Rattle on Startup Issue
Thread Starter
Super Member
Joined: Nov 2014
Posts: 545
Likes: 230
From: Toronto & California
2015 ML400 4MATIC, 2016 C300 4MATIC, 2014 E350 4MATIC (Totaled), 2006 E350 (Sold)
Rattle on Startup Issue
Hi All,
At 190,000KM and am experiencing rattle on start up. I've bought the tensioners, and screws, but I've heard so many different answers as to how this can be remedied.
Option A:
Replace Tensioners only along with new Check Valves.
Option B:
Sprockets + Tensioners and Check Valve.
I've been told majority of the time it's just tensioners, but I've eheard so many conflicting things as to what it is.
https://youtube.com/video/tL82Dae8tbU/edit
At 190,000KM and am experiencing rattle on start up. I've bought the tensioners, and screws, but I've heard so many different answers as to how this can be remedied.
Option A:
Replace Tensioners only along with new Check Valves.
Option B:
Sprockets + Tensioners and Check Valve.
I've been told majority of the time it's just tensioners, but I've eheard so many conflicting things as to what it is.
https://youtube.com/video/tL82Dae8tbU/edit
Out Of Control!!
Joined: Apr 2019
Posts: 12,002
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Option A vs. B.... A then B:1,2,4
It won't hurt to start with conservative A only then progress with more comprehensive B.
At 200,000 km you're likely due for option B.
The question then is how many VVT gears :
At 200,000 km you're likely due for option B.
The question then is how many VVT gears :
- Passenger intake
- Both Intakes
- All four intakes + exhausts
Last edited by CaliBenzDriver; Sep 3, 2022 at 06:32 PM.
Super Member
Joined: Jun 2022
Posts: 739
Likes: 328
From: WA State, USA
2014 Cummins, 2014 E250 Bluetec
Dont have that engine but imho from reading how to do it replace as much as possible that ever requires it. Going in once vs going in couple of times is worth it if doing yourself. If paying may as well since most of cost is interference.
Out Of Control!!
Joined: Apr 2019
Posts: 12,002
Likes: 6,827
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
B is both fairly extensive and expensive. The HPFP, fuel rail and injectors need to be removed to access the two valve covers.
Then the VVT gear are around $700Ea. and pairs are best to keep engine balanced.
Passenger side intake only is a shortcut for profit not for better results.
Avoiding B if possible with A only is fair. The VVT freeplay can be tested during tensioner replacement.
Last edited by CaliBenzDriver; Sep 4, 2022 at 02:49 AM.
MBWorld Fanatic!
Joined: May 2018
Posts: 6,633
Likes: 6,575
From: Jakarta-Indonesia
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
4 x VVT phasor/sprocket
4 x VVT oil control valve
all these 8 components ..................... are not cheap.
Get someone to scope the Bank 1 and Bank 2 intake VVT/phasor and the crankshaft.
next
Bank 1 and Bank 2 exhaust VVT/phasor and the crankshaft.
While engine being crank to start.
The bad one will be shown on how the pulse wheel signal is jumping around as the phasor hits left and right limit without maintaining proper stable position.
The sound is coming from here, see the video below :
200K KM is already good. Them VVT are consumeable items, its just a long life one but consumeable nevertheless, same as intake/exhaust valves and piston rings and liners
4 x VVT oil control valve
all these 8 components ..................... are not cheap.
Get someone to scope the Bank 1 and Bank 2 intake VVT/phasor and the crankshaft.
next
Bank 1 and Bank 2 exhaust VVT/phasor and the crankshaft.
While engine being crank to start.
The bad one will be shown on how the pulse wheel signal is jumping around as the phasor hits left and right limit without maintaining proper stable position.
The sound is coming from here, see the video below :
200K KM is already good. Them VVT are consumeable items, its just a long life one but consumeable nevertheless, same as intake/exhaust valves and piston rings and liners
Last edited by S-Prihadi; Sep 4, 2022 at 03:16 AM. Reason: add info
