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Old 09-22-2024, 11:12 AM   #1
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Catalytic converter

Hello- new member here. I can do some basic mechanical work but am no master mechanic! New to me is a 2004 Boxster S 550 Spyder. Drives very nicely but has a bad rattle which Ive determined is likely coming from the Cats. Sounds like there are loose thin metal plates vibrating in both of them, If I thump them with my fist they reverberate. I was wondering what advice you folks might have. They are quite pricey from the main vendors. I saw this ad for Design Tek that was a lot less. What thoughts can you share?
Thanks!
Michael


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Old 09-22-2024, 01:01 PM   #2
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Are you sure it's from the cats? Could it possibly be the heat shields? They tend to rust a bit and rattle.
https://www.design911.com/p/exhaust-catalytic-converter-heat-sheild-porsche-boxster-986/
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Old 09-23-2024, 12:24 PM   #3
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Are you sure it's from the cats? Could it possibly be the heat shields? They tend to rust a bit and rattle.
https://www.design911.com/p/exhaust-catalytic-converter-heat-sheild-porsche-boxster-986/
Pretty sure, unless their not visible. I’ll look again though, and try to get above the cats etc.
Thanks
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Old 09-24-2024, 03:23 PM   #4
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Quote:
Originally Posted by fridsten View Post
Are you sure it's from the cats? Could it possibly be the heat shields? They tend to rust a bit and rattle.
https://www.design911.com/p/exhaust-catalytic-converter-heat-sheild-porsche-boxster-986/
I went back and poked around some more and you’re right! I don’t have the car on jacks so I its hard to reach but i found them. I had the car inspected before I purchased it and the mechanic noted the rattle but didnt know where it came from. So, how do you secure them. Anyone have a easy way to do it? Thanks again!
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Old 09-26-2024, 12:43 AM   #5
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Originally Posted by Ski7B View Post
I went back and poked around some more and you’re right! I don’t have the car on jacks so I its hard to reach but i found them. I had the car inspected before I purchased it and the mechanic noted the rattle but didnt know where it came from. So, how do you secure them. Anyone have a easy way to do it? Thanks again!
That's good news. They're a lot cheaper to replace. Otherwise you could just remove them. That seems to be a popular solution as well.
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Old 09-26-2024, 07:50 AM   #6
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I have seen people on the forum just use metal straps (the kind you screw to tighten). A nice easy fix.

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Originally Posted by Ski7B View Post
I went back and poked around some more and you’re right! I don’t have the car on jacks so I its hard to reach but i found them. I had the car inspected before I purchased it and the mechanic noted the rattle but didnt know where it came from. So, how do you secure them. Anyone have an easy way to do it? Thanks again!
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Old 09-28-2024, 09:16 AM   #7
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That's good news. They're a lot cheaper to replace. Otherwise you could just remove them. That seems to be a popular solution as well.
Thanks fridsten and Danimal. Appreciate the help!

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