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All About Exhaust Systems

142 messages,  Last post on Mar 06, 2012 at 1:09 PM

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What is this discussion about? Exhaust, Diesel, Fuel Efficiency (MPG), Car Warranties, Coupe, Convertible, Hatchback, Truck, Sedan, Wagon, SUV, Van

Messages Page 15 of 15

#136 of 142 Re: Exhaust smells only when passing(excellerating) [Mr_Shiftright] by aggiedog

Aug 08, 2011 (9:05 am)

Replying to: Mr_Shiftright (Aug 07, 2011 6:17 pm)
I wondered that too initially. I used a high pressure washer around the entire rear end and no water got in. I know air is different but there were no leaks at all for water. Also the smell originates from the passenger side floor area. it also comes in from the front windows if they are down.

#137 of 142 Re: Exhaust smells only when passing(excellerating) [aggiedog] by Mr_Shiftright HOST

Aug 08, 2011 (9:47 am)

Replying to: aggiedog (Aug 08, 2011 9:05 am)
Yes air pressure is different. What happens is that an auction pressure differential occurs in the car, and thus exhaust is sucked into the car as air moves around the cracks/openings.
 
It's also possible that some other seam can allow gases to be sucked in, that's true.
 
One possible but not conclusive test would be to button up the truck tightly so that there are no vents, no windows, nothing open, then drive and see if you smell something. If not, then crack a window--if suddenly the odor gets strong, then yes, there is some seal or seam that is not right.
 
As for a leak in the exhaust system itself---the smoke test is a bit wussy---I mean, one way might be to stuff a rag in the tailpipe (well,hold it over the tail pipe tightly), while the truck is on a rack, and have another person test/listen for a slight exhaust leak===in a pipe or even in the exhaust manifold gasket.
 
You only need the tiniest of leaks to create this odor because when accelerating, there's a lot of force in the exhaust pipe.
 
In any event, this is a safety issue that has to be addressed.

#138 of 142 what the hell is this pipe? by slizzard

Sep 07, 2011 (2:44 pm)

hey yall i love cars but i don't really know much about them. i found what looks like a y pipe in my shed when i moved into my new house. its about 3-4 feet long and y's into two pipes and then at the end y's again into 4 exhaust tips. it it almost all black except at the tips there is a yellow stripe and then silver tip. it doesn't have any markings on it to tell me what it is or who made it. can someone tell me what kind of exhaust this is? or maybe someone was building their own exhaust? help i'd like to sell if i can!

#139 of 142 Re: what the hell is this pipe? [slizzard] by Mr_Shiftright HOST

Sep 07, 2011 (4:03 pm)

Replying to: slizzard (Sep 07, 2011 2:44 pm)
Maybe if you could post a picture---put it on photobucket or some such hosting service and then use the "IMG" button below to insert the URL for it.

#140 of 142 Exhaust collector by scott229

Sep 19, 2011 (11:31 am)

For a custom exhaust system, I need 3 bolt flanged collector with the bolt ring diameter 2.5 inches and the pipe i.d. 2 inches, plus or minus 1/4". It seems there must be cars that use about that size, but in looking at catalogs for replacement parts, I'm not finding any that give the actual dimensions. Does anyone know what car would use this size of collector? Generic ones that I've found don't come with a pipe i.d. of less than 2.5" which would mean their bolt ring diameter would be about 2.75". Here is a link to one of them for reference.
 
http://www.jegs.com/i/JEGS-Performance-Products/555/30002/10002/-1?parentProduct- Id=751310
 
Any help will be appreciated.

#141 of 142 F-350 ENGINE EXHAUST CLEANER by f350kingranch

Mar 05, 2012 (6:28 pm)

I have a 2009 F-350 Super Duty (King Ranch) Diesel. There is an engine exhaust cleaner with this vehicle. The exhaust cleaner activates every 300 kms (185 miles). When the exhaust cleaner is activated you are suppose to continuously drive at 80 kms or faster (50 miles/hour) until the exhaust cleaner has completed it's cycle. The problem that I have is when you can't continuously drive 80 kms or faster until the cycle has completed. This happens when I am driving in the city. In this instance blue smoke will bellow out of the exhaust pipe. Not a good thing to see. Nobody likes to see an excessive amount of blue smoke bellowing out of the exhaust pipe. Is this normal? The Ford technician tells me that you have to drive it on the highway and there won't be any blue smoke. I find this odd and believe that there is something else wrong with the vehicle. Any advice

#142 of 142 Re: F-350 ENGINE EXHAUST CLEANER [f350kingranch] by dtownfb

Mar 06, 2012 (1:09 pm)

Replying to: f350kingranch (Mar 05, 2012 6:28 pm)
Here's a discussion from a Ford Truck board: http://www.ford-trucks.com/forums/1062777-exhaust-cleaning-mode.html
 
Hope this helps.

Messages Page 15 of 15

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