Hi I just noticed my car is making a weird noise
The CV joint on the left is soon to be broken, I’m bringing it in the shop tomorrow but I noticed my engine is making a weird noise what could it be ?
Mercedes B200 2010 Manual 2.0L i4
90.000 miles
no check engine light
Video : https://streamable.com/hbe0ld
Sounds to me like a vacuum leak - check the fuel trims to see if it’s anything major.
If it’s the intake manifold, and not just a line or a gasket - I’d try to find one used one.
What you saw in the video under the hood is pretty much only the air intake, the rest of the engine is much further away.
Link to a pic from the internet showing how the M266 is installed on these cars
The only other thing I hear is valve train noises that to me sound alright and a slightly uneven idle but that’s also within what I’d consider normal.
Hi Dan! Thanks for your comment I appreciate it, I may be paranoid but I feel like my valve train is louder than before, I may be wrong if it is, what could go wrong?
Thanks
Well I checked and on Mercedes Benz forums owners of this model say this is just the way it sounds
https://www.benzworld.org/threads/probably-engine-valve-rattling.2991773/post-17451359
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But just to be sure, the first thing you do when you're concerned about engine noises is check the oil.
But other then that, it's a SOHC with hydraulic tappets and no VVT - these kinds of noises are usually nothing to worry about.
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In general, if you want a really detailed tour, teardown and information on common faults:
(turn on the English subtitles)
https://youtu.be/jKgsN5OQUSs?t=48
Thanks Dan, really appreciate the help here. What a weird engine placement ahah
Yeah Mercedes had a thing for installing engines in a weird manner at the time, especially in small cars
(Pics from the internet of the Mercedes Smart and the Renault that they're now they're based on:)
