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Hello, everyone. I changed the engine air filter on my 2015 GLK 350 4matic, and I noticed oil on the air filter and the case.
The lower filter part was wet in oil, and the filter case had oil on the corner of the case. I had to dry the oil with a towel.
Any thoughts on what could be the problem? How much would it cost to fix it, or is it something simple that I can do myself?
Not good, maybe a clogged PVC from lack of oil changes , How many miles ? Open hood, start motor and remove the oil filter cap and put down, there should be almost No suction. Big suction indicated the PVC seal has failed and it need replacing now . American car manufacturers used to have this as a 5$ 30 second job to replace the PVC. Your MB folks made it a 5-700$ job! The part is maybe 100$, in the back of the motor and a lot of stuff on top has to be removed . Labor about 5 hours. I just had it done. But do a Vacuum test first. Or it’s a different issue which still sounds expensive .
Thanks for your reply, I dropped off the car at the mechanic this morning and I will know the problem later today.
the mechanic mentioned that it could be the pcv valve and the replacement was not too expensive.
this is what chat got said about this problem.
PCV (Positive Crankcase Ventilation) System Issue:
The PCV system is designed to recirculate gases from the crankcase back into the intake manifold to be burned off during combustion. If there’s a problem with this system, it can cause oil to be pushed into the air intake, leading to oil on the air filter.
Overfilled Engine Oil:
If the engine oil is overfilled, it can cause excess oil to be pushed through the breather system and end up on the air filter.
Clogged or Dirty Air Filter:
A clogged or dirty air filter can cause a vacuum to form, pulling oil from the crankcase ventilation system into the intake system.
Worn Piston Rings or Valve Guides:
If the piston rings or valve guides are worn, it can cause oil to blow by into the intake system, leading to oil on the air filter.
Oil Separator Issue:
Some engines have an oil separator that helps to remove oil from the air before it enters the intake. If this separator is malfunctioning, it can allow oil to reach the air filter.
Here’s what you can do:
Check the PCV Valve: Make sure the PCV valve is functioning correctly. If it’s stuck or clogged, it may need to be replaced.
Inspect Oil Levels: Ensure that the engine oil level is not overfilled. Correct any overfilling by draining the excess oil.
Replace the Air Filter: If the air filter is dirty or clogged, replace it with a new one.
Examine for Other Signs of Wear: If you suspect worn piston rings or valve guides, it may require a more in-depth inspection by a professional mechanic.
QUOTE=Mmr1;8998154]Not good, maybe a clogged PVC from lack of oil changes , How many miles ? Open hood, start motor and remove the oil filter cap and put down, there should be almost No suction. Big suction indicated the PVC seal has failed and it need replacing now . American car manufacturers used to have this as a 5$ 30 second job to replace the PVC. Your MB folks made it a 5-700$ job! The part is maybe 100$, in the back of the motor and a lot of stuff on top has to be removed . Labor about 5 hours. I just had it done. But do a Vacuum test first. Or it’s a different issue which still sounds expensive .[/QUOTE]
Not good, maybe a clogged PVC from lack of oil changes , How many miles ? Open hood, start motor and remove the oil filter cap and put down, there should be almost No suction. Big suction indicated the PVC seal has failed and it need replacing now . American car manufacturers used to have this as a 5$ 30 second job to replace the PVC. Your MB folks made it a 5-700$ job! The part is maybe 100$, in the back of the motor and a lot of stuff on top has to be removed . Labor about 5 hours. I just had it done. But do a Vacuum test first. Or it’s a different issue which still sounds expensive .
Thank guys.I brought the car to the mechanic this morning. The mechanic is about a mile from where I live, and he has never worked on my cars. He is changing the brake, transmission, transfer case, and differential fluids. He said it would check the filter oil leak problem.
I also called a reputable mechanic in my area, but the shop is about 20 miles from me. He has done some work on my previous, and he is straightforward and honest.
This is how the conversation went.
I'm calling to see how much it would cost to replace the Positive Crankcase Ventilation System. When I replaced the engine air filter yesterday, I found oil on the air filter.
He said, " Wait a minute, to whom are you talking?
I hesitated and said the research I have done online forums. I was lucky that I did not mention chat GPT
Haha, that is why.... don't worry about it...
Me: there is oil on the air filter.
Mechanic, does the car have the engine light on? Does it have any running problems?
Me: No, the car is running smoothly. It's new, and there are no problems at all.
Mechanic: so, don't worry about it...
Coversation end!
---------
I also went to the Mercedes declare, which is about half of mile from here. ( yes, I live in the center of town) The first mechanic told me there was a recall on the I was informed by the Mercedes dealer that the 2014 C300 and some ML cars were covered under warranty for the Positive Crankcase Ventilation System issue, but the GLK was not covered. The dealer also mentioned that for the 2014 C300 to be covered, the engine light needed to be on, and there is a shortage of Positive Crankcase Ventilation System parts.
Ask him what the total procedure is for Brake Fluid , see if he tells you he has to activate the ABS module open so it flushes also. That ABS replacement is like 1200$ !!
The last time I paid for a brake flush, a few months later I had it on a different lift and saw my Bleed valves had original rust. In other words they didn’t do the job .
Hello, everyone. I changed the engine air filter on my 2015 GLK 350 4matic, and I noticed oil on the air filter and the case.
The lower filter part was wet in oil, and the filter case had oil on the corner of the case. I had to dry the oil with a towel.
Any thoughts on what could be the problem? How much would it cost to fix it, or is it something simple that I can do myself?
Thanks for the help!
Please post photos of the oil leak and inside of intake ducts.
I asked for the break fluid change because you mentioned it in the other post. I will ask the mechanic about about activating the ABS module open.
Is there a video about activating the ABS module? to ask the mechanic informed questions.
Originally Posted by Mmr1
Ask him what the total procedure is for Brake Fluid , see if he tells you he has to activate the ABS module open so it flushes also. That ABS replacement is like 1200$ !!
The last time I paid for a brake flush, a few months later I had it on a different lift and saw my Bleed valves had original rust. In other words they didn’t do the job .
Thank you, Tim!
I just got this car, and I'm not used to posting the Engine model because I didn't even know till last night when I spent about an hour searching online.
The engine is M276, (model code X204)
I saw that post last night and the oil catcher. I find it very interesting that people need to create a part to fix Mercedes's problems!
Here is the link to the oil catcher for those who want to see it.
I'm posting a photo of the old air filter with oil because I changed the filter yesterday and cleaned the filter holder case.
I must add that in the link Mmr1 posted, they mentioned that the oil would fall on the alternator, and it did. There were no leaks or oil on the engine until I opened the filter box. I saw the wet filter, and after that, I checked the air filter box holder, and the oil had accumulated in the lower corner close to the radiator.
There was quite a bit of oil because when I tried to clean it, it spilled on the alternator and part of the chassis. I sprayed Simple Green on the engine, chassis, and alternator to remove some of the oil. I hope I don't have any alternator problems later on.
.
Originally Posted by chassis
Please post photos of the oil leak and inside of intake ducts.
Thank you, Tim!
I just got this car, and I'm not used to posting the Engine model because I didn't even know till last night when I spent about an hour searching online.
The engine is M276, (model code X204)
I saw that post last night and the oil catcher. I find it very interesting that people need to create a part to fix Mercedes's problems!
Here is the link to the oil catcher for those who want to see it.
You know it's legit when it's made out of carbon fiber and you're able to select the correct color finishing ring. Others will cut corners and not offer custom configuration.
That’s a lot of oil on the filter and it looks maybe original . Did you test vacuum or try lifting up on the oil cap with motor running to check PCV , it’s like a 5 hour job to replace it.
Yes, there was a lot of oil on the filter box. I assume this was the factory filter, and nine years later, with no maintenance, it probably accumulated a lot of oil.
I'm not sure if you read the preview post about what the mechanic said and the similar post someone posted here saying that this was a common problem and I should not worry about it?
The mechanic has the car, and I will get it back to you later today.
Originally Posted by Mmr1
That’s a lot of oil on the filter and it looks maybe original . Did you test vacuum or try lifting up on the oil cap with motor running to check PCV , it’s like a 5 hour job to replace it.
That PCV (sic) system is a LOT easier on the M272 engine. Probably a 30 minute job, including the second PCV "low load" valve on the left side top of the engine. I guess on the M276 MB managed to put the one on the rear of the right head almost inaccessible (must have hired a BMW engineer to design that part). ;-)
I can understand the desire to add a catch can - it's a "belt and suspenders thing" on one of the MB V6s, since they essentially have a couple of them anyway. But adding one more (or really, two more, one for each return line to the throttle body) makes a certain kind of sense, to remove even more oil droplets from the vapor that's sucked into the intake, where any oil at all can eventually build up and gum up all those magnificent moving parts in there (requiring a total intake manifold replacement).
FWIW, I did a video on replacing the PCV system on the M272...
Silver Shadow. The second post in this thread I state that the pvc is probably bad and how to do a quick test. I am taking about after market products that are not of concern. First he needs to get it to MB spec, because now it is not correct
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