I smell like exhaust... - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > I smell like exhaust...

Nitro Gear Packages Now Available at Rockridge 4wdGear Packages Available! Your # 1 Diff Shop is ROCKRIDGE 4SPARTAN LOCKERS are on sale BIG TIME at ROCKRIDGE 4WD!

Reply
Unread 12-01-2009, 05:17 PM   #1
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?

jeepside2.jpg  
dmjonez is offline   Reply With Quote
Unread 12-01-2009, 05:36 PM   #2
crrushing
Registered User
1986 CJ7 
 
Join Date: Jan 2008
Location: Madison, MS
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   Reply With Quote
Unread 12-01-2009, 05:48 PM   #3
gmakra
Registered User
1985 CJ7 
 
Join Date: Jun 2008
Location: Chicago area
Posts: 2,783
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   Reply With Quote
Unread 12-01-2009, 05:53 PM   #4
keith460
Jeep. There's Only One
 
keith460's Avatar
1984 CJ7 
 
Join Date: Jan 2007
Location: Doylestown, PA
Posts: 4,846
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   Reply With Quote
Unread 12-01-2009, 06:33 PM   #5
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   Reply With Quote
Unread 12-01-2009, 07:31 PM   #6
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   Reply With Quote
Unread 12-01-2009, 07:51 PM   #7
keith460
Jeep. There's Only One
 
keith460's Avatar
1984 CJ7 
 
Join Date: Jan 2007
Location: Doylestown, PA
Posts: 4,846
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   Reply With Quote
Unread 12-01-2009, 08:16 PM   #8
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   Reply With Quote
Unread 12-01-2009, 08:28 PM   #9
jeepdaddy2000
Web Wheeler
 
jeepdaddy2000's Avatar
1971 CJ5 
 
Join Date: Jan 2002
Location: Eagle Point Oregon
Posts: 6,199
Kick outs that bring the tips parallel or just past the body should eliminate this problem.
jeepdaddy2000 is offline   Reply With Quote
Unread 12-01-2009, 08:55 PM   #10
SpencerC
Registered User
1978 CJ7 
 
Join Date: Sep 2008
Location: Goodrich, Michigan, USA
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   Reply With Quote
Unread 12-02-2009, 07:29 AM   #11
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   Reply With Quote
Unread 12-02-2009, 07:47 AM   #12
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   Reply With Quote
Unread 12-02-2009, 07:54 AM   #13
Mike Romain
Registered User
1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 13,152
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   Reply With Quote
Unread 12-04-2009, 12:18 PM   #14
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...
newpipes.jpg   newbackpipes.jpg  
dmjonez is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.