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Old 08-09-2018, 11:25 PM   #1
StrnWolf
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Default What Does Factory Exhaust System Look Like?

On my 95 SL2 I was under the car to replace a coolant hose, and it appears to me that the exhaust system may not be OEM, and in CA if you change the exhaust system you fail inspection. I did not take a deep look but what caught my eye was a random screw that appears to do nothing there in the exhaust line. So my question is, what does the factory exhaust system look like for my Saturn? Also, is there for any reason a screw that appears to do nothing? It is in the section of pipe that starts to go under the body of car from the engine compartment.

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Old 08-10-2018, 06:38 AM   #2
Waiex191
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Default Re: What Does Factory Exhaust System Look Like?

My system is original. There are some incidental pictures in my thread, but not before page 7.
http://www.saturnfans.com/forums/sho...=230898&page=7

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Old 08-10-2018, 11:05 AM   #3
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Default Re: What Does Factory Exhaust System Look Like?

Post a picture of that screw. If it isn't OEM, maybe we can think of a plausible explanation for it. My understanding is nothing other than the cat has to be OEM/CARB-exempted.

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Old 08-10-2018, 07:25 PM   #4
StrnWolf
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Default Re: What Does Factory Exhaust System Look Like?

I will post a photo tomorrow, but for now I took a second look and it appears everything is where it should be. That is good news, but there is bad news. Looks like there may be some exhaust leaks because the connection points look very rust and very rugged, so not sure if there is a full seal. The CAT I know for sure is not original so I will be looking for the ID number when I go under car, also it is welded to the front pipe, so if I need a new CAT I need a new front pipe.

How would I check for leaks in the exhaust system?

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Old 08-10-2018, 07:35 PM   #5
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Default Re: What Does Factory Exhaust System Look Like?

You should not replace the front pipe. A sawzall will remove the cat if required so a proper replacement can be welded into place.

Leak check.
--Locate a low pressure high volume air source, reversible vacuum cleaner, large fan, leaf blower or what ever you can find.
--Loosely couple to cold exhaust at the tail pipe, or direct fan at tail pipe.
--Spray every inch of the exhaust between the head and CAT outlet flange with a mixture of 2 or 3 drops of dish soap and water in a spray bottle.
--Pay close attention to the lower flange, lower support clamp, and flex connector.
--The flex connector is under the protective braid so it requires quite a bit of solution to show any leaks.

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Old 08-10-2018, 10:57 PM   #6
StrnWolf
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Default Re: What Does Factory Exhaust System Look Like?

Quote:
Originally Posted by OldNuc View Post
You should not replace the front pipe. A sawzall will remove the cat if required so a proper replacement can be welded into place.

Leak check.
--Locate a low pressure high volume air source, reversible vacuum cleaner, large fan, leaf blower or what ever you can find.
--Loosely couple to cold exhaust at the tail pipe, or direct fan at tail pipe.
--Spray every inch of the exhaust between the head and CAT outlet flange with a mixture of 2 or 3 drops of dish soap and water in a spray bottle.
--Pay close attention to the lower flange, lower support clamp, and flex connector.
--The flex connector is under the protective braid so it requires quite a bit of solution to show any leaks.
I only have ONE device that may be able to do job, but I need confirmation if it would work then I can modify it to attach to tailpipe. It is a AC ball-bearing fan, please let me know if it would work...

Air Flow: 293.0 CFM (8.20m/min)
Static Pressure: 0.900 in H2O (224.2 Pa)

It has been sealed in a wood frame so should not be hard to attach a way to connect to tail pipe, would be thrilled to put it to use again after being boxed for over a year.

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Old 08-11-2018, 07:49 AM   #7
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Default Re: What Does Factory Exhaust System Look Like?

That will work and you do not need a tight connection at the tail pipe as a couple inches of water pressure will show the leaks.

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Old 08-11-2018, 08:16 AM   #8
laser3kw
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Default Re: What Does Factory Exhaust System Look Like?

mine broke right in front of the flex pipe.
the replacement choices are limited. Most everything out there is "steel". Shop around and try and fine a stainless down pipe and cat.

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Old 08-11-2018, 08:28 AM   #9
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Default Re: What Does Factory Exhaust System Look Like?

Quote:
Originally Posted by OldNuc View Post
That will work and you do not need a tight connection at the tail pipe as a couple inches of water pressure will show the leaks.
OP only has 0.9 of water pressure

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Old 08-11-2018, 05:33 PM   #10
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Default Re: What Does Factory Exhaust System Look Like?

That will work IF you use a bit of dish soap in the spray bottle and be observant for any trace of bubbles.

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Old 08-11-2018, 09:40 PM   #11
StrnWolf
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Default Re: What Does Factory Exhaust System Look Like?

Thank you all for your help! I am not able to do a leak test this month, so will have to do next. As soon as I do a test I will post the results, along with the mystery screw photo, but if I go under the car sooner I will be sure to take a photo of screw.

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