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Discussion Starter · #1 ·
Hello all,

A little background first. I bought my Disco II in November and didn't have any issues off the bat. I slowly started to develop what sounded like the loose sleeve problem I've read about but it was off and on. In the last 2 months though the sound have kind of transformed dramatically, and now its more of a grinding, loose ball bearing, metallic sound that speeds up with the RPMs. Its especially noticeable in idle and dies away significantly with acceleration.

I've also noticed and you will hopefully be able to see and hear this from the video that you can hear the noise MUCH more if your down under the vehicle and quite muted if you're just up over the engine. Anyway here's the video.

Also just for reference I drive it maybe twice a week, so obviously I haven't put a lot of mileage on it. If you have any questions, please shoot. Thanks all.

EDIT: Updated with potential bad cat video. It may not be obvious from the video but the sound is definitely coming from inside.

https://www.youtube.com/watch?v=wsgz65feOpQ&list=UUS4Qx9GKvVfFRy10Lb0r6cw
https://www.youtube.com/watch?v=GVgaS8BEee0

On another note -

I don't have any means to weld anything so just getting a replacement cat would involve a shop visit. I would also want to just knock out the other one as well as replace all the O2s because of my OCD.

Would just getting a new Magnaflow Y-Pipe and replacing it with that be something I could do myself without any special tools? I've done plenty of vehicle work on this and other cars, just never any welding jobs. I also haven't had a chance to get back under the vehicle to see what it would involve.
 

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Cat failure is common and do rattle, any engine light (o2 codes) replacing is fairly straight forward and is a bolt on, you will need to remove the cross brace on the frame and may need to un seize some hardware with a torch but no welding
 

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Commonly when the cat fails, the vehicle will set o2 sensor codes. I suppose It is possible that the catalyst could be loose and rattling but still working
 
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