Author Topic: 1968 Mustang exhaust leak  (Read 14596 times)

wcm3232

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1968 Mustang exhaust leak
« on: June 15, 2006, 02:43:37 PM »
I have a 68 Mustang Convertible.  Every time we go for a drive in it we smell like exhaust fumes.  I have had the donuts replaced and can find no exhaust leaks.  Does anyone have any ideas as to what the problem is.  My wife will not ride in the car and that is a problem.

racedraper

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Re: 1968 Mustang exhaust leak
« Reply #1 on: June 15, 2006, 04:23:00 PM »
well after all  you are in a convertable.lol  how is you exhuast routed? out the side or back. I thought the smell what is driving a classic is all about.
 By the way welcome to the site. lets see you stang

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Re: 1968 Mustang exhaust leak
« Reply #2 on: June 18, 2006, 09:12:23 PM »
If there is no leak you see maybe the smell is because the carburator is not good. Is the smoke black?

wcm3232

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Re: 1968 Mustang exhaust leak
« Reply #3 on: June 19, 2006, 08:07:42 AM »
No black smoke and the car runs great.  A little sluggish in the morning but good.  What would I need to do to the carb to fix the problem if that were it?

wcm3232

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Re: 1968 Mustang exhaust leak
« Reply #4 on: June 19, 2006, 08:13:01 AM »
The exhaust is routed out the back.  Dual exhaust and sounds good.  I tried classic car smell line on  my wife several months ago and it fell on deaf ears.  I have wondered before if there were some kind of back draft or something causing the exhaust to enter the cab.  A crazy idea but that is where I am with this.  There are a couple of openings in the firewall. Even without an exhaust leak, could this be the problem?  
Thanks for the help.

  • Guest
Re: 1968 Mustang exhaust leak
« Reply #5 on: June 19, 2006, 07:40:58 PM »
I'am  just thinking  outside the box here. How about the crankcase vent ,, you said the firewall has holes in it . It could be from that insted of exhaust . Can both smell the same.

wcm3232

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Re: 1968 Mustang exhaust leak
« Reply #6 on: June 19, 2006, 08:13:31 PM »
I will take a look at that when I get the time. Thanks for the suggestion.   I am going to seem ignorant but where would the crankcase vent be located?  I am not a mechanic.

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Re: 1968 Mustang exhaust leak
« Reply #7 on: June 20, 2006, 07:04:04 PM »
It's a host from valve cover to bottom of carb. Make sure P V C valve is working, pull it out and shake it . should have a rattle sound .  If not    replace it .

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Re: 1968 Mustang exhaust leak
« Reply #8 on: June 20, 2006, 08:41:46 PM »
I am not a good mecanician but if there is holes in the firewall they must be closed, I am sure the smell will be gone.

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Re: 1968 Mustang exhaust leak
« Reply #9 on: June 22, 2006, 05:20:27 PM »
How true      but  must cars get fresh air from just in front of windshield. As air ffows over hood it hits windshield. This makes a high pressure area at base of it . It's forced into louvers between windshield and back of hood. And most hoods don't seal 100%. Air from engine area can be pulled into car.

Ken Moore

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Re: 1968 Mustang exhaust leak
« Reply #10 on: December 13, 2006, 06:21:53 PM »
The exhaust you smell is more than likely rolling up into the trunk area and then through the rear seat. check the trunk seal and look for any rot in the trunk pan and rear fender wells.

my 66 hardtop does this also ,but only with the windows down. the arrodynamics (very little) causes a slite vacuum (I guess) in the cab and draws in air from wherever and of course it will be by the exhaust... go figure!    I have a small rot spot and bad trunk seal.  And no rear speakers just the holes.

bernie

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Re: 1968 Mustang exhaust leak
« Reply #11 on: October 15, 2007, 05:28:56 PM »
Your exhaust tips aren't below the body line or not out the back far enough. I've had this problem on a 65 convertible, 66 convertible and a 69 shelby. Go buy pipes to extend  the tail pipes and the fumes will go away.

mustangluver

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Re: 1968 Mustang exhaust leak
« Reply #12 on: August 28, 2009, 09:36:13 PM »
your floor could be rotted as well. check the firewall, floor and the trunk

Soaring

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Re: 1968 Mustang exhaust leak
« Reply #13 on: August 28, 2009, 10:10:56 PM »
This thread is like 4 years old.  I haven't heard from these posters in several years.   ;D

mustangluver

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Re: 1968 Mustang exhaust leak
« Reply #14 on: August 28, 2009, 10:14:21 PM »
lol it gave me the lil warning. the world may never know wat he ended up doing however.

 

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