of the power reel bay and forward of the wet bay. I make sure the power cord, hose and sewer hose are all away from the exhaust pipe.
It is interesting that Newmar would move that exhaust pipe to different areas of the coach from year to year.