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Old 08-25-2015, 07:21 PM   #1
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Internal exhaust issue

So after going to multiple shops and getting my car checked multiple times, there is some sort of internal exhaust issue causing a rattle at specific rpm. It is a very weird rattle that occurs frequently while the car is cold, but as it warms up it will sometimes go away. It's a pypes mid muffler dual exhaust, and the shop that installed it welded it shut. Any ideas on how to fix it other than blasting my radio constantly, because this rattle is audible to people outside my car and that bothers me. Since I paid a lot for the exhaust set up. Any advice would be nice.

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Old 08-27-2015, 07:37 AM   #2
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I have the same problem, does your exhaust have high flow cats? I've looked underneath my car while the rattle occurs and it's a heat shield or anything. My only guess is that it's gotta be the cats and must have crappy catalyst inside that's broken off and rattling around
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Old 08-27-2015, 11:47 AM   #3
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I have stock cats.

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Old 08-27-2015, 11:48 AM   #4
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I wonder if I could use a plumbing snake to go up the exhaust pipe and move stuff around, maybe get out the lose piece of whatever it is.

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Old 08-27-2015, 12:03 PM   #5
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So after going to multiple shops and getting my car checked multiple times, there is some sort of internal exhaust issue causing a rattle at specific rpm. It is a very weird rattle that occurs frequently while the car is cold, but as it warms up it will sometimes go away. It's a pypes mid muffler dual exhaust, and the shop that installed it welded it shut. Any ideas on how to fix it other than blasting my radio constantly, because this rattle is audible to people outside my car and that bothers me. Since I paid a lot for the exhaust set up. Any advice would be nice.
'

Van-Man - That's no good at all brother and I know what it's like! No pleasant at all especially when you're looking for it. Have you reached out to Pypes directly about this?

I've got a small hunch that there could be something loose internally within one of the mufflers.

I know it sounds childish but the next time you have a few minutes and the cars cold get under there with a hammer and tap away until you find where it's coming from.

Hope this helps.

Alex
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Old 08-27-2015, 12:14 PM   #6
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I think the most pypes will do is send me a new muffler, but it will still be a lot to cut and weld again. I do not have the tools to do it myself.

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Old 08-27-2015, 12:43 PM   #7
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Check the heat shields before anything else...I had a loose one. Pretty notorious on these cars for rattles


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Old 08-27-2015, 08:14 PM   #8
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It's not a heat shield. I have removed them and replaced them with thermal tape.

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Old 08-28-2015, 10:05 PM   #9
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Check the spacing on the rear mufflers. The hanging rods that hold the muffler up is probably to far forward. The engine heats up and the exhaust starts vibrating. The rod then starts tapping the frame of the car creating a rattling noise. I had a rattling that happened at random times. Started checking the muffler hanging rods and sure enough the one on the driver side was to close to the frame. After market exhaust system sticks out further back on the car, just the nature of the new exhaust. I had them shorten the rod and I haven't heard a sound ever since.

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Old 08-30-2015, 12:04 AM   #10
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Could you post pics of which rods you are talking about?

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Old 08-30-2015, 03:32 PM   #11
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Internal exhaust issue

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ID:	190344 The best shot I can get for now, it's the rob that runs from the muffler to hold it in place. If that rob is to close to the frame, it will tap against it. It will be really loud if you have a 93 race tune, because the exhaust will shake more. Your rattling may sound like it's coming from around the transmission, but it's just because there is little insulation around that spot.
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Old 08-30-2015, 07:40 PM   #12
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Really. That's exactly where it sounds like it's coming from! I will have to look at it.

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Old 08-30-2015, 07:42 PM   #13
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And that's right from the back of the car? I have the mid mufflers so mine are in front of the rear end.

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Old 08-30-2015, 07:49 PM   #14
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And that's right from the back of the car? I have the mid mufflers so mine are in front of the rear end.

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Really. That's exactly where it sounds like it's coming from! I will have to look at it.

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Yes it's right at the rear! It took me some time and researching to figure it out. Those rods will have to have a large amount cut off. Check both sides of the exhaust hanging rods, mine was to close to the driver side bumper. If you can't get it cut off soon, wrap it in duck tap. Wrap it around the end of the rod to act as a cushion, it should dime down the tapping noise. You'll have to explain it to the muffler shop and show them where it is.


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