Question Issues with rotating exhaust downturn 45 degrees outward?

[TJ&LadyDi]

Yesterday, I rotated the exhaust down-turn on the MADP about 45 degrees outward in an attempt to direct some heat away from the toad right front tire. We have experienced a 15-20 degree heat difference on that tire in hot weather (not unusual) and it occasionally causes our TPMS to indicate an excess temperature. It is not enough to be a problem, but having the alarm go off is disconcerting.

Last night, I got to wondering if there are any possible issues with this exhaust redirection when the DPF regen occurs. I don't think this should be an issue because the heat is still directed down and away from the coach bodywork. Just curious if anyone that has made this change has experienced any issues?

We don't get on the road for another week, so have not yet been able to test whether this exhaust redirection resolves the toad tire heating on the right front corner.

TJ

 

[bobnjill410]

TJ, We experienced the same identical issue as you with the right front toad tire temperature. I redirected the exhaust outward approximately 15 to 20 degrees with positive results on the tire temperature and no issues with the exhaust discharge.
BobnJill

 

[CaptainGizmo]

Hmmmmm....that may be a good idea.

I’ve noticed a smell during Regen, too, that I’d like to diagnose and fix.

 

[Sealyn]

Just pay close attention to your body work. I have read about paint and fiberglass damage caused by exhaust heat when exhaust was redirected.

 

[TJ&LadyDi]

Just pay close attention to your body work. I have read about paint and fiberglass damage caused by exhaust heat when exhaust was redirected.

Thanks! I reduced the out-turn a bit today, leaving it at about 30 degrees instead of the 45+ I had it before. We'll try it this way and see how it works. I will keep an eye on the the bodywork temp but I think it will be fine.

TJ

 

[J&JD]

For the better part of 2 years and 30000 of some serious grade climbing miles I have had zero issues with my exhaust tip turned out around 45 degrees. I also have never had a regen light. Turning the tip does help a bit, maybe 20% or so with the RF toad tire temp. It still can read close to 20 degrees higher, especially on a slow steep grade, than either of the DS tires using the TST system.

 

[bobnjill410]

I should have explained my actions in more detail, as I did turn my outlet 45 deg initially but needed to back off due to exhaust hitting the body. That’s why I ended up with only a 20 degree move. I apologize for not being more detailed in my original post.
bobnjill410

 

[Old-RV'er]

For us folks with the rear radiator, everything back there gets hot, will see how alignment with jeep is before I try to turn it some, as that is great idea on tire temperature.

 

[J&JD]

Thought I would post a photo of my RR and exhaust tip. As you can see there is no damage to the coach whatsoever after 30k+ miles with many long steep climbs out west.

 

[TJ&LadyDi]

Thought I would post a photo of my RR and exhaust tip. As you can see there is no damage to the coach whatsoever after 30k+ miles with many long steep climbs out west.

My exhaust tip is not rotated quite that much, but on the trip home from Polson, both front tires on the toad were within a degree or two of each other in temperature. Previously, there was a 15-20 degree difference.

Now, this was in moderate temperatures (50-60 degrees), so I don't know if summer temperatures will have the same results. Interestingly enough, we had a DPF Regen occur on the trip and I did observe a temporary increase of about 5 degrees on the toad right front. After the Regen ended, the RF toad tire returned to the same as the LF.

I'm thinking that the rotation helps.

TJ