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1995 C220
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75 Posts
Discussion Starter #1
I've got a rattling noise coming from underneath my valve cover it sounds like. It don't happen all the time but happens when you rev the engine or are accelerating at certain rpms.
Any ideas what is going on?
 

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95" W124/ E220 MasterPiece and 01" W210/ E200 KOMPRESSER
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245 Posts
A worn inlet cam pulley.
When your engine reaches around 1600rpm, the inlet magnet will be activated and attract the inlet cam pulley to the front.
If you don't like to hear that sound, simply open your front cover and unplug the connector to the round magnetic device.
Your engine will run as a standard engine without VVT (variable valve timing) function.
 

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Registered
1995 C220
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75 Posts
Discussion Starter #3
A worn inlet cam pulley.
When your engine reaches around 1600rpm, the inlet magnet will be activated and attract the inlet cam pulley to the front.
If you don't like to hear that sound, simply open your front cover and unplug the connector to the round magnetic device.
Your engine will run as a standard engine without VVT (variable valve timing) function.
Okay, well so long as it's not a sound that meant my engine was coming apart I'm fine with it. I was just concerned, but it's made that noise since I purchased it over a year ago. Can the pulley easily be fixed or is it more trouble than it's worth?
 

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1999 C280, 2000 C280, 2000 C230K,2011 C300
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644 Posts
My son's 2000 C230K has that same noise right around 1500rpm on the way up and on the way down. I thought it might be the camshaft adjuster magnet but the noise was the same after changing it out.

Is the inlet cam pulley hard to change out?

Thanks,



Your Parts Search Returned 1 Part(s)
 

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Registered
1995 C280 (165K mi)
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1,540 Posts
Will it hurt the engine if you just leave it alone and drive with that sound like that?



A worn inlet cam pulley.
When your engine reaches around 1600rpm, the inlet magnet will be activated and attract the inlet cam pulley to the front.
If you don't like to hear that sound, simply open your front cover and unplug the connector to the round magnetic device.
Your engine will run as a standard engine without VVT (variable valve timing) function.
 

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Registered
'95 W202 C220, '00 W202 C230K
Joined
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19 Posts
I have the same noise on my C220. I asked a near by Mercedes specialist about this.

I am not entirely sure about this but... He says it's a worn out belt/pulley tensioner strut that you see slightly behind the belts and pulleys. I haven't fixed it yet myself but when I start the car and press down on that strut with a flat-head, the rattle does stop properly.

The part itself isn't more than $30-$35. There is even an install tutorial on YouTube

Please let me know if you do this job
 

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Registered
1995 C220
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75 Posts
Discussion Starter #7
I can verify that the belt tensioner is what is causing this noise. I noticed it a couple of months ago when I had the hood up and working on it with the car running. The plastic bushing in the top of the tensioner bolt hole is broken. When I find the money I will replace it.
 

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2 Posts
A worn inlet cam pulley.
When your engine reaches around 1600rpm, the inlet magnet will be activated and attract the inlet cam pulley to the front.
If you don't like to hear that sound, simply open your front cover and unplug the connector to the round magnetic device.
Your engine will run as a standard engine without VVT (variable valve timing) function.
No engine oil feeding to the cylinder head.
 
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