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I'm being a little lazy here as I did not read the whole thread. Changed my oil yesterday using a youtuber for guidance - I checked the RMS as he advised and I had a very light amount of oil residue where he said to look. Everything I have read so far says this is more common on 18-20s with around 50k miles and you definitely know you have an issue due to oil drips on the floor. I have a 21 with 5k miles and have no drips on the floor, just this light residue. I'm taking the car to a mountain home that is 3-4 hours from the closest MB dealer, so, if needed, I'd prefer to get the issue fixed under warranty and while I'm nearby numerous dealers. Do y'all see anything alarming here?
I'm being a little lazy here as I did not read the whole thread. Changed my oil yesterday using a youtuber for guidance - I checked the RMS as he advised and I had a very light amount of oil residue where he said to look. Everything I have read so far says this is more common on 18-20s with around 50k miles and you definitely know you have an issue due to oil drips on the floor. I have a 21 with 5k miles and have no drips on the floor, just this light residue. I'm taking the car to a mountain home that is 3-4 hours from the closest MB dealer, so, if needed, I'd prefer to get the issue fixed under warranty and while I'm nearby numerous dealers. Do y'all see anything alarming here?
Adding another 2019 E63s with 13,754 miles to the mix. No RMS oil leak (bone dry).
Just recently installed the E63 motorsports dual catch can in hopes of preventing any RMS leaks in the future. Time will tell.
Does anyone know if the majority of RMS failures are due to excessive positive crankcase pressure or negative (vaccuum) pressure.
I recently measured my crankcase vaccuum at warm idle of ~16 in of water (~1 in of Hg) which from what I have researched is within normal engine parameters. Curious if anyone has seen or measured or is aware of RMS failure due to excessive crankcase negative (vaccuum) pressure. If so, what values would be considered excessive and be at risk sucking in oil seals vs pushing them out.
Do you mean -1” Hg? That is fairly mild vacuum.
-5” Hg is normal on the current gen EA839 2.9TT Porsche engine. Quite high crankcase vacuum at idle measured at the oil fill cap. The fill cap is sucked onto the fitting and idle speed at idle speed is unstable with the fill cap removed while the engine is running.
The entire crankcase ventilation situation with modern engines is not figured out yet by car companies.
Current gen German engine oil-vapor separators have a more sophisticated operating principle than in the past but, as usual, the car companies are tying to solve a NASA-level problem using $0.79 parts. The result is failed rear main seals on $180k AMGs because of the use of crummy cheap oil-vapor separators.
Wondering if all RMS failure appear like the picture shown in "the leaky seal". That picture seems to show the seal being sucked in (towards the motor) and
not pushed out given the theory that clogged oil separators cause RMS to blow out.
-5” Hg is normal on the current gen EA839 2.9TT Porsche engine. Quite high crankcase vacuum at idle measured at the oil fill cap. The fill cap is sucked onto the fitting and idle speed at idle speed is unstable with the fill cap removed while the engine is running.
The entire crankcase ventilation situation with modern engines is not figured out yet by car companies.
Current gen German engine oil-vapor separators have a more sophisticated operating principle than in the past but, as usual, the car companies are tying to solve a NASA-level problem using $0.79 parts. The result is failed rear main seals on $180k AMGs because of the use of crummy cheap oil-vapor separators.
I measured ~16 inches of water which convert to ~ 1 in of Hg. Curious to see pictures of failed RMS to see if they are indeed
blown out (away from the engine side) or sucked in (towards the engine side). I saw one picture "the leaky seal" that appeared to
show a sucked in RMS.
I'm looking at a 2018 with 50k miles and freshly repaired RMS from the dealership, would I be good for another 4 years and 40k miles down the road? Does dealership usually "warranty" repairs on these type of jobs?
I'm looking at a 2018 with 50k miles and freshly repaired RMS from the dealership, would I be good for another 4 years and 40k miles down the road? Does dealership usually "warranty" repairs on these type of jobs?
Did they replace the oil separators? If not, the new seal will fail prematurely. Since replacing the separators doubles the cost of the repair, some owners/dealers, anticipating selling the car, will just replace the seal. You need to see proof that the separators were replaced with the updated parts.
Did they replace the oil separators? If not, the new seal will fail prematurely. Since replacing the separators doubles the cost of the repair, some owners/dealers, anticipating selling the car, will just replace the seal. You need to see proof that the separators were replaced with the updated parts.
yes the oil separators are replaced, part number 87-12 and 88-12. The repair was all bill to dealer not the previous owner.
For those who have fixed the seal with out oil separators how long until it leaks again? Dealer denied the separators under CPO warranty and it ends on oct 5th
For those who have fixed the seal with out oil separators how long until it leaks again? Dealer denied the separators under CPO warranty and it ends on oct 5th
I have yet to read about someone with this circumstance reporting a repeat RMS leak, doesn't me it won't happen but it's unclear the timeline that you're asking for as you stare down the end of your warranty ... you should consider an extended warranty (post 44 in following link)
Is it normal that the oil separators are not covered under the warranty but the RMS is? Is changing the separators that much more work when you’ve already got the motor disassembled? I’d probably just pay out of pocket and get that done too. At least that’s my plan when I eventually find myself in this circumstance.
Is it normal that the oil separators are not covered under the warranty but the RMS is? Is changing the separators that much more work when you’ve already got the motor disassembled? I’d probably just pay out of pocket and get that done too. At least that’s my plan when I eventually find myself in this circumstance.
this is a relatively evolving issue and there is nothing standardized about how dealers are addressing it based on the myriad of posts on this forum
Agree with @PeterUbers . The general summary of posts on this site is that RMS failure is usually covered under manufacturer's warranty, and might be covered under a third party warranty. OVS failure seems to be mostly not covered. Sad, because OVS failure is the root cause of RMS failure.
OVS replacement would be "easy" if the engine is removed. I don't believe engine-out is required for RMS replacement.
OVS location at the front of a V8 engine generally means difficult access relative to radiator and intercoolers. DIY-able but time consuming. OVS parts are relatively cheap in the big picture, the cost for this job is related to the time for disassembly and reassembly of the many parts in a tight space.
Is it normal that the oil separators are not covered under the warranty but the RMS is? Is changing the separators that much more work when you’ve already got the motor disassembled? I’d probably just pay out of pocket and get that done too. At least that’s my plan when I eventually find myself in this circumstance.
Dealer replaced separators and seal under extended warranty for me. No questions asked. "SA: Of course we have to install new separators since they're the cause of the problem."
Dealer replaced separators and seal under extended warranty for me. No questions asked. "SA: Of course we have to install new separators since they're the cause of the problem."
Dealer replaced separators and seal under extended warranty for me. No questions asked. "SA: Of course we have to install new separators since they're the cause of the problem."
I really hope my local dealer is on board with that. I just dropped my 2018 off at an independent service company as it started leaking oil. They're going to take a look and see what's up with it. If it is the RMS, then off to the dealer (still have 6 months on the extended warranty). It would be nice to have the separators covered too.
Yes, it's the RMS. Independent quoted ~$2-3K to repair (not including the separators). I'm dropping it off at the dealer on Thursday.
good price. Not exactly sure how it compares to separators, but that’s cheapest RMS I think I’ve seen in here. (dealer I bought car from did RMS for free)
Dealer stated the RMS and one of the separators were leaking. All covered under the extended warranty and they'll be replacing both separators. I'm at about 38K miles. I'll report back when they're done.
Dealer stated the RMS and one of the separators were leaking. All covered under the extended warranty and they'll be replacing both separators. I'm at about 38K miles. I'll report back when they're done.
when you ask the tech if this could happen again - what do they say?
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