To those who commute in their jeep w/o a top - JeepForum.com

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post #1 of 30 Old 09-25-2011, 02:41 AM Thread Starter
Dmonkey
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1976 CJ5 
 
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To those who commute in their jeep w/o a top

Where does your exhaust dump out so that you dont reak of fuel and are high as a kite when you get there?

Mine is in the worst possible location, exits straight out the back, flush with the tub. If I get it re routed by a shop, rather then guess where a good spot would be, perhaps some of you guys with experience can guide me to the perfect spot so I can enjoy driving my old CJ again.

Thanks!

*edit* I have a bikini top and half doors when I ride around, incase there is a difference between that and no top and doors

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post #2 of 30 Old 09-25-2011, 03:45 AM
diddy2003
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Mine comes out the back left and the pipe points down a little, and to the left, at the tip. I guess that's just the stock location. I have never had an issue with fumes and I run a bikini top with no doors.
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post #3 of 30 Old 09-25-2011, 05:23 AM
gojeepin
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I don't have a problem either. Mine exits straight out the back aimed slightly down.

Vibration? Bump steer? Wandering? Read the article (sticky) on Steering, suspension, and driveline.
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post #4 of 30 Old 09-25-2011, 06:33 AM
EngChase
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I had the same problem. Straight out the back and fumes in the cab. I cut my exhaust pipe just past the rear axle and installed a 90* bend from Advance Auto. My exhaust now exits about 6" behind the rear driver's tire and even with the outside of the tire. Be careful to measure so that you don't interfere with the leaf springs. $20 for the bend and a clamp, an hour to complete and no more fumes. When you cut the pipe, make sure to cut it in a straight/full circle section so the 90 and the clamp will fit snug. You may have to adjust the exhaust hanger if you have one in that area.

1980 CJ7, 258, automatic TF999
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post #5 of 30 Old 09-25-2011, 02:16 PM Thread Starter
Dmonkey
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the issue I'm facing is I have no idea where the hanger locations are on these things. What I do know is mine has a chunk of thick rubber/woven belt with holes drilled for a hanger that is bolted to the rear crossmember and I can't find any other hangers or spots where stock hangers would be, if that's the case I'm rather shocked it hasn't broken off yet.

muffler looks poop welded to a piece of non aluminized pipe.
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post #6 of 30 Old 09-25-2011, 03:04 PM
Nereussailor
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Mine comes out the side right behind the rear wheel. it's turned down about 30* and the pipe is angled. I don't have a problem with a bikini top on, but with the soft top and rear window open it seems to get sucked in sometimes.

I'm not sure what tomorrow will bring, but it can't be any worse than what I've already been through.
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post #7 of 30 Old 09-25-2011, 04:23 PM
noahlon
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headers on a V6. Comes out in front of the rear wheel on both sides. Can be abit noisey if I really get on it!
Just put the top on for the winter.
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post #8 of 30 Old 09-25-2011, 04:52 PM Thread Starter
Dmonkey
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my top is no more, it blew off on the freeway, what remained was tattered chunks
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post #9 of 30 Old 09-25-2011, 05:13 PM
bamasteeler
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Mine comes straight out back, bought a tip that points down from oreillys. Have u ever messed with carb to see if it's running to rich?? Mine was running really rich when I bought it and it had a very strong odor, adjusted fuel/air mix and is way better now. Just a thought.

1980 Jeep CJ7
AMC 258, T176, D300,
AMC 20 REAR, D30 FRONT

1999 XJ CLASSIC
RC 3" front AAL rear
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post #10 of 30 Old 09-25-2011, 06:01 PM
firewalker909
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My dual exhaust exits out at the rear corners at a 45 degree angle. I don't run a top on my CJ5 and there is no exhaust fume problems when driving or stopped.

Like Bamasteeler said, check your carb adjustments, and check for exhaust leaks.
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post #11 of 30 Old 09-25-2011, 06:20 PM
CaliJeeper74
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the guy before us had the exhuast exiting right under the seats on both sides. we could drive for about 10 minutes and then felt a little light headed. we had a shop reroute it from the headers and they put it under the crossmember then it comes to a Y and exits out the back un the drivers side with a 90 degree turndown. Its way nicer having an experneced shop do it all.
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post #12 of 30 Old 09-25-2011, 06:31 PM
CALOcruiser
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A tip to point it down will help. Mine exits on the same stock location with no problem. Sounds like you have a leak. Mine hasd one at the manifold. Smelled like I just mowed the yard when I got to work.

Do you hear a tapping sound from the engine that is rpm dependent? It will be most noticeable when taking off before road noise dominates.
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post #13 of 30 Old 09-25-2011, 06:34 PM
Matt1981CJ7
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What's the problem?

My wife calls it, "Essence of CJ". She says she's kinda fond of it. I love that girl!!

Matt
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post #14 of 30 Old 09-25-2011, 07:07 PM
RidgeRat
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Quote:
Originally Posted by Matt1881CJ7 View Post
What's the problem?

My wife calls it, "Essence of CJ". She says she's kinda fond of it. I love that girl!!

Matt
Good one, I'll use that with my wife.

1980 CJ5, Ford 289, T176, DANA 300, DANA 30, Ford 9", 35/10.50/R15 Super Swamper TSL
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post #15 of 30 Old 09-25-2011, 07:20 PM
BagusJeep
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The standard exhaust in the parts manual has a final section that is bent 45 degrees horizontally and about 10 degrees downwards to go over the rear leaf spring to dump the exhaust out the side just before the corner.

This is a common problem on vehicles and relates to the turbulence in the wake of the vehicle that allows backlayering at speed of air which was below the bumper line back up the rear of the vehicle.

The Jaguar XJ6 when it came out in 1968 was to have dual straight exhausts out of the back like the 420G that preceded it. They ended up with cranks in the exhaust tips to dump the exhaust nearer the corners, and this was a big luxury saloon, not an open vehicle.

Other comments about checking mixture for unburnt hydrocarbons are relevant.

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1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
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