CLK500 Mystery Oil Leak - Video - Help Requested

Nov 4, 2020 | 08:42 AM

300SE1993

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2012 S350 Bluetec, 2014 GLK250 Bluetec, 2026 E350 4Matic

CLK500 Mystery Oil Leak - Video - Help Requested

I posted this video showing what's going on in hopes that someone will know where the oil is coming from and can give me some advice. Thanks in advance for any feedback.

Nov 4, 2020 | 07:13 PM

Fatz

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From: Atlanta Metro

2008 clk550 - Navigator - Frontier

The one mystery oil leak I had was due to the air/oil separator. In that case the oil would pool on top of the intake manifold and run down the backside of the engine.
The other oil leak was not so much a mystery and was at the oil cooler. It was cracked.

Nov 4, 2020 | 07:58 PM

300SE1993

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2012 S350 Bluetec, 2014 GLK250 Bluetec, 2026 E350 4Matic

Quote:

Originally Posted by Fatz

Thanks for your reply. The engine in my CLK500 doesn't appear to have the air/oil separator like my 2011 E350 did. I had that issue with my E350 so I know exactly what you're talking about. I checked all round the front of the engine but don't see anything.

I am wondering if it's just a lot of stubborn resuidual oil. I can't really believe how complicated this is.

Nov 4, 2020 | 10:55 PM

2MCHCAR

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Supercharged CLK500,ML500,S580

In your video you mentioned you recently replaced your valve cover gaskets, did you use Mercedes gaskets? When I had my gaskets replaced, I replaced mine with the Victor Reinz gaskets and they leaked. I bought genuine MBZ's for about $20 more and compared them side by side - the MBZ gaskets were easily 50% thicker. No problems since that.

Nov 5, 2020 | 05:04 AM

300SE1993

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2012 S350 Bluetec, 2014 GLK250 Bluetec, 2026 E350 4Matic

Quote:

Originally Posted by 2MCHCAR

I ran into that problem as well. I ended up doing the job multiple times because of that. In the end, I bought a brand new genuine valve cover assembly and gasket which definitely cured the leak from the valve cover. I thought that it might have been a combination of inferior gasket and maybe the old valve vover was distorted or cracked.

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