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      10-22-2008, 12:27 PM   #1
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Metallic clinging noise at startup

Hey guys,

I have this noise, like metal clinging for about 3 seconds when I start the car.. I have the newest software by the way V30or 31 whatever the dealer had at the time when they replaced a fuel pump and insisted I needed a software update..

Is that noise the wastegate noise I keep hearing about or is this something else?

Last edited by Ramos; 06-23-2010 at 01:36 PM..
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      10-22-2008, 12:30 PM   #2
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rev it up to about 3-4k and while the revs are coming down listen for a metallic rattle noise. this would be wastegate.

p.s. the noise you MIGHT be hearing is just the injectors during cold start.
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      10-22-2008, 12:40 PM   #3
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WHy would the injectors make a metallic rattle sound?

Last edited by Ramos; 06-23-2010 at 01:36 PM..
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      10-22-2008, 12:42 PM   #4
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Quote:
Originally Posted by Ramos View Post
WHy would the injectors make a metallic rattle sound? Plus I live in San Diego and my car sleeps in a garage, so it never really sees a cold start..
Also I get this noise during warm starts too..
haha, it still has a cold start - cold start means the engine and all it's fluids aren't at optimal operating temperature yet. wrapping your car in a blanket wouldn't prevent that
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      10-22-2008, 12:48 PM   #5
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I understand that but I get this noise on warm starts as well.. Turn the car off for a few minutes, turn it back on and I still get that noise..

Anyone else have this issue?
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      10-22-2008, 01:01 PM   #6
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Quote:
Originally Posted by Ramos View Post
I understand that but I get this noise on warm starts as well.. Turn the car off for a few minutes, turn it back on and I still get that noise..

Anyone else have this issue?
I have the same noise, my car is a MT. It does not always do this and it does not do this when I rev the car. Therefore, not the wastegates on my car.

Does your car always make this noise on startup?
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      10-22-2008, 01:04 PM   #7
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Yes it has been lately.. It did not when it was newer.. (7500 miles now)
Any ideas on what this noise is?
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      10-22-2008, 01:05 PM   #8
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Quote:
Originally Posted by Ramos View Post
Hey guys,

I have this noise, like metal clinging for about 3 seconds when I start the car.. I have the newest software by the way V30 or 31 whatever the dealer had at the time when they replaced a fuel pump and insisted I needed a software update.. My car is MSD 80 but did come with V29.2 from the factory.. It is a March 08 production..

Is that noise the wastegate noise I keep hearing about or is this something else?
do you have stock downpipes and exhaust??
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      10-22-2008, 01:05 PM   #9
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Car is all stock

Last edited by Ramos; 06-21-2010 at 04:27 PM..
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      10-22-2008, 04:20 PM   #10
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its the exhaust flap. if you search "golf tee mod" you can get rid of it.
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      10-22-2008, 05:14 PM   #11
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Take it into the dealer. They will probably change our your muffler because the flap is defective. It may get worse... I had mine changed. It was consistantly ticking even after warmed up a month after i started hearing the noise.
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      10-22-2008, 05:15 PM   #12
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Quote:
Originally Posted by Ramos View Post
Car is all stock now..
did u ever have aftermarket downpipes and/ or exhaust??

if yes, i bet the noise started after the above instal(s).
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      10-22-2008, 06:46 PM   #13
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No, no never had an exhaust or down pipes
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      10-22-2008, 07:17 PM   #14
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It's the exhaust flapper. Mine does the same thing. I never thought much of it.
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      10-22-2008, 10:44 PM   #15
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it could be the direct injection, i get a very mechanical sound from the car even after being warmed up. you should youtube a video of a stock car and compare the sound with yours
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      04-20-2009, 03:13 PM   #16
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i just started noticing my car makes a clinging noise on first start up, haven't heard it any other time so far
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      10-29-2009, 05:02 PM   #17
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OP, any updates?

Had my software updated to the latest (v34), and ever since, I've noticed this metallic noise at startup as well. I have the performance exhaust so there is no flap. The sound appears to be coming from the front half of the car anyway. Downpipes are stock. ^ Like Sniz, car is MT, and this happens only once in a while and does not occur when revving.
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      10-29-2009, 07:45 PM   #18
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imho, if you ONLY have this noise during cold start in the morning i would not worry about it.
fwiw, many people with aftermarket dps (like me) have this metal rattle sound for first 4 seconds during start up in the morning. - that is the only time i hear it.
... i also have a slight wastegate ticking while idling - but i have minimal lag - so i donīt mind the noise too much at all.

my 2 cents
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      10-29-2009, 09:25 PM   #19
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Quote:
Originally Posted by midlife View Post
imho, if you ONLY have this noise during cold start in the morning i would not worry about it.
my 2 cents
Can't say it has happened only during a cold start in the morning. It has happened even after a short period of parking. In other words, the car would be driven and fully warmed up, parked for a little while, and upon starting the car again, that metallic noise would be there sometimes.
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      10-29-2009, 09:37 PM   #20
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if you are under warantee - they gotta fix it.
but since you have gotten this noise since the latest ecu update - that to me seems weird.
...who put in your performance exhaust ? if that is the culprit - then the install may not have been perfect - but difficult to say for sure.

sorry i cannot help too much
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      10-29-2009, 10:24 PM   #21
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^ Thanks for chiming in though. Was hoping to avoid the dealer.
The performance exhaust was installed a year ago by an experienced muffler shop, and this sound did not exist at all until the recent software update. The noise lasts for only a second and does not happen all the time, but it is indeed strange. It could be nothing, but maybe I should have it checked out.
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      04-04-2010, 04:27 PM   #22
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Quote:
Originally Posted by Nick.CBR View Post
Mine has a 3 second rattle - I thought it was loose waste gate actuators; never new the muffler flappers had issues though... I'm just going to wait till mine gets worse - only does it on a cold startup after sitting over night or at work all day. The car was on the dyno today and on decel I never heard anything out of the ordinary. I figure it's German, it's going to do weird things.

Nick
Quote:
Originally Posted by Bullitt View Post
^ Thanks for chiming in though. Was hoping to avoid the dealer.
The performance exhaust was installed a year ago by an experienced muffler shop, and this sound did not exist at all until the recent software update. The noise lasts for only a second and does not happen all the time, but it is indeed strange. It could be nothing, but maybe I should have it checked out.
Any updates from you guys?

I just had my aftermarket exhaust taken off and my stock one put back on. Been noticing a metal rattle sound only during cold starts. It goes away after I start driving. Was it indeed just the exhaust flap for you guys?
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