Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.
metallic rattle at 3000 rpm
- Robin82
- Member
- Posts: 53
- Joined: Sun Nov 04, 2018 12:11 am
metallic rattle at 3000 rpm
A tinny, metallic vibration/clattering sound is coming from under the car at almost exactly 3000rpm. It only appears at this point and then disappears as the revs move on.
Any ideas what this could be??
First thought was heat shielding. Seems like something is attaining resonance at 3k.
Anyone experienced this before?
Any ideas what this could be??
First thought was heat shielding. Seems like something is attaining resonance at 3k.
Anyone experienced this before?
E85 2.0i 2007 Manual N46 Silver Grey
- mr.tourette
- Lifer
- Posts: 4294
- Joined: Thu Aug 27, 2015 9:16 am
- Location: north wales
metallic rattle at 3000 rpm
I had something similar recently, turned out it was the exhaust tips, adjusted the internal clip/spring mech and refitted it and fine ever since.. might be worth a look
if its got tits or tyres..its trouble
- patriot66
- Lifer
- Posts: 3478
- Joined: Sun Jan 11, 2015 2:59 am
- Location: Mawdesley, Lancashire
metallic rattle at 3000 rpm
Hi Robin82. What model do you have ? E85 or E86 ? What year and what engine ?
Sterling Grey '03 2.5i SE / Infinitas Supercharger / S.M.G / Hardtop / Gloss Black 162s / Bilstein B4s / 3.0i Brakes / DLV De-Cat & Silencer / Rebuilt VANOS / Sonar 2Xcite Lights / Carbon & Alcantara Trim / M-Sport Seats / ...& Side Covers !
- Robin82
- Member
- Posts: 53
- Joined: Sun Nov 04, 2018 12:11 am
metallic rattle at 3000 rpm
Hi there patriot, it’s an e85 2.0i 2007 and an N46 engine I believe.
Thanks, I’ll have a look. Easy to access by using a jack and stands?mr.tourette wrote: ↑Sat Oct 16, 2021 9:37 pm I had something similar recently, turned out it was the exhaust tips, adjusted the internal clip/spring mech and refitted it and fine ever since.. might be worth a look
E85 2.0i 2007 Manual N46 Silver Grey
- mr.tourette
- Lifer
- Posts: 4294
- Joined: Thu Aug 27, 2015 9:16 am
- Location: north wales
metallic rattle at 3000 rpm
Easy to access sat on the groundRobin82 wrote: ↑Sun Oct 17, 2021 10:55 pmHi there patriot, it’s an e85 2.0i 2007 and an N46 engine I believe.
Thanks, I’ll have a look. Easy to access by using a jack and stands?mr.tourette wrote: ↑Sat Oct 16, 2021 9:37 pm I had something similar recently, turned out it was the exhaust tips, adjusted the internal clip/spring mech and refitted it and fine ever since.. might be worth a look
if its got tits or tyres..its trouble
-
- Member
- Posts: 503
- Joined: Sun Feb 02, 2020 11:32 pm
metallic rattle at 3000 rpm
Also worth checking the rear exhaust hangers and heat shield are all intact.
The heat shield often corrodes around the fixings.
The heat shield often corrodes around the fixings.
2006 Z4 2.0i Ruby Black
-
- Member
- Posts: 197
- Joined: Wed Sep 18, 2019 12:30 pm
- Location: South West France
metallic rattle at 3000 rpm
I have the same on my e85 2.0. It sounds like a heat shield vibrating, I did mess around/bent one near the manifold a while back. I poked and bent it around but the noise it is still there although not as loud as it was. I need to have another look to try and stop it completely but haven't got round to it yet. It makes a kind of buzzing sound is the best way to describe it. Good luck finding your problem..
- Robin82
- Member
- Posts: 53
- Joined: Sun Nov 04, 2018 12:11 am
metallic rattle at 3000 rpm
Now that you mention this corrosion around fixings, it would make sense. The sound is just like metal vibrating back and forth at a fast rate.Jfgoldfish wrote: ↑Wed Oct 20, 2021 7:48 am Also worth checking the rear exhaust hangers and heat shield are all intact.
The heat shield often corrodes around the fixings.
I'm going to have a look this weekend weather pending. Being that I only hear it at a certain resonance, it would point towards something being loose.Andrew Sheldon wrote: ↑Wed Oct 20, 2021 7:57 am I have the same on my e85 2.0. It sounds like a heat shield vibrating, I did mess around/bent one near the manifold a while back. I poked and bent it around but the noise it is still there although not as loud as it was. I need to have another look to try and stop it completely but haven't got round to it yet. It makes a kind of buzzing sound is the best way to describe it. Good luck finding your problem..
E85 2.0i 2007 Manual N46 Silver Grey
-
- Member
- Posts: 498
- Joined: Tue Aug 13, 2019 1:54 pm
metallic rattle at 3000 rpm
I'd go for the thin metal plates behind the brakes. They create exactly that noise when on the way out. Crazy money from BMW for replacements.
- Robin82
- Member
- Posts: 53
- Joined: Sun Nov 04, 2018 12:11 am
metallic rattle at 3000 rpm
I was going to replace rear discs and brakes before xmas as they're about due. Which metal plate is this? Do you know the name of it?
E85 2.0i 2007 Manual N46 Silver Grey
-
- Lifer
- Posts: 3352
- Joined: Tue Sep 29, 2020 10:37 pm
- Location: North Hampshire
metallic rattle at 3000 rpm
They are just called protection plated front/rear, left/right.
Part numbers:
34116750129 and 30 (front)
34211158991 and 2 (rear)
Above for a 2.0. The fronts seem to be different across models, but the rears are the same.
Part numbers:
34116750129 and 30 (front)
34211158991 and 2 (rear)
Above for a 2.0. The fronts seem to be different across models, but the rears are the same.
2003 Maldives Blue 3.0i auto
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
- Benderloch
- Member
- Posts: 234
- Joined: Sat Nov 03, 2018 6:37 pm
- Location: Perthshire
metallic rattle at 3000 rpm
My front brake back plates both rattled so I discovered they had both corroded around the bolt holes, so I fitted some large washers that fixed them solidly in place.
The new once’s are expensive and unless your willing to cut them you have to remove the hubs to get them in position.
The new once’s are expensive and unless your willing to cut them you have to remove the hubs to get them in position.
E86 Silver Grey Red leather, Piano Black trim.
- Robin82
- Member
- Posts: 53
- Joined: Sun Nov 04, 2018 12:11 am
metallic rattle at 3000 rpm
Thanks Zedabee
I'm almost certain I've got an issue with one of these plates. I can hear a slight grinding too now when the windows down. It's the rear DS wheel I think, sounds like a right ***** to fit. Hopefully i'll be able to bolt a washer - if this is the issue. CheersBenderloch wrote: ↑Wed Oct 20, 2021 12:53 pm My front brake back plates both rattled so I discovered they had both corroded around the bolt holes, so I fitted some large washers that fixed them solidly in place.
The new once’s are expensive and unless your willing to cut them you have to remove the hubs to get them in position.
E85 2.0i 2007 Manual N46 Silver Grey
-
- Member
- Posts: 498
- Joined: Tue Aug 13, 2019 1:54 pm
metallic rattle at 3000 rpm
My BMW indy replaced them. Mucho cost - think they were £70 EA plus mucho labour to remove hubs and do it properly.
Then found out all we needed was washers.
Then found out all we needed was washers.
- Robin82
- Member
- Posts: 53
- Joined: Sun Nov 04, 2018 12:11 am
metallic rattle at 3000 rpm
UPDATE: Turns out it was the most trivial thing in the world.
The oil sump access panel. It was virtually hanging off. Looks as though it probably came loose and then I must’ve caught it somehow as one of the corners was bent, which I’m guessing made it even worse.
It was covered in oil too, although the sump screw was tight so perhaps the o-ring needs replacing. I also had a rocker/valve cover leak, perhaps that contributed if the oil was able to make it’s way down to the sump.
Re-the brake plates - they seem ok. The discs and pads desperately need replacing though, so perhaps thats the grinding I'm hearing.
Going to replace the access panel and screw and change the oil (again). Guess it wont harm as it is a N46 engine
The oil sump access panel. It was virtually hanging off. Looks as though it probably came loose and then I must’ve caught it somehow as one of the corners was bent, which I’m guessing made it even worse.
It was covered in oil too, although the sump screw was tight so perhaps the o-ring needs replacing. I also had a rocker/valve cover leak, perhaps that contributed if the oil was able to make it’s way down to the sump.
Re-the brake plates - they seem ok. The discs and pads desperately need replacing though, so perhaps thats the grinding I'm hearing.
Going to replace the access panel and screw and change the oil (again). Guess it wont harm as it is a N46 engine
E85 2.0i 2007 Manual N46 Silver Grey