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Old Mar 28, 2024 | 12:43 PM
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Porno Joe's Avatar
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2010 C300 4 matic
276 oil leak

was looking under the hood of the wife's wagon, had the engine cover off and noticed signs of an oil leak

snapped a quick pic. didnt have time to really look i was in a bit of a hurry:


it seems to be as high as up as the front of the valve cover- cam solenoid area.

did a quick search and those cam solenoids/front cover seem to be a very common leak area. any other common leak points i should be looking at?

I'm also thinking if I pull the covers to reseal, i must just replace the timing chain tensioners. car is a 2014 so has the updated ones already, however i did read several places on the forum where these can wear out. car has almost 160k miles on it so might be good preventative maintenance?
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Old Mar 28, 2024 | 05:29 PM
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W212 MY'14 M276-3.5NA @75kMi
Originally Posted by Porno Joe
was looking under the hood of the wife's wagon, had the engine cover off and noticed signs of an oil leak

snapped a quick pic. didnt have time to really look i was in a bit of a hurry:


it seems to be as high as up as the front of the valve cover- cam solenoid area.

did a quick search and those cam solenoids/front cover seem to be a very common leak area. any other common leak points i should be looking at?

I'm also thinking if I pull the covers to reseal, i must just replace the timing chain tensioners. car is a 2014 so has the updated ones already, however i did read several places on the forum where these can wear out. car has almost 160k miles on it so might be good preventative maintenance?
Yes, that makes complete sense to open the magnesium timing cover to reseal it properly.

The tensioners bearing-seal is short lived before it bleeds pump pressure to help cause startup rattle.

You can ignore the factory installed oil check-valves that are non-replaceable. They are fine.
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Old Mar 29, 2024 | 09:01 AM
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S212 E350 Estate
It's time timing covers. While you're at it, check your cam sensors at the top for seepage as well.
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