M275 oil in turbo
11-10-2016, 07:04 PM
#1
Super Member
Thread Starter
M275 oil in turbo
I searched and found nothing on this subject so here it goes. There are S ome oil in the driver side turbo. The passenger side is dry. What would caused the oil to be on one side and not the other? Is it a real concern?
What is the best way to clean off the oil to see if it would return?
What is the best way to clean off the oil to see if it would return?
11-10-2016, 08:35 PM
#2
Senior Member
Isn't the PCV system full pressure line routed into the driver's side intake? So, that side would have a bit of oil residue, while the other side shouldn't...
Last edited by Astro14; 11-10-2016 at 08:38 PM.
11-10-2016, 09:02 PM
#3
MBWorld Fanatic!
Turbo? Or intercooler?
It's not uncommon for older turbos to leak slightly past the seals, a little oil in the system is no reason to panic.
Best way to clean is remove and flush with a brake cleaner or something that leaves no residue, and see if it fills back up. It won't hurt anything to have that little bit of oil in there though.
It's not uncommon for older turbos to leak slightly past the seals, a little oil in the system is no reason to panic.
Best way to clean is remove and flush with a brake cleaner or something that leaves no residue, and see if it fills back up. It won't hurt anything to have that little bit of oil in there though.
11-10-2016, 09:27 PM
#4
Super Member
Thread Starter
I mean the intercooler. The car had issues with oil in the coolant system in the past and it looks to be free of oil in the coolant hoses this time. More oils are found in the marked area and I guess the oils come from there.
Is that amount of oil normal? I'm trying to figure out if it's the culprit for my P0307 error.
Is that amount of oil normal? I'm trying to figure out if it's the culprit for my P0307 error.
11-10-2016, 10:13 PM
#5
MBWorld Fanatic!
307 is a misfire. Odds are you have an ignition issue as they are fairly common on this engine.
A little oil won't hurt and that little bit shouldn't cause a misfire, and almost certainly not on a front cyl, as the TB is on the back of the manifold and would have to be pretty strange to direct any oil going through it all the way to the front of the intake manifold and only one cylinder.
How recent are your spark plugs? Ever done coils or ICM?
A little oil won't hurt and that little bit shouldn't cause a misfire, and almost certainly not on a front cyl, as the TB is on the back of the manifold and would have to be pretty strange to direct any oil going through it all the way to the front of the intake manifold and only one cylinder.
How recent are your spark plugs? Ever done coils or ICM?
11-10-2016, 10:57 PM
#6
Super Member
Thread Starter
The plugs on mine are old. I didn't think about them as the previous owner paid for the NGK plugs 5k miles ago.
I opened them up last week and found the Bosch so looked like I got ripped off. Anyway, I am replacing them now and I just noticed the plug on #7/#8 are wetter than other ones.
I opened them up last week and found the Bosch so looked like I got ripped off. Anyway, I am replacing them now and I just noticed the plug on #7/#8 are wetter than other ones.
11-10-2016, 11:03 PM
#7
Super Member
Thread Starter
Originally Posted by ItalianJoe1
A little oil won't hurt and that little bit shouldn't cause a misfire, and almost certainly not on a front cyl, as the TB is on the back of the manifold and would have to be pretty strange to direct any oil going through it all the way to the front of the intake manifold and only one cylinder.
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11-11-2016, 09:28 AM
#8
MBWorld Fanatic!
MB documents actually advise that its normal to see a bit of oil in and around the LHS turbo, due to the crankcase breathing. Nothing to worry about.
Nick
Nick
11-11-2016, 10:16 AM
#9
Super Member
Thread Starter
Originally Posted by Welwynnick
MB documents actually advise that its normal to see a bit of oil in and around the LHS turbo, due to the crankcase breathing. Nothing to worry about.
Nick
Nick
11-12-2016, 09:20 PM
#10
Super Member
Thread Starter
I replaced all plugs. Had some fun with them but #7 misfire still there if I leave the engine in idle mode for more than 3min. Also it drives like a C class after the plug works.
#7 & #8 old plugs were wet with oil. What else should I try?
#7 & #8 old plugs were wet with oil. What else should I try?
11-14-2016, 07:52 PM
#14
Super Member
Thread Starter
Took Jack's clues, I decided not to touch anything to see if it would come back by itself.
It did and she's now alive.
Still having occasional restarts at stop lights for #7 misfire. This is really getting old.
It did and she's now alive.
Still having occasional restarts at stop lights for #7 misfire. This is really getting old.
11-14-2016, 08:44 PM
#15
Super Member
Glad to see it worked for you, sorry to hear the misfire persists.
11-14-2016, 09:39 PM
#16
Super Member
Thread Starter
I just pumped a tank with non-ethanol fuel to see if it would make a difference. Found a Phillips 66 with 91 octane fuel. They used to carry the 87 only.
What are V12TT users pumping?
What are V12TT users pumping?
11-15-2016, 09:12 AM
#18
Super Member
Thread Starter
I don't have access to 93 ethanol gas. I was pumping 91 ethanol gas until yesterday.
