C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Timing cover leaking oil

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old May 4, 2024 | 02:00 PM
  #1  
maaza's Avatar
Thread Starter
Junior Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2014
Posts: 65
Likes: 4
C350
Timing cover leaking oil

Multi-point inspection detected timing cover leaking oil and recommended re-sealing, and replace cam magnets. I am planning to buy this for cam magnets repair, but not sure how to reseal timing cover. Any advice appreciated.
Reply
Old May 4, 2024 | 02:37 PM
  #2  
TimC300's Avatar
MBWorld Fanatic!
Community Builder
Liked
Loved
Community Favorite
 
Joined: Aug 2023
Posts: 3,745
Likes: 1,137
From: MA Coast
W204 2010 C300 4matic Sport M272
Can you see where the oil is leaking? And what makes them say to replace the cam magnets? Its not a very easy or inexpensive job so its why im asking.
Reply
Old May 4, 2024 | 04:27 PM
  #3  
maaza's Avatar
Thread Starter
Junior Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2014
Posts: 65
Likes: 4
C350

Timing cover oil leak
Not sure why they recommended cam magnets replacement.
Reply
Old May 4, 2024 | 08:31 PM
  #4  
TimC300's Avatar
MBWorld Fanatic!
Community Builder
Liked
Loved
Community Favorite
 
Joined: Aug 2023
Posts: 3,745
Likes: 1,137
From: MA Coast
W204 2010 C300 4matic Sport M272
If it were me I would thoroughly clean the area and monitor it for any oil leaking. I believe the timing covers are sealed with a sealant and dont think they really are known for leaking. You would see oil coming from around the timing covers.

And there are 4 cam adjusters, 2 on drivers and 2 on passenger side, id want to find out the reason they want to replace them all. If they are leaking oil they sell just the seals. You dont mention any check engine light or fault codes or engine not running properly.

On my M272 one of the camshaft position sensors was leaking oil so I simply replaced the o-ring and problem solved. Mine didnt look as dirty as in your photo but if i left it it probably would have been in time.

Does your drivers side look like that?

Would hate to see you spend time and money doing all that work if its only a leaking 92 cent o-ring.









Last edited by TimC300; May 4, 2024 at 08:35 PM.
Reply
Old May 4, 2024 | 08:58 PM
  #5  
maaza's Avatar
Thread Starter
Junior Member
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2014
Posts: 65
Likes: 4
C350
I don't have a check engine light or fault codes. But I do get the oil level low warning frequently. I lose about a quart of oil every month or so. So I do have a leak. Which sealant is used to seal the timing cover?
Reply
Old May 4, 2024 | 09:23 PM
  #6  
TimC300's Avatar
MBWorld Fanatic!
Community Builder
Liked
Loved
Community Favorite
 
Joined: Aug 2023
Posts: 3,745
Likes: 1,137
From: MA Coast
W204 2010 C300 4matic Sport M272
I have never done it so havent really looked into whats needed. Quick search comes up with this sealant:




I was thinking if your going to do the drivers side cover and remove the oil cooler you may want to remove the entire oil filter housing and replace that gasket while your in there. Instead of just the oil cooler gasket.
Reply
Old May 5, 2024 | 01:01 AM
  #7  
cvx5832's Avatar
Super Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2008
Posts: 765
Likes: 171
From: Walnut Creek, CA
325Ci, 325Cic, C300
I’m calling BS on the timing cover diagnosis. As pointed out clean it first and monitor. What does leak are the orings for the cam sensor, maybe the actuators, but the timing cover is a money grab.
Reply
Old May 5, 2024 | 03:16 PM
  #8  
Just204's Avatar
Super Member
 
Joined: Jun 2016
Posts: 562
Likes: 75
Mercedes w204 4matic sport
Originally Posted by maaza

Timing cover oil leak
Not sure why they recommended cam magnets replacement.
that’s seepage at most, if you were leaking 1L from there it’d be drenched. I wouldn’t worry much, replace the o-rings and clean it. Chances are if your losing 1L a month your probably burning it. Don’t fall for the timing cover reseal.
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

 Verdad Gallardo
story-1

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-2

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-3

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-4

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-5

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-6

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-7

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-8

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-9

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
Old Jan 27, 2026 | 01:05 AM
  #9  
J_SparkyAlfalfa's Avatar
Newbie
 
Joined: Jan 2026
Posts: 1
Likes: 0
From: Uk
Clk 350 v6 Sport
SIMILAR LEAK

Similar leak, front of the engine, Ive noticed drops of oil on my drive way, on the nearside of the car, (uk drivers side) cant seem to detector where the leak is originating from, its going down the alternator and some oil can be seen above the waterpump, tricking down towards the alternator. Ive checked the timing chain cover, ive actually had it resealed, the Camshaft actuators seem clean and no visible oil around it. Any ideas as to where the leak could be coming from? Any solutions.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 07:21 AM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE