Odd noise, 57 coupe
- Thread starter shabba
- Start date
Thank heavens for forums like this 
. Just picked up my 07 3.0SiSE Coupe this weekend having exchanged it for my 2.2iSE roadster and just noticed this rattle today - I'm a bit paranoid about noises - who isn't - but a quick check on here tells me all is well and this is normal. Symptoms are exactly as described on the threads here so I'll not worry. After the 2.2 I am amazed by the performance - other cars really do just disappear in the rear view mirror.... :evil:
. Just picked up my 07 3.0SiSE Coupe this weekend having exchanged it for my 2.2iSE roadster and just noticed this rattle today - I'm a bit paranoid about noises - who isn't - but a quick check on here tells me all is well and this is normal. Symptoms are exactly as described on the threads here so I'll not worry. After the 2.2 I am amazed by the performance - other cars really do just disappear in the rear view mirror.... :evil:Mine does the same, but it's intermittent and always when warmed up. Because the severity of the noise varies so much with mine, i think there's something up (sometimes when it's warm, at idle, there's hardly any noise, other times, it's relatively loud...)
going to take it to the dealer at some point. please keep us updated with progress!
p.s. mine's a 57 and done 21k.
going to take it to the dealer at some point. please keep us updated with progress!
p.s. mine's a 57 and done 21k.
All my cars have done this anyway.
It's an un-loaded thrust bearing rattling around, and/or the input shaft of the gearbox rattling around when the engine is idling it around with the gear engaged.
Cars make noises. It's when yours is making ones no one else's does that you need to worry
It's an un-loaded thrust bearing rattling around, and/or the input shaft of the gearbox rattling around when the engine is idling it around with the gear engaged.
Cars make noises. It's when yours is making ones no one else's does that you need to worry
My poor thing is making all sorts of noises at the moment. It has two known problems (to be fixed tomorrow along with Inspection 1) but I think there is an exhaust vibration now also that is occuring when pulling away.
I don`t like warranties but I`m becoming a little more tempted to take out the warranty for one year seeing as I drive many miles and my car has had a few issues recently. It expires in September. I`ll see how well the car behaves between now and then and decide if I should extend the warranty for a year.
I don`t like warranties but I`m becoming a little more tempted to take out the warranty for one year seeing as I drive many miles and my car has had a few issues recently. It expires in September. I`ll see how well the car behaves between now and then and decide if I should extend the warranty for a year.
Pop it down today to my local dealer just so they could have a listen, told them what the symptoms are and said i believe this is a known problem with our cars from which he said this it the first he has heard of this. He said its best to get it booked in for a proper inspection but then said he will need it for 2/3 days, thats handy I said I need a bigger car and the end of this month so its book in and I have a loan car, saves me hiring a car. I will keep you posted
It's a known characteristic, not a known problem.
If a rattly thrust bearing or input shaft at idle in neutral is a problem, then every car in the world has this problem in some shape or form
All the descriptions of it thus far are basically describing that.
A rattly thrust bearing or input shaft might point to problems eventually, when very worn, but when they are characteristically noisy when in normal good working condition, then it is just that. Normal...
Basically I wouldn't worry!
BMW owners seem to suffer from hypochondria
Dave
If a rattly thrust bearing or input shaft at idle in neutral is a problem, then every car in the world has this problem in some shape or form
All the descriptions of it thus far are basically describing that.
A rattly thrust bearing or input shaft might point to problems eventually, when very worn, but when they are characteristically noisy when in normal good working condition, then it is just that. Normal...
Basically I wouldn't worry!
BMW owners seem to suffer from hypochondria
Dave
I get where you coming from dave but this it the first car that i have has which makes this kind of noise, sounds more like grinding then a rattle, I got a few miles on my z so it might be a little worse, better get it checked out while it still covered. My neighbor is a service tech for VW and he seems to think its not normal.
I'll have to record mine and see what others think.
Not saying it isn't something else, but all the things mentioned are perfectly reproducible in almost every car I have driven, and present.
So I'd say it's not when it's happening, but the distinct 'flavour' of the sound itself that might point to a problem. Ie, we need to know what thrust bearing/input shaft rattling noises are normal ones, and which are not
I'll kick things off tomorrow (maybe)
Not saying it isn't something else, but all the things mentioned are perfectly reproducible in almost every car I have driven, and present.
So I'd say it's not when it's happening, but the distinct 'flavour' of the sound itself that might point to a problem. Ie, we need to know what thrust bearing/input shaft rattling noises are normal ones, and which are not
I'll kick things off tomorrow (maybe)
sapphire_nick
Member
Mine has been at the dealership in Gloucester and the very helpful service manager there has been trying to get more info. BMW told him that there was nothing that could be done at the moment. Changing the clutch/gearbox etc will not make a difference.
I said I was concerned that the warranty was expiring in 2010 and he said not to worry as I had logged a concern early into the car's life. We will see - but if they come up with a fix, I seriously hope they will honour it out of warranty!
I said I was concerned that the warranty was expiring in 2010 and he said not to worry as I had logged a concern early into the car's life. We will see - but if they come up with a fix, I seriously hope they will honour it out of warranty!
Normal on ANY car if you listen for it. Different levels of loudness, but sitting about 1ft from the rear diff, and 1ft from the back of the gearbox means you do hear lots in the Z4. Great. I prefer hearing it than having 25kg of sound-proofing wrapped around the tranmission tunnel, and having less internal space!
I won't say it's not noticeable on the Z4, because it is. I was surprised how noisy it is.
BUT, it is just the nature of the beast. I think a fair degree of the input shaft rattle is probably down to the dual mass flywheel, which means there is no clutch friction plate springing, which means at idle where the torque is very low when idling, the dual clutch flywheel is probably relatively fairly stiff, and so simply rattles the gearbox input shaft around...
It's a common characteristic, especially as your clutch friction plate gets less and less sprung (paddle clutches, even sprung ones, do it a great deal!)
Ie:
http://www.mkivsupra.net/vbb/showthread.php?t=27304&page=1
http://www.youtube.com/watch?v=b_Vc7IXfdSg
http://www.madsci.org/posts/archives/2000-03/953176490.Eg.r.html
"Another set of springs is located in the hub of the clutch disc assembly.
These springs are part of a damper assembly that controls torque
pulsations in the drive train. These springs help prevent clutch chatter
and gear rattle. Clutch chatter (also called judder) is the low frequency
vibration that sometimes occurs in low gear and reverse gear during clutch
engagement."
The nature of the beast on a performance drive train. My last car it was noticeable on standard clutch bits, simply adding a lesser sprung friction plate (metallic), and it literally got about twice as noisy as a Z4 one is, from easily half as loud! It's just the thrust bearing and/or the gearbox input shaft at idle under as good as zero load clattering against the nearby components due to vibration.
Dave
BUT, it is just the nature of the beast. I think a fair degree of the input shaft rattle is probably down to the dual mass flywheel, which means there is no clutch friction plate springing, which means at idle where the torque is very low when idling, the dual clutch flywheel is probably relatively fairly stiff, and so simply rattles the gearbox input shaft around...
It's a common characteristic, especially as your clutch friction plate gets less and less sprung (paddle clutches, even sprung ones, do it a great deal!)
Ie:
http://www.mkivsupra.net/vbb/showthread.php?t=27304&page=1
http://www.youtube.com/watch?v=b_Vc7IXfdSg
http://www.madsci.org/posts/archives/2000-03/953176490.Eg.r.html
"Another set of springs is located in the hub of the clutch disc assembly.
These springs are part of a damper assembly that controls torque
pulsations in the drive train. These springs help prevent clutch chatter
and gear rattle. Clutch chatter (also called judder) is the low frequency
vibration that sometimes occurs in low gear and reverse gear during clutch
engagement."
The nature of the beast on a performance drive train. My last car it was noticeable on standard clutch bits, simply adding a lesser sprung friction plate (metallic), and it literally got about twice as noisy as a Z4 one is, from easily half as loud! It's just the thrust bearing and/or the gearbox input shaft at idle under as good as zero load clattering against the nearby components due to vibration.
Dave