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      03-14-2017, 05:50 PM   #1
steertrak335i
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Coldstart wastegate rattle

Hi guys just wondered if anyone knows how to get rid of the wastegate rattle on coldstarts. Only lasts for 20 seconds and goes away with more revs or when warm . Can i adjust the wastegate actuator to solve this ?
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      03-14-2017, 11:26 PM   #2
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Just be happy you only have it on cold starts. Its pretty normal. I wouldn't go adjusting
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      03-15-2017, 12:06 AM   #3
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I have a rattle at idle, I took a look at my vacuum lines and noticed they're in bad shape. I'm pretty sure replacing my vacuum lines will get rid of the wg rattle.
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      03-15-2017, 07:58 AM   #4
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Quote:
Originally Posted by Sfvalley135i View Post
I have a rattle at idle, I took a look at my vacuum lines and noticed they're in bad shape. I'm pretty sure replacing my vacuum lines will get rid of the wg rattle.
no. if the vacuum lines were leaking you would have 0 or close to zero boost. the rattle is a physical issue at the actuator.
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      03-15-2017, 08:35 AM   #5
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Mhd has a cold start rattle fix. works great.
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      03-15-2017, 09:55 AM   #6
FCobra94
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Quote:
Originally Posted by steertrak335i View Post
Can i adjust the wastegate actuator to solve this ?
Only way to know is to try it...every car is different.
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      03-15-2017, 08:54 PM   #7
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Thats how it starts.
Soon it will be all the time.
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      03-16-2017, 10:37 AM   #8
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Isn't this the Can-flap not the wastegate?
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      03-16-2017, 11:15 AM   #9
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At 92,500 mi, my wastegate rattle has gotten so bad that it's starting to sound good
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      03-16-2017, 11:16 AM   #10
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Software update fix it 99%. After that I have no rattle. But little biger turbo lag.
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      03-16-2017, 11:27 AM   #11
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Quote:
Originally Posted by opjose View Post
Isn't this the Can-flap not the wastegate?
If you are talking about the exhaust flap... no. But it has a rattle too.

I use MHD to stop the wastegate rattle and I use zip ties back at the exhaust flap to snug everything down to keep it from rattling around (flap open of course).
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      03-16-2017, 12:18 PM   #12
MysticRob
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If they've never been adjusted you can definitely try it. The rattle could be from various causes like worn wastegate bushings, arms, and tabs, but if they're not too bad then adjusting the actuator arm can usually quiet it or eliminate it. Can't hurt to try. If they're too bad then rebuild them or send them out to be rebuilt.

You might also want to check for vacuum leaks and/or boost solenoid issues. Rattle could be one big thing or a lot of little things adding up. Minimizing as much as possible can only help, right?
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      03-16-2017, 03:39 PM   #13
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Quote:
Originally Posted by NoQuarter View Post
I use MHD to stop the wastegate rattle and I use zip ties back at the exhaust flap to snug everything down to keep it from rattling around (flap open of course).
I was talking about the OP's post.

He indicated that the sound seems to go away after 20 seconds which is pretty typical of the Can-Flap (exhaust/flap) control.

Wastegate rattles sound distinctly different.
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      03-16-2017, 04:02 PM   #14
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Quote:
Originally Posted by opjose View Post
I was talking about the OP's post.

He indicated that the sound seems to go away after 20 seconds which is pretty typical of the Can-Flap (exhaust/flap) control.

Wastegate rattles sound distinctly different.
Ah, is this the exhaust valve at the rear of the car that the golf tee mod fixes by leaving it open? That was the first mod I did so have never heard a rattle there. Didn't even know a rattle was possible back there.

OP, can you specify where the rattle is coming from?
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      03-16-2017, 05:18 PM   #15
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Quote:
Originally Posted by MysticRob View Post
Ah, is this the exhaust valve at the rear of the car that the golf tee mod fixes by leaving it open? That was the first mod I did so have never heard a rattle there. Didn't even know a rattle was possible back there.

OP, can you specify where the rattle is coming from?
Yes. And I've seen people claim that their car has a wastegate rattle (since it does sound like -A- rattle) when it is merely the CAN/Exhaust flap.
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      03-16-2017, 06:38 PM   #16
steertrak335i
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I thought it was the exhaust to start with but i held the wastgate actuator when i started it up and the rattle stopped . I also have the golf tee mod .
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      03-16-2017, 07:07 PM   #17
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Quote:
Originally Posted by steertrak335i View Post
I thought it was the exhaust to start with but i held the wastgate actuator when i started it up and the rattle stopped . I also have the golf tee mod .
That narrowed it down then.
I assume it's the rear turbo actuator then? If so, that's the easy one to adjust. I know there are some good youtube vids of the correct adjustment procedure, so let us know how it goes.
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      03-18-2017, 05:47 PM   #18
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Changing the actuator rod end and adjusting helps temporary. It will come back, but, you might buy yourself a fee months.
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