[AlonBabaev]

Hello all, I have a 2020 X3m and I did a secondary cat and resonator delete. It was all fine and sounded amazing until now. It has a very very loud rasp and vibration sound. From like 1-2k rpm it'll have it and then if I hit the gas and let go at like 5-7 rpm it's insanely raspy and I feel like it has a vibration tone to it. Even when I start it now, cold start it has that sound. Can anyone tell me what's going on and what I can do to fix this, thank you!

[Parnishka]

Originally Posted by AlonBabaev

Hello all, I have a 2020 X3m and I did a secondary cat and resonator delete. It was all fine and sounded amazing until now. It has a very very loud rasp and vibration sound. From like 1-2k rpm it'll have it and then if I hit the gas and let go at like 5-7 rpm it's insanely raspy and I feel like it has a vibration tone to it. Even when I start it now, cold start it has that sound. Can anyone tell me what's going on and what I can do to fix this, thank you!

looks like exhaust valve is rattling. it should be some post regarding this and it is some repair kit should be for sale.

[AlonBabaev]

Originally Posted by Parnishka

looks like exhaust valve is rattling. it should be some post regarding this and it is some repair kit should be for sale.

It will make that much noise ? If the exhaust valve is damaged.

[forza1976]

Originally Posted by AlonBabaev

Hello all, I have a 2020 X3m and I did a secondary cat and resonator delete. It was all fine and sounded amazing until now. It has a very very loud rasp and vibration sound. From like 1-2k rpm it'll have it and then if I hit the gas and let go at like 5-7 rpm it's insanely raspy and I feel like it has a vibration tone to it. Even when I start it now, cold start it has that sound. Can anyone tell me what's going on and what I can do to fix this, thank you!

Lol. Really? What can you do to fix it? Reinstall the cats and resonator... Duh

[AlonBabaev]

Originally Posted by forza1976

Lol. Really? What can you do to fix it? Reinstall the cats and resonator... Duh

Didn't happen after I did it. Happened about a month and a half after.

[forza1976]

Originally Posted by AlonBabaev

Didn't happen after I did it. Happened about a month and a half after.

I stand my my suggestion. Comedy.

[tnd720]

Forgive my ignorance of the current bmw car scene, but why did you do a cat delete and a resonator delete on an x3m?

The car sounds great as is, this almost reminds me of when the n54 became cheap enough that civic owners started buying them up and clapping them out. Sorry.

[AlonBabaev]

Originally Posted by tnd720

Forgive my ignorance of the current bmw car scene, but why did you do a cat delete and a resonator delete on an x3m?

The car sounds great as is, this almost reminds me of when the n54 became cheap enough that civic owners started buying them up and clapping them out. Sorry.

Lol I did it because it was just to quiet for me. Just self preference and I love how it sounds.

[AlexFL]

Originally Posted by tnd720

Forgive my ignorance of the current bmw car scene, but why did you do a cat delete and a resonator delete on an x3m?

The car sounds great as is, this almost reminds me of when the n54 became cheap enough that civic owners started buying them up and clapping them out. Sorry.

because it adds power and increases the sound volume.

[forza1976]

"Unlocks" power that is already there. A tune "adds" power ;-)

[AlexFL]

Originally Posted by forza1976

"Unlocks" power that is already there. A tune "adds" power ;-)

it adds power at the wheels (whp), so I was correct

[forza1976]

Originally Posted by AlexFL

it adds power the wheels (whp), so I was correct

Partially. Hahahahaha.

[AlexFL]

Originally Posted by AlonBabaev

Didn't happen after I did it. Happened about a month and a half after.

Alon, did you pull out the ASD?

[Parnishka]

Originally Posted by AlonBabaev

It will make that much noise ? If the exhaust valve is damaged.

post the video here otherwise its just a guess.

[AlonBabaev]

Originally Posted by AlexFL

Alon, did you pull out the ASD?

Nope I haven't

[sneesh]

could you post a video of how it sounds I have the non comp and honestly I don't think its loud enough and i might do what you did and also its just guess if you don't show us what the rattling sounds like

[AlonBabaev]

Originally Posted by sneesh

could you post a video of how it sounds I have the non comp and honestly I don't think its loud enough and i might do what you did and also its just guess if you don't show us what the rattling sounds like

[sneesh]

Originally Posted by AlonBabaev

it might be either the muffler or the valves but if it happened like a month after it could be a broken weld or it might be something goofy in the muffler or it could be the valves cause when i cold start it i get the same rattling noise as yours does

so yeah those are the three main things i'd check for idk how you could check for it it you could probably bring it to a shop or a dealer but idk if they'll take a look at it

all in all sounds great do you have the non comp as well? i should be getting that done after break in which is like a week from now i'll come back and let you know if mines the same

[AlonBabaev]

Originally Posted by sneesh

it might be either the muffler or the valves but if it happened like a month after it could be a broken weld or it might be something goofy in the muffler or it could be the valves cause when i cold start it i get the same rattling noise as yours does

so yeah those are the three main things i'd check for idk how you could check for it it you could probably bring it to a shop or a dealer but idk if they'll take a look at it

all in all sounds great do you have the non comp as well? i should be getting that done after break in which is like a week from now i'll come back and let you know if mines the same

I have a non comp and it sounds killer. It's perfect. Just this problem is the really upsetting thing. Ive reached out to many people and they said there's either a leak or it's your valve that's been broken. I called my service advisor and he said to get the welding checked on and make sure there isn't any leaks, and if that's not the issue then he said to bring the car in so his mechanics can look at it

[hxr]

Mine used to sound like that. Was like a giant wasp SO Embarassing driving at full throttle with that rasp.
Had decatted downpipes, secondary decat and opf delete, res and backbox mod.

I did the custom single mid pipe mod but kept the resonator and this completely eliminated my rasp. Fell in love with the car again

https://x3.xbimmers.com/forums/showthread.php?t=1775575

[AlexFL]

Originally Posted by AlonBabaev

I have a non comp and it sounds killer. It's perfect. Just this problem is the really upsetting thing. Ive reached out to many people and they said there's either a leak or it's your valve that's been broken. I called my service advisor and he said to get the welding checked on and make sure there isn't any leaks, and if that's not the issue then he said to bring the car in so his mechanics can look at it

You have the stock downpipes, right?

[AlonBabaev]

Originally Posted by AlexFL

You have the stock downpipes, right?

Yes I do. Primary cats are stock and secondary cats are deleted.