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C63 M156 ticking noise

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Old 02-23-2017, 10:44 AM   #1
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C63 M156 ticking noise

Hello guys,
im writting from Germany.

The Dealer said to me my "noise" is normal, but i think this is bull****.
(Other M156 are ways quieter).

My Problem:
I got a ticking/ tapping noise.
It follows the rpm.
I think it is also louder at higher oil temp. (but I can hear it at any oil temp.)

Some recording:


I replaced all head bolts and also all lifters.
The Cam Adjusters are locking, so i think they are not damaged (has already the last available partnumber).

Some guys told me that this problem could be the heads itself (oil supply to the lifters cracked or blocked).

Oil pressure is around 1,5 Bar at idle, and 4.5-4.8 Bar at 3000 rpm

Can anyone help?
Im not motivated, removing the heads again
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Old 02-23-2017, 02:32 PM   #2
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Thank you for the detailed post. Welcome to the forums.

Search.

It's normal.
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Old 02-23-2017, 03:38 PM   #3
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I searched.

But normally this should go after change of all lifters?
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Old 02-23-2017, 03:39 PM   #4
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Sounds like your fuel injectors to me. Mine sounds the same.
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Old 02-23-2017, 04:10 PM   #5
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Is your sound following the rpm?
Can also be heard from the left front wheel (when the hood is closed).

Also i noticed when i pushed the car at higher rpms the sound is quieter.
After a while on idle its getting loader again.
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Old 02-23-2017, 04:12 PM   #6
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Old 02-23-2017, 04:27 PM   #7
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This is the reason why im asking about the oil supply in the heads...


I will try to change the oil to 5W-40

At the moment im running with Mobile 1 0w-40
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Old 02-23-2017, 04:31 PM   #8
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Yes, injector pulse rate will increase with rpm.

Edit: Completely different vehicle, exact same noise.


Last edited by Jasonoff; 02-23-2017 at 04:37 PM.
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Old 02-23-2017, 04:46 PM   #9
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Very normal.
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Old 02-23-2017, 04:51 PM   #10
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Ok I will check the injection.

Sound is not normal!
Heard many other M156- they are all quieter and not following the rpm.
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Old 02-23-2017, 04:53 PM   #11
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My car sounds just like that, maybe the video isn't doing justice. It could be the cam adjusters if you say its a tapping noise.
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Old 02-23-2017, 04:58 PM   #12
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Here is a good example:

That is what my car is sound like


and this it how it should sound:

Ive checked the cam adjuster, they are all locking.
So i think there is no problem at this.
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Old 02-23-2017, 05:00 PM   #13
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Cam Adjuster:

My cams are all locked
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Old 02-23-2017, 05:17 PM   #14
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if that isn't a normal M156 sounding engine i dunno what is. mine has gotten louder with age, but always had the same sound. noticed it more after i installed the long tubes. haven't done head studs or lifters yet on my engine.

the only engines that i can think of that do not have that noise are ones that have manually adjusted rockers and their factory spec are really tight. i.e. Honda's

Last edited by hachiroku; 02-23-2017 at 05:20 PM.
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Old 02-23-2017, 05:29 PM   #15
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Maybe, but I think your Sound isn't following rpms.
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Old 02-23-2017, 05:36 PM   #16
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Quote:
Originally Posted by tompen2405 View Post
Here is a good example:

That is what my car is sound like

Vid1

and this it how it should sound:
Vid2

Ive checked the cam adjuster, they are all locking.
So i think there is no problem at this.
Your 2 videos sound like Vid2 to me which sound like the injectors ticking.
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Old 02-23-2017, 05:41 PM   #17
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a little bit off topic, but thought this was great info.

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Old 02-23-2017, 05:43 PM   #18
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Yes this vid is great.

I've looked with this information at my adjuster.
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Old 02-23-2017, 05:45 PM   #19
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Quote:
Originally Posted by Jasonoff View Post
Your 2 videos sound like Vid2 to me which sound like the injectors ticking.
Maybe its the Bad Sound quality.
But mine sound like the vid1
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Old 02-23-2017, 05:55 PM   #20
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Look at this:
Its a little bit louder than mine but exactly the sound.
Also from the left Frontwheel.

https://youtu.be/cwLiYgkBJTU
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Old 02-23-2017, 05:55 PM   #21
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Try Motul 5w40 with a bottle of liquid moly ceratec. Some people's cars seem to tick with the Mobil1 0w40 (mine did when very warm). No ticking with the Motul.
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Old 02-23-2017, 05:57 PM   #22
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Quote:
Originally Posted by tompen2405 View Post
Yes this vid is great.

I've looked with this information at my adjuster.
yeah...with such a simple design, i honestly have no idea how adjusters can go bad and why are there no rebuild kits out there. all it is is a precision machined alignment dowel pin, a spring, and i guess a plastic retainer.

shouldn't we be looking at why oil is leaking down and not holding pressure?

i could easily have the dowel pin and retainer made at any machine shop. maybe even upgrade the plastic retainer to a metal retainer.
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Old 02-23-2017, 05:59 PM   #23
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Quote:
Originally Posted by realjones88 View Post
Try Motul 5w40 with a bottle of liquid moly ceratec. Some people's cars seem to tick with the Mobil1 0w40 (mine did when very warm). No ticking with the Motul.
Should I use Motul or Liqui Moly?
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Old 02-23-2017, 06:08 PM   #24
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I use Motul 8100 5w-40 with LiquiMoly MoS2. If you plan to do so, run Ceratec first, then upon your next oil change add LiquiMoly MoS2. I'm sure LiquiMoly MoS2 could be added mid change interval, but I have not yet confirmed.

Engine runs like a top with that combo.
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Old 02-23-2017, 06:36 PM   #25
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Quote:
Originally Posted by tompen2405 View Post
Should I use Motul or Liqui Moly?
I would stick with the Motul 8100 because it is 229.5 approved (current MB recommendation) while I believe Motul is only 229.3 - not an oil expert here just going by what I've read from others.

Agreed to do a bottle of Ceratec with your first change to Motul and then LiquiMoly MoS2 thereafter.
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