tompen2405

Hello guys,
i´m 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

INS1GNIA

Thank you for the detailed post. Welcome to the forums.

Search.

It's normal.

tompen2405

I searched.

But normally this should go after change of all lifters?

Jasonoff

Sounds like your fuel injectors to me. Mine sounds the same.

tompen2405

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.

INS1GNIA

Lol...

https://mbworld.org/forums/e-class-w...ing-noise.html
https://mbworld.org/forums/s-class-w...nder-hood.html
https://mbworld.org/forums/c63-amg-w...ng-engine.html
https://mbworld.org/forums/m-class-w...ing-noise.html
https://mbworld.org/forums/e-class-w...-start-up.html
https://mbworld.org/forums/e-class-w...ng-engine.html
https://mbworld.org/forums/c63-amg-w...ing-noise.html

Some have changed out their stuff 3 times even and the noise still persisted.

tompen2405

This is the reason why i´m asking about the oil supply in the heads...


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

At the moment i´m running with Mobile 1 0w-40

Jasonoff

Yes, injector pulse rate will increase with rpm.

Edit: Completely different vehicle, exact same noise.

Slow_c63

iTrader: (1)

Very normal.

tompen2405

Ok I will check the injection.

Sound is not normal!
Heard many other M156- they are all quieter and not following the rpm.

s.e.a.n.

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.

tompen2405

Here is a good example:

That is what my car is sound like


and this it how it should sound:

I´ve checked the cam adjuster, they are all locking.
So i think there is no problem at this.

tompen2405

Cam Adjuster:

My cams are all locked

hachiroku

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

tompen2405

Maybe, but I think your Sound isn't following rpms.

Jasonoff

Your 2 videos sound like Vid2 to me which sound like the injectors ticking.

hachiroku

a little bit off topic, but thought this was great info.

tompen2405

Yes this vid is great.

I've looked with this information at my adjuster.

tompen2405

Maybe its the Bad Sound quality.
But mine sound like the vid1

tompen2405

Look at this:
Its a little bit louder than mine but exactly the sound.
Also from the left Frontwheel.

https://youtu.be/cwLiYgkBJTU

realjones88

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.

hachiroku

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.

tompen2405

Should I use Motul or Liqui Moly?

hachiroku

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.

realjones88

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.