So we noticed that my upper oil acumulator tubes were colapsing under vacuum and that they were very worn. So when we had everything apart we replaced items 14 and 15 here:
Now when we have everything back together it seems that there is an alarming amount of oil dumping into the manifold through these tubes. Would this idicate items 1 and 2 also need to be replaced?
I'm kind of afraid to ask this as the last couple time I and my mechanic friend were basically called incompetant and told to buy a GT1 or go to the dealer, so any help beyond those 2 solutions would be great.
Thanks for any help (even if it is just to call me incompetant).
Bob
__________________
2001 Jet Black M5
2006 Jeep Grand Cherokee Limited 5.7 HEMI
2001 Dodge neon - Slomatic winter beater
Items 1 and 2 are the oil separators.
Take them off and clean them out, they are probably full of gunk.
They do not need to be replaced, unless cracked, as there is nothing in them but a baffle.
Squirt a bunch of brake cleaner through them until the cleaner comes through clean. If you have compressed air, blow them out. Then they should be as good as new.
Also check the drain lines 9 & 10 for blockage and condition of the rubber. If deteriated or cracked, replace them also. Life span on these rubber hoses is generally 5 to 7 years, so most M5s are getting to be due for new hoses.
If cleaning the separators does not work, there may be an issue somewhere else in the crankcase ventilation system
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So we noticed that my upper oil acumulator tubes were colapsing under vacuum and that they were very worn. So when we had everything apart we replaced items 14 and 15 here:
Now when we have everything back together it seems that there is an alarming amount of oil dumping into the manifold through these tubes. Would this idicate items 1 and 2 also need to be replaced?
I'm kind of afraid to ask this as the last couple time I and my mechanic friend were basically called incompetant and told to buy a GT1 or go to the dealer, so any help beyond those 2 solutions would be great.
Thanks for any help (even if it is just to call me incompetant).
Bob
Hiya,
What makes you think the oil wasn't dumping into manifold in the first place ?
Check your air filters, no oil in there right ?
What has your oil consumption been like recently ?
I think the only reason oil is dumping into the manifold is because of a failed vanos O ring (dont quote me on this)
The only logical explanation for oil in the manifold is that #1 & 2 OR 9 & 10 are clogged. I've never heard of either of those things happening, nor would I call that a root cause, so much as an additional symptom of a larger problem.
So, my advice is to check 1,2,9, & 10 to ensure they are not clogged. As mentioned, 1 & 2 are cyclones and are hollow, so use brake cleaner on them and they'll be good to go.
If you find any of the 4 are clogged then you need to keep searching to understand why - crankcase over-pressure, for example could be forcing excess air through the system and would be symptom of excess blowby on 1 or more cylinders...
The only logical explanation for oil in the manifold is that #1 & 2 OR 9 & 10 are clogged. I've never heard of either of those things happening, nor would I call that a root cause, so much as an additional symptom of a larger problem.
So, my advice is to check 1,2,9, & 10 to ensure they are not clogged. As mentioned, 1 & 2 are cyclones and are hollow, so use brake cleaner on them and they'll be good to go.
If you find any of the 4 are clogged then you need to keep searching to understand why - crankcase over-pressure, for example could be forcing excess air through the system and would be symptom of excess blowby on 1 or more cylinders...
d-
I see why if 1,2,9 & 10 are clogged it could lead to oil in the manifold !
But surely its got to be more than this if he said oil was being dumped into the manifold at an "ALARMING" rate ?
I see why if 1,2,9 & 10 are clogged it could lead to oil in the manifold !
But surely its got to be more than this if he said oil was being dumped into the manifold at an "ALARMING" rate ?
The only thing flowing through those accumulators / tubes is vapor from the crankcase. Because the crankcase vent tube is at the top of the crankcase (and not the bottom) it is almost impossible for anything but vapor to be coming out of it. The only way, therefore, that oil can flow at an "alarming" rate is if the small amount of oil contained in the vapor is unable to drain through the separators. This in turn requires that either a) some of those 4 things are clogged, or b) the OP doesn't understand how much oil he should expect to see in the manifold. In his post he has asked that we not assume he is incompetent, so I went with option A
Now I suppose, in theory, his crankcase could be SO over-filled that oil was physically flowing through the tubes, but that would require a reading so high on the dipstick, and so much additional oil to have been added (think multiple quarts over full, not a couple ounces) that I discarded that possibility out of hand, again in accordance with the assumption the OP is not incompetent
Now, were the OP to tell us he had done additional work at the same time, then there might be other explanations, but for a simple accumulator tube swap, there simply isn't much he could have done wrong and there aren't too many other options...
d-
Last edited by DouglasABaker; 7th March 2009 at 14:55.
There was a lot of additional work done at the same time.
Both vanos units were removed and all o-rings replaced (oil eveident in airfilters etc.) and valvecover gaskets were done.
The car was started for a couple minutes to test the clutch (new on installed, but not applicable to the issue) and check codes, there was a vanos solenoid code, so at this point we are assuming we broke a solenoid or a connection. When we went to dissassemble the car again there was a lot of oil in the manifold that hadn't been there before.
The car had minimal oil consumption prior to this. Maybe a quart every 5K miles, but I rarely let it go that long betwen changes.
Bob
__________________
2001 Jet Black M5
2006 Jeep Grand Cherokee Limited 5.7 HEMI
2001 Dodge neon - Slomatic winter beater
There was a lot of additional work done at the same time.
Both vanos units were removed and all o-rings replaced (oil eveident in airfilters etc.) and valvecover gaskets were done.
The car was started for a couple minutes to test the clutch (new on installed, but not applicable to the issue) and check codes, there was a vanos solenoid code, so at this point we are assuming we broke a solenoid or a connection. When we went to dissassemble the car again there was a lot of oil in the manifold that hadn't been there before.
The car had minimal oil consumption prior to this. Maybe a quart every 5K miles, but I rarely let it go that long betwen changes.
Bob
Define "a lot" please. "A lot" as in "a lot more than after we cleaned it" or "a lot" as in "a lot of oil - nearly a quart!"
There was a lot of additional work done at the same time.
Both vanos units were removed and all o-rings replaced (oil eveident in airfilters etc.) and valvecover gaskets were done.
The car was started for a couple minutes to test the clutch (new on installed, but not applicable to the issue) and check codes, there was a vanos solenoid code, so at this point we are assuming we broke a solenoid or a connection. When we went to dissassemble the car again there was a lot of oil in the manifold that hadn't been there before.
The car had minimal oil consumption prior to this. Maybe a quart every 5K miles, but I rarely let it go that long betwen changes.
Quote:
Originally Posted by M5 London
Hiya,
What makes you think the oil wasn't dumping into manifold in the first place ?
Check your air filters, no oil in there right ?
What has your oil consumption been like recently ?
I think the only reason oil is dumping into the manifold is because of a failed vanos O ring (dont quote me on this)
Thanks
Kumaran
Hi Bob,
So there was oil in the air filters before you started the repair ?
I presume the most logical outcome is the Vanos O Rings were not replaced correctly ?!
Has the oil risen to a level in the plenum such that it is now flowing back to your air filters again ?
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