535d exhaust randomly goes loud
Its a 2004 535d sport. anything else you need?
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Joined: Apr 2007
Posts: 5,851
Likes: 5
From: Kajaani, Finland
My Ride: Bmw 530d 2004
Ok then it's definitely like in the picture.
If your car is missing that part, then the answer for the loud sound is clear: the previous owner has removed the DPF, but hasn't reprogrammed the car to forget all about the regeneration.
- Antti -
If your car is missing that part, then the answer for the loud sound is clear: the previous owner has removed the DPF, but hasn't reprogrammed the car to forget all about the regeneration.
- Antti -
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Joined: Nov 2010
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From: doncaster
My Ride: BMW 535d sport
vinyl rapped in matt black, hopefully a few more mods coming soon :)
all the box's that were between the big box at the front (the one on an angle going up to the turbo's) and the rear silencer have been removed by the previous owner. 
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Joined: Nov 2010
Posts: 21
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From: doncaster
My Ride: BMW 535d sport
vinyl rapped in matt black, hopefully a few more mods coming soon :)
sounds like that would be the problem! what is the big box at the front then? the one i keep describing that is going up to the turbo's?
Contributors
Joined: Apr 2007
Posts: 5,851
Likes: 5
From: Kajaani, Finland
My Ride: Bmw 530d 2004
Thread Starter
Members
Joined: Nov 2010
Posts: 21
Likes: 0
From: doncaster
My Ride: BMW 535d sport
vinyl rapped in matt black, hopefully a few more mods coming soon :)
yes that is it! thanks for all you help i needed it!
i will find someone to have a look at my ECU and get it turned off.
i will post on here again when its been done and let you know how i got on.
thanks again
craig
i needed it!i will find someone to have a look at my ECU and get it turned off.
i will post on here again when its been done and let you know how i got on.
thanks again
craig
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Joined: Jan 2009
Posts: 30
Likes: 0
From: Liège, Belgium
My Ride: '06 535D touring with M-Sport paket
Hi.
If your DPF hadn't ever gone through regeneration, it would have been clogged for a long time already. Some people say they can clearly hear the regeneration and some people say they can't hear it. The original poster says he has an aftermarket exhaust system, and that can make the sound louder.
I can hear it when my DPF is going through it. In my car it's a low humming sound when accelerating.
You can follow your engine temps in a "hidden menu". When the regeneration is on, the engine temps go up about 4-5 celsius degrees.
- Antti -
If your DPF hadn't ever gone through regeneration, it would have been clogged for a long time already. Some people say they can clearly hear the regeneration and some people say they can't hear it. The original poster says he has an aftermarket exhaust system, and that can make the sound louder.
I can hear it when my DPF is going through it. In my car it's a low humming sound when accelerating.
You can follow your engine temps in a "hidden menu". When the regeneration is on, the engine temps go up about 4-5 celsius degrees.
- Antti -
My 535d is a rocket. No diesel so far could stay behind my rear bumper. It achieves 255km/hr like a jet (246 on an external GPS).
On the other hand, I would like to point out that I drive quite "strongly"; the other night, when I came home, I opened the bonnet just after stopping to see the exhaust collector... it was dark red.
Contributors
Joined: Apr 2007
Posts: 5,851
Likes: 5
From: Kajaani, Finland
My Ride: Bmw 530d 2004
But if my DPF would be clogged, I guess I would have less power ?! should have I a warning lamp or message coming on the intruments ?
My 535d is a rocket. No diesel so far could stay behind my rear bumper. It achieves 255km/hr like a jet (246 on an external GPS).
On the other hand, I would like to point out that I drive quite "strongly"; the other night, when I came home, I opened the bonnet just after stopping to see the exhaust collector... it was dark red.
My 535d is a rocket. No diesel so far could stay behind my rear bumper. It achieves 255km/hr like a jet (246 on an external GPS).
On the other hand, I would like to point out that I drive quite "strongly"; the other night, when I came home, I opened the bonnet just after stopping to see the exhaust collector... it was dark red.
- Antti -
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