OM642 CLS 350 Turbo Intake Gasket

MrGundam

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Just thought I would share the mess under my 102k OM642.

I have tried to clean up as much oil as I could. Hoping the new seals will stop this reoccurring.

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Charged air hose is all clean, so hopefully not too much oil being pushed to the engine.

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OneForTheRoad

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That turbo seal is a disgrace , wonder what caused those indents . Is the bat wing end ok or is it cracked/smashed ??
 
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MrGundam

MrGundam

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That turbo seal is a disgrace , wonder what caused those indents . Is the bat wing end ok or is it cracked/smashed ??
The batwing seems to be in good nick. I think the seal has just formed to the shape of the inside:

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Not sure how this would be avoided? Maybe the seal was never replaced and over time just too its shape.
 

OneForTheRoad

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Don't think it's been replaced judging by the oil mist that has leaked out. The batwing has changed since I owned a Cls on a 2008 plate, the end was flat .... Learning curve for me.
 

Larkone

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It could also be an issue with the PCV valve at that mileage - rubber diaphragm + heat + age = splits = excess oil vapour/mist at the turbo inlet.
 

m80

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Those seals leaking is a common enough issue.
It takes out the swirl motor beneath.

Be careful when replacing there have been 3 variants I believe. Upgraded seals don't always fit an earlier air duct and can split them if persuaded.
 

BlackC55

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Replace the engine breather too that sits on top of the N/S rocker cover.
 
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MrGundam

MrGundam

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Yes, Positive crankcase ventilation 'valve'
Ah sorry I was thrown by the N/S comment. On my C207 it is on the O/S (UK driver side).

I have ordered one already but thanks for the heads up.
 
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MrGundam

MrGundam

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So I took to old PCV off today ready for delivery of new one from MB.

I notice the old one has a little sealant dabbed on opposite ends. Is this required when replacing?

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Also cannot seem to find a min / max level for my coolant:

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W1ghty

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The min max in the coolant is that tower inside , I can’t remember if the level is the top of the white or top of the black part . The cars manual says which it is
 

m80

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The sealant is likely just a preference of the last installer.
It's what I used to add, a narrow bead around inner and outer of the rubber gasket, after a white spirit wipe of surfaces.
 

mbmb123

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S350 2012 W221
I didn't bother with sealant, just a little oil on the surface.
A 50k mile turbo seal doesn't look too good either.
 

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mbmb123

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S350 2012 W221
Just wondering. does you thermostat have an electrical connection?
Mine didn't, but the replacement thermostat has the connector but the car doesn't have a site to connect!
 

mbmb123

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Thanks
I'm taking off the airbox soon chasing a 14B100 hot air mass plausibility error.
I'll look for my missing thermostat wire again then.
 

mbmb123

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I've had a good look. Can't se any loose wires.
 

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