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Looking for advice, based in the UK, the rear main seal was replaced a couple of days ago by a reputable Mb specialist, checked car underneath today and it's still leaking
I'm trying to understand how it could still be leaking? Any advice would be appreciated
Does anyone have the official mb repair procedure for this job?
I read on another post different Mercedes model though that sealant should be added to the mount plate, would that apply to this vehicle?
W204 CGI petrol c250 saloon facelift blue efficiency
Last edited by ash1212002; Jul 23, 2022 at 03:56 PM.
what color is that puddle: engine oil... not ATF for sure, right?
The best thing about paying professionals for automobile repairs is parts & labor are guaranteed.
Engine rear leak could be from eay up high: the rear plastic camshaft seals that popped with high crankcase pressure (PCV!)
It's definitely the rear main as no signs of oil further up the vehicle, pic attached
I'm trying to understand what would have caused it to leak again?
Your leak looks very active, not just a casual drip.
What mileage is the engine?
61k the garage replaced the rear main seal a couple of days ago. I've probably driven 70 miles since and thought I'd check if it was dry and lo and behold it's still leaking!
It was an expensive repair, I can only presume they may have not fitted the seal correctly? Or may not not have used the sealant on the cover?
Would be good to see what the official mb repair procedure is for this job
W204 C200, BMW E30 M3, 1980Gt Mini, Toyota Corona, KTM 200 EXC.
Hi are you sure it is not coming from the oil cooler matrix gaskets and leaking on to the stater motor and down to the sump plug area and bell housing?
My C200K needed new seal kit installed in to the oil cooler matrix, after installing the new shaped O-ring seals it is now 100% no leaks.
I don’t think these cars see RMS issues often. 190k miles and bone dry for our 2008 M272. You sure it’s not the tranny input shaft? Or a leak somewhere else and being blown back?
I don’t think these cars see RMS issues often. 190k miles and bone dry for our 2008 M272. You sure it’s not the tranny input shaft? Or a leak somewhere else and being blown back?
this is the m271 turbo charged engine, petrol. There is no oil present anywhere else, it is specifically that area pictured
I’ve seen posts about the oil filter housing gasket leaking on the M271. It’s on the back of the engine, so if there is a possible leak that would transfer to the back side of the engine, that would be it. Barring that, the main seal is leaking again. In my experience, a reputable shop would stand by their work and make it right.
What’s your question here? The main reason the seals leak is due to the improper use of the sealant, which could mean curing time, or not replacing the seal and the plate together, as it is needed. Many years ago people thought they could replace just the seal but that is in fact not the case.
What’s your question here? The main reason the seals leak is due to the improper use of the sealant, which could mean curing time, or not replacing the seal and the plate together, as it is needed. Many years ago people thought they could replace just the seal but that is in fact not the case.
Yeah I get that, bur question is was it leaking again as it wasn't installed correctly? Or was it due to blocked PCV valve or something else actually leaking?
They gave me all sorts of excuses as to why it was leaking after the first replacement stating the crank maybe damaged etc trying to fob me off.
I watched so many YouTube videos, I highly suspect the issue was due them fitting the seal without the tool. If I remember correctly you need to use the MB sealant too.
This video explains how it should be done correctly
They gave me all sorts of excuses as to why it was leaking after the first replacement stating the crank maybe damaged etc trying to fob me off.
I watched so many YouTube videos, I highly suspect the issue was due them fitting the seal without the tool. If I remember correctly you need to use the MB sealant too.
This video explains how it should be done correctly
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