Do not get water in your tailpipe - Page 2 - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > 2014+ Jeep Grand Cherokee Ecodiesel 3.0

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #13  
Old 09-28-2014, 06:33 AM
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Mar 2013
Location: Brisbane QLD Australia
Posts: 896
Thanks: 15
Thanked 50 Times in 43 Posts
Rep Power: 3118
iboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond repute
The pressure of the exhaust gasses escaping would be enough to flush the system of all moisture, as it does with condensation.

__________________
2014 Maximum Steel Overland, but the misses won't let me drive it!
Reply With Quote
Sponsored Links
Advertisement
 
  #14  
Old 09-28-2014, 08:16 AM
ExcursionDiesel's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Apr 2013
Location: W. TN.
Posts: 1,849
Thanks: 16
Thanked 284 Times in 196 Posts
Rep Power: 4102
ExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond repute
Re: Do not get water in your tailpipe

Quote:
Originally Posted by iboughtajeep View Post
The pressure of the exhaust gasses escaping would be enough to flush the system of all moisture, as it does with condensation.
Correct. So what happens if you shut the motor off then wash your Jeep?

---------- Post added at 07:16 AM ---------- Previous post was at 07:09 AM ----------

Quote:
Originally Posted by nicjak View Post
So you saying dont drive on rainy wet roads same water hitting pipes
I'm saying that submerging the cat while running is bad for the cat....bad for ANY cat. But a diesel cat is at twice the normal temperature during regen. I would avoid intentionally quenching it with water.

Driving in rain isn't a thermal shock. Crashing through deep water after a rain with a 1200F cat is. The sudden change in temperature is damaging.
__________________
----------------------
The founder of JeepGarage.org, Scottina06, has a son Max who is in need of corrective surgery from an infection at birth that left one leg 4 inches short. We need to support our Jeep brothers. His family has started a fund on giveforward.com. If you have ever been helped by someone else, now is a good time to pay it forward. Here is a link to that page. God bless you! http://gfwd.at/1rz33PW
Reply With Quote
  #15  
Old 09-28-2014, 09:53 AM
bill_de's Avatar
Premium Member
My Jeep: 2017 5.7L WK2
 
Join Date: Sep 2012
Posts: 8,536
Thanks: 725
Thanked 1,039 Times in 812 Posts
Rep Power: 1805839
bill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond reputebill_de has a reputation beyond repute
Re: Do not get water in your tailpipe

Quote:
Originally Posted by ExcursionDiesel View Post
Correct. So what happens if you shut the motor off then wash your Jeep?

---------- Post added at 07:16 AM ---------- Previous post was at 07:09 AM ----------

I'm saying that submerging the cat while running is bad for the cat....bad for ANY cat. But a diesel cat is at twice the normal temperature during regen. I would avoid intentionally quenching it with water.

Driving in rain isn't a thermal shock. Crashing through deep water after a rain with a 1200F cat is. The sudden change in temperature is damaging.
I think the JGC is rated to drive through 20" of water. With the position of the CAT, do they have to retract that for the diesels?


---
__________________
If you need a shoulder to cry on ...
... pull over to the side of the road!

Reply With Quote
  #16  
Old 09-28-2014, 10:21 AM
f1anatic's Avatar
Premium Member
My Jeep: 2014 3.6L WK2
 
Join Date: Jan 2013
Location: Chicago, IL
Posts: 1,760
Thanks: 82
Thanked 215 Times in 155 Posts
Rep Power: 160087
f1anatic has a reputation beyond reputef1anatic has a reputation beyond reputef1anatic has a reputation beyond reputef1anatic has a reputation beyond reputef1anatic has a reputation beyond reputef1anatic has a reputation beyond reputef1anatic has a reputation beyond reputef1anatic has a reputation beyond reputef1anatic has a reputation beyond reputef1anatic has a reputation beyond reputef1anatic has a reputation beyond repute
Re: Do not get water in your tailpipe

This is getting more and more interesting. First the diesels were these supper impressive fuel sipping monsters that ended up being a mere 3 mpg on average more fuel efficient mostly only in urban cycles. Next, they were overheating when towing or driving uphill. Now you can't drive them thru ankle deep water for fear of splashes on the catalytic converter. So much for the diesel engine choice as being the holy grail of off-readers and long distance haulers.

Either some of you are over-exaggerating certain design flaws or weaknesses of the vehicle... or Chrysler majestically screwed up. And I personally think it is a combo here, with some 75% of the story being an exaggeration, with the rest just factory hype about a vehicle that is not quite as good, economical and reliable as advertised.
Reply With Quote
  #17  
Old 09-28-2014, 11:38 AM
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Sep 2014
Location: here
Posts: 10
Thanks: 1
Thanked 1 Time in 1 Post
Rep Power: 915
mopeman is on a distinguished road
Re: Do not get water in your tailpipe

Not gonna happen...I'm not calling anybody out, but there is no way possible to get water in the cats unless you have the vehicle parked on at least a 10% grade nose down. The cats are located on the down pipe on each bank right next to the motor in an upward angle. Engineers have figured out the closer the cat is to the motor, the cat can use the heat from combustion to help do its job. The first canister you see if you follow the exhaust from the rear forward is the DPF (diesel particulate filter). This does look like the low point of the exhaust. I'm not sure if water were to enter it from the tailpipes it would cause any issues but I doubt it. The mufflers do have weep holes for condensation to escape. I would also venture a guess that if water were to enter the exhaust system while hot, it would evaporate quickly. If entering a cold system, it would be blown out and/or evaporate.
Reply With Quote
The Following User Says Thank You to mopeman For This Useful Post:
  #18  
Old 09-28-2014, 02:38 PM
ExcursionDiesel's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Apr 2013
Location: W. TN.
Posts: 1,849
Thanks: 16
Thanked 284 Times in 196 Posts
Rep Power: 4102
ExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond repute
Re: Do not get water in your tailpipe

Quote:
Originally Posted by mopeman View Post
Not gonna happen...I'm not calling anybody out, but there is no way possible to get water in the cats unless you have the vehicle parked on at least a 10% grade nose down. The cats are located on the down pipe on each bank right next to the motor in an upward angle. Engineers have figured out the closer the cat is to the motor, the cat can use the heat from combustion to help do its job. The first canister you see if you follow the exhaust from the rear forward is the DPF (diesel particulate filter). This does look like the low point of the exhaust. I'm not sure if water were to enter it from the tailpipes it would cause any issues but I doubt it. The mufflers do have weep holes for condensation to escape. I would also venture a guess that if water were to enter the exhaust system while hot, it would evaporate quickly. If entering a cold system, it would be blown out and/or evaporate.
Incorrect. There may be cats near the manifolds on gassers but not our diesels. Its after the first y-pipe where the DEF injector is located, Crawl under and take a look.

With regards to Chrysler engineering a lemon, I don't think so. The overheating issue was proven wrong. The loss of economy...not mine, it has been better than EPA. I hope I'm wrong on the Cat...but you guys need to read what I wrote. I'm suggesting that a 1200F cat shouldn't be quenched. This is true for any cat but ours is located near the end of the tailpipe and runs really hot during regen.
__________________
----------------------
The founder of JeepGarage.org, Scottina06, has a son Max who is in need of corrective surgery from an infection at birth that left one leg 4 inches short. We need to support our Jeep brothers. His family has started a fund on giveforward.com. If you have ever been helped by someone else, now is a good time to pay it forward. Here is a link to that page. God bless you! http://gfwd.at/1rz33PW
Reply With Quote
  #19  
Old 09-28-2014, 03:16 PM
netboy's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2013
Location: CT
Posts: 393
Thanks: 44
Thanked 89 Times in 54 Posts
Rep Power: 581799
netboy has a reputation beyond reputenetboy has a reputation beyond reputenetboy has a reputation beyond reputenetboy has a reputation beyond reputenetboy has a reputation beyond reputenetboy has a reputation beyond reputenetboy has a reputation beyond reputenetboy has a reputation beyond reputenetboy has a reputation beyond reputenetboy has a reputation beyond reputenetboy has a reputation beyond repute
Re: Do not get water in your tailpipe

Quote:
Originally Posted by ExcursionDiesel View Post
I'm suggesting that a 1200F cat shouldn't be quenched. This is true for any cat but ours is located near the end of the tailpipe and runs really hot during regen.
Is the SCR running at 1200F during a regen? I thought the upstream facing side of the DPF is. This is downstream the cooler side of the DPF. Also, if the SCR ceramics are so sensitive to water, how can they tolerate the almost constant mist of DEF (which is essentially water) splashed on their hot side?
__________________
Summit 4x4 Turbo-Diesel, Black / Jeep Brown.
Reply With Quote
  #20  
Old 09-28-2014, 03:30 PM
ExcursionDiesel's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Apr 2013
Location: W. TN.
Posts: 1,849
Thanks: 16
Thanked 284 Times in 196 Posts
Rep Power: 4102
ExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond repute
Re: Do not get water in your tailpipe

Quote:
Originally Posted by netboy View Post
Is the SCR running at 1200F during a regen? I thought the upstream facing side of the DPF is. This is downstream the cooler side of the DPF. Also, if the SCR ceramics are so sensitive to water, how can they tolerate the almost constant mist of DEF (which is essentially water) splashed on their hot side?
Yes, the SCR is within 50F of the DPF and can be higher for several minutes after working the vehicle hard. I monitor EGT, DPF, and CAT temps.

The DEF is a controlled mist not a quench. A quench would cool the CAT several hundred degrees in a short time. The CAT holds a tremendous amount of heat and normally cools very slowly. Right now I have been idling in a traffic jam for 10 minutes and the CAT temp is still higher than the EGT and DPF. I was running 75 mph for 2 hours prior to that.
__________________
----------------------
The founder of JeepGarage.org, Scottina06, has a son Max who is in need of corrective surgery from an infection at birth that left one leg 4 inches short. We need to support our Jeep brothers. His family has started a fund on giveforward.com. If you have ever been helped by someone else, now is a good time to pay it forward. Here is a link to that page. God bless you! http://gfwd.at/1rz33PW
Reply With Quote
  #21  
Old 09-28-2014, 03:33 PM
ExcursionDiesel's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Apr 2013
Location: W. TN.
Posts: 1,849
Thanks: 16
Thanked 284 Times in 196 Posts
Rep Power: 4102
ExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond repute
Re: Do not get water in your tailpipe

CAT temp after a 10 minute idle. It was 650F prior to that. If I had stopped and shut down, it would take much longer to cool. The point is that if I was regening it would have been 1200F and accidentally spraying water in the pipe can't be good...so don't.
Attached Images
File Type: jpg uploadfromtaptalk1411932755067.jpg (50.3 KB, 23 views)
__________________
----------------------
The founder of JeepGarage.org, Scottina06, has a son Max who is in need of corrective surgery from an infection at birth that left one leg 4 inches short. We need to support our Jeep brothers. His family has started a fund on giveforward.com. If you have ever been helped by someone else, now is a good time to pay it forward. Here is a link to that page. God bless you! http://gfwd.at/1rz33PW
Reply With Quote
  #22  
Old 09-28-2014, 05:25 PM
Member
My Jeep: 2012 WK2
 
Join Date: Mar 2012
Posts: 934
Thanks: 39
Thanked 43 Times in 39 Posts
Rep Power: 1232737
2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute2012 Summit has a reputation beyond repute
Re: Do not get water in your tailpipe

Quote:
Originally Posted by f1anatic View Post
This is getting more and more interesting. First the diesels were these supper impressive fuel sipping monsters that ended up being a mere 3 mpg on average more fuel efficient mostly only in urban cycles. Next, they were overheating when towing or driving uphill. Now you can't drive them thru ankle deep water for fear of splashes on the catalytic converter. So much for the diesel engine choice as being the holy grail of off-readers and long distance haulers.

Either some of you are over-exaggerating certain design flaws or weaknesses of the vehicle... or Chrysler majestically screwed up. And I personally think it is a combo here, with some 75% of the story being an exaggeration, with the rest just factory hype about a vehicle that is not quite as good, economical and reliable as advertised.
Sounds like you wish you had the diesel.
Reply With Quote
  #23  
Old 09-29-2014, 04:29 PM
fun2drive's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Mar 2013
Location: Florida Panhandle/ Ohio
Posts: 831
Thanks: 17
Thanked 102 Times in 79 Posts
Rep Power: 3516
fun2drive has a reputation beyond reputefun2drive has a reputation beyond reputefun2drive has a reputation beyond reputefun2drive has a reputation beyond reputefun2drive has a reputation beyond reputefun2drive has a reputation beyond reputefun2drive has a reputation beyond reputefun2drive has a reputation beyond reputefun2drive has a reputation beyond reputefun2drive has a reputation beyond reputefun2drive has a reputation beyond repute
Re: Do not get water in your tailpipe

It could well be a latent defect in the bonding of the ceramic to the cat housing. I have seen this and they will rattle free. I don't think driving in hard rain or flooded areas cause any issues. I drove through 6 hours of hurricane like rain from Houston to Florida at night when I picked my ride up (yeah that was fun). No issues but after some time it is possible to get a defect to show where the ceramic starts to fail with no owner causing it. I would think unless the cat is very hot that the water in the tail pipe might be less likely but feasible.
__________________
Overland Deep Cherry Red/ LT Biege Inter/ Diesel/ ATG
Reply With Quote
  #24  
Old 09-29-2014, 04:57 PM
ExcursionDiesel's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Apr 2013
Location: W. TN.
Posts: 1,849
Thanks: 16
Thanked 284 Times in 196 Posts
Rep Power: 4102
ExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond reputeExcursionDiesel has a reputation beyond repute
Re: Do not get water in your tailpipe

Quote:
Originally Posted by fun2drive View Post
I would think unless the cat is very hot that the water in the tail pipe might be less likely but feasible.
Is 1200F hot enough? Thats the temperature of the Cat during regen and for several minutes afterwards since it cools slowly. Normal operation is half that temperature. I agree that driving in rain isn't going to quench the converter but submersion in deep.water will, and ingestion down the pipe...who knows?

We are having an unusual failure rate, no doubt.
__________________
----------------------
The founder of JeepGarage.org, Scottina06, has a son Max who is in need of corrective surgery from an infection at birth that left one leg 4 inches short. We need to support our Jeep brothers. His family has started a fund on giveforward.com. If you have ever been helped by someone else, now is a good time to pay it forward. Here is a link to that page. God bless you! http://gfwd.at/1rz33PW
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Water or Liquid sloshing sound but no water anywhere stech Grand Cherokee - WK2 - 5 05-18-2014 05:16 PM
Can I get your opinion on this Jeep as my Winter Vehicle? HEMISFEAR Grand Cherokee - WJ 8 11-03-2010 09:18 AM
how hot does your engine get> jeeppro Grand Cherokee - WK 28 08-11-2009 12:53 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:07 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.