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Discussion Starter #1
I noticed some heat shield sounding clatter from under the car.
I took a quick look under and slapped around but nothing seems loose.
When I track this down, I will post a photo of the source.
I might need to have a helper start the car while I lay down outside so I can hear where its coming from
 

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You don’t mention when you hear the clatter but I’d start by looking at the butterfly valve at your exhaust.

That hose has a tendency to rot and will make a helluva clatter while at a stop light.


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BeeemerBro
5,4,6 BMW X3 All...196K +
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Yeah Econobox do that... The 04 has developed just what you say a type of "clatter". I can hear it only when I come out of a right hand turn. When I did get down there I saw felt nothing loose. Sounds to be around the front passenger wheel tho for me. My thoughts were that it was the dust shield. Of course I can't be down there when the car is coming out of a turn. Looking forward to seeing your findings.

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Discussion Starter #5 (Edited)
Brian, good call.

This was sitting on top of the exhaust pipes, totally detached.
Can't believe it did not fall off.
This was on top of the exhaust pipes, facing downwards.
On the bottom of the pipes is a plate with a hole through it, for the bolt.
The bolt seems to have snapped.

It is like this part on the E46





 

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Discussion Starter #6
I just bashed that broken bolt out and replaced just the bolt.
I will install it in the morning.
 

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Anti-Hack
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Lift’er up and check that their bolts aren’t sheered. The bolts that secure the block to the mounts are aluminum and a known failure point. I don’t remember if the mounts are themselves hydraulic, but check for fluid weeping or rotted rubber. The driver’s side is hidden above/behind the front differential and much more difficult to access. For $10, I replaced my bolts preventively a month ago at 168k; should’ve done it 10k ago when I had the subframe dropped.

The next question: does that bolt screw into a loose nut, or a welded nut? If the latter, you’ll need to extract the broken end.


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That piece is also aluminum. It bolts onto the bracket that mounts on the TC.


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That piece is also aluminum. It bolts onto the bracket that mounts on the TC.


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Good point. Zooming in on the end of the bolt I can see it isn’t as clean as the rest, but with it being a very low stress area, I’d still be concerned with the “why.”


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Discussion Starter #13
Bashed out the welded bolt,
and replaced it for $1.
Bolt, nut, and 2 washers

 

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Don’t worry with one or two heating and cooling cycles that bolt will be welded on there. If you ever have to remove it it’s gonna have to be broken off


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Discussion Starter #15
Don’t worry with one or two heating and cooling cycles that bolt will be welded on there. If you ever have to remove it it’s gonna have to be broken off


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Is that good or bad?
Should I change it?
To what?
 

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That's bad. If you break it off it will cost you another $1 to replace it.
I've got 300K miles on mine and have only had the pipes off once.
 
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