I smell like exhaust... - JeepForum.com

 
LinkBack Thread Tools
post #1 of 14 Old 12-01-2009, 05:17 PM Thread Starter
dmjonez
Junior Member
 
dmjonez's Avatar
1971 CJ5 
 
Join Date: Nov 2009
Location: Kennesaw, GA
Posts: 55
I smell like exhaust...

Well maybe not all the time, but after I drive my CJ. It has very short pipes that exhaust under the doors. Or holes for the doors, as I don't have any..

Anyway, my wife and daughter complain of the exhaust smell anytime I go for a long drive. I'm thinking of getting new pipes which vent under the rear bumper.

Think that would help, or is "eau de unleaded" just a normal side-effect? Or do I need doors?

Attached Thumbnails
jeepside2.jpg  
dmjonez is offline  
Sponsored Links
Advertisement
 
post #2 of 14 Old 12-01-2009, 05:36 PM
crrushing
Registered User
1986 CJ7 
 
Join Date: Jan 2008
Location: Madison
Posts: 78
I have the same problem about smelling like gas or exhaust, but mine is because of the edelbrock 1403 500cfm carb 4BBL on the stock I6 (way too big). I just bought and received a holley 4bbl 390 to replace it, and I hope the gas/exhaust smell is minimized.
crrushing is offline  
post #3 of 14 Old 12-01-2009, 05:48 PM
gmakra
Registered User
1985 CJ7 
 
Join Date: Jun 2008
Location: Chicago area
Posts: 3,560
Run your pipes all the way back. The vortex created by you Jeep moving down the road is sucking the fumes back in the cab area.
gmakra is offline  
post #4 of 14 Old 12-01-2009, 05:53 PM
keith460
Jeep. There's Only One
 
keith460's Avatar
1984 CJ7 
 
Join Date: Jan 2007
Location: Doylestown, PA
Posts: 6,454
You need to get the exhaust pipes out the back corners just behind the rear wheels or that smell and dangerous CO2 is gonna kill you and your family. It is the ideal spot to route exhaust and it's what the factory does also. Also, it's a good idea to angle cut the very end of the tailpipe tip reduce vortex and pulsing rings of exhaust

.
1984 CJ-7 Renegade
__________________

Restoration Thread:http://www.jeepsunlimited.com/forums...d.php?t=434226
keith460 is online now  
post #5 of 14 Old 12-01-2009, 06:33 PM Thread Starter
dmjonez
Junior Member
 
dmjonez's Avatar
1971 CJ5 
 
Join Date: Nov 2009
Location: Kennesaw, GA
Posts: 55
Thanks for the replies. I'm taking it in on Thursday to have new pipes made. Any other thoughts or suggestions?
dmjonez is offline  
post #6 of 14 Old 12-01-2009, 07:31 PM
coolhandx1
Registered User
1979 CJ7 
 
Join Date: Sep 2009
Location: MA
Posts: 3
I have the same issue with fumes on my 79 CJ7. My exhaust comes straight out the back and the fumes just roll up and in without any top on, which is the way I like to drive it. I have been considering turning it behind the rear tire and based on what I just read I think its a done deal. After 30 minutes driving around I feel pretty light headed. The old Carter carb is not helping with the fumes either, new carb is the next project. I have seen some that route the pipe through the leaf spring, not sure I like that. In regards to the angle cut, slight angle to the rear?
coolhandx1 is offline  
post #7 of 14 Old 12-01-2009, 07:51 PM
keith460
Jeep. There's Only One
 
keith460's Avatar
1984 CJ7 
 
Join Date: Jan 2007
Location: Doylestown, PA
Posts: 6,454
Quote:
Originally Posted by coolhandx1 View Post
In regards to the angle cut, slight angle to the rear?
Something like this:

.
1984 CJ-7 Renegade
__________________

Restoration Thread:http://www.jeepsunlimited.com/forums...d.php?t=434226
keith460 is online now  
post #8 of 14 Old 12-01-2009, 08:16 PM
shok47
Registered User
1983 CJ7 
 
Join Date: May 2009
Posts: 396
how does the placement of mine look? Should I angle cut it like yours?


shok47 is offline  
post #9 of 14 Old 12-01-2009, 08:28 PM
jeepdaddy2000
Registered User
 
jeepdaddy2000's Avatar
1971 CJ5 
 
Join Date: Jan 2002
Location: Eagle Point
Posts: 7,136
Kick outs that bring the tips parallel or just past the body should eliminate this problem.
jeepdaddy2000 is offline  
post #10 of 14 Old 12-01-2009, 08:55 PM
SpencerC
Registered User
1978 CJ7 
 
Join Date: Sep 2008
Location: Goodrich
Posts: 165
Mine are the same way on my 7, true duals off the 304 to almost exactly where you have them. Neither with the hard top/full doors or bikini/doorless like your setup, do I ever smell exhaust. You can probably play with how much it sticks out the side and be fire rather than running it out the back.

'78 Jeep CJ-7 - 304/3 speed
SpencerC is offline  
post #11 of 14 Old 12-02-2009, 07:29 AM
skclark
Registered User
1982 CJ7 
 
Join Date: Oct 2009
Location: Sarasota, FL
Posts: 166
I had the same issue.
1. Check for exhaust leaks when its cold by holding your hand around each joint.
2. make sure tailpipe dumps behind rear wheel.

I replaced my muffler, clamped it up, drove to a local muffler shop and for 20 bucks he welded it up for me. No more gas smell no more UPS truck sound. Using a cheap bolt on tailpipe extender I tried a couple different angles to see if it made it any better for me. Lower to the ground etc. and what I found was the exhaust leak at the muffler made the biggest difference. As long as the exhaust is dumping out behind the rear tire and you don't get stuck behind a diesel dump truck you should be much better off!
skclark is offline  
post #12 of 14 Old 12-02-2009, 07:47 AM
green cj 78
Registered User
1978 CJ7 
 
Join Date: Apr 2005
Location: Rancho Bernardo
Posts: 316
Quote:
Originally Posted by keith460 View Post
You need to get the exhaust pipes out the back corners just behind the rear wheels or that smell and dangerous CO2 is gonna kill you and your family. It is the ideal spot to route exhaust and it's what the factory does also. Also, it's a good idea to angle cut the very end of the tailpipe tip reduce vortex and pulsing rings of exhaust
The dangerous thing is CO (Carbon Monoxide) although CO2 would be dangerous, but unlikely in a well ventilated cabin.

Cheap fix, try angling the exhaust tips 90 degrees and point them to the ground. This may fix your problem.

78 CJ7
5.3 Vortec, T18, Dana 20, AMC 20, Dana 30
97 XJ 2wd POS.
green cj 78 is offline  
post #13 of 14 Old 12-02-2009, 07:54 AM
Mike Romain
Registered User
1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant
Posts: 18,089
Jeep put them in the right place, coming out on a 45 between the frame and spring at the back with a chopped tip angled down/out. I just put an OEM system on mine. This makes for the best smell.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
Mike Romain is offline  
post #14 of 14 Old 12-04-2009, 12:18 PM Thread Starter
dmjonez
Junior Member
 
dmjonez's Avatar
1971 CJ5 
 
Join Date: Nov 2009
Location: Kennesaw, GA
Posts: 55
I just got the CJ back from the shop with new pipes. I didn't have them angle cut, as the guy and I discussed the look, and he said he'd trim them later if I weren't happy. He imitated the stock pipe placement, and NO SMELL!
I've driven around for about 5-10 miles with no smell or fumes. One of the mufflers was popped as well, probably from an earlier backfire. The new setup was worth the trouble and not much cash...
Attached Thumbnails
newpipes.jpg   newbackpipes.jpg  
dmjonez is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Help with exhaust smell noshine84 Jeep CJ Forum 10 03-07-2008 11:50 AM
Exhaust Smell Question tom fuerst Jeep CJ Forum 12 10-25-2006 02:19 PM
Will a cat decrease exhaust smell? ChiliPepperTJ Jeep CJ Forum 5 03-07-2006 12:49 PM
gas/exhaust smell certifiablejeep Jeep CJ Forum 11 08-31-2004 03:51 AM
Strong Gas Exhaust Smell ravinhuxley Jeep CJ Forum 5 02-28-2004 09:37 PM

Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome