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E60 M5 and E63 M6 Aftermarket Intake Issues

8K views 29 replies 15 participants last post by  JamesInLV 
#1 · (Edited)
Just wanted to give everyone some insight on aftermarket intakes for the E60 M5 and E63 M6. The reason why a lot of people are having emissions faults and check engines is because none of the aftermarket intakes offer the air equalization screens that are designed to equalize the turbulance of the air before it reaches the factory airflow meters. We've spent a lot of time researching this and figured out this was the fault and loss of power a lot of people are seeing. The factory air boxes are equipped with the these screens, and the factory masss meter will read inaccurately with out them. Also, what causes a loss of power with the aftermarket filters is the abundance of oil in the filter which then ruins the mass meter with oil. If it is caught soon enough the mass meter can be cleaned with a mass meter cleaner from a company called CRC. It is designed to be sprayed on to the mass meter to clean dirt and residue, this in turn restores the efficiency of the mass meter. The product can be purchased from your local auto parts store such as Discount Auto Parts, Auto Zone, Advance Autoparts, NAPA, etc. Hope this helps!
 
#4 ·
If you do a K&N drop in or any other manufacturer you should be fine other than if the filter is soaked full of oil, as I said before, this ends up damaging the mass meter after a while. Your best bet would be to try and find a company that offers a drop in filter that is dryflow like AEM's new filters and doesn't require oil. I don't believe they offer a drop in for the M5 or M6 as yet but they should soon.
 
#9 ·
Your best bet would be to try and find a company that offers a drop in filter that is dryflow like AEM's new filters and doesn't require oil. I don't believe they offer a drop in for the M5 or M6 as yet but they should soon.
I contacted AEM to see if they had a cone filter that would work with the K&N intake kit. They don't make anything close to the measurements necessary. Most were too small, others were too long.

As was said, overoiling is one of the main issues. I've seen a lot of custom/exotic cars running K&N or other oil filter systems as manufacturer spec, and I find it hard to believe these companies were putting $50k+ engines into these cars with something that would hurt it. On the other hand, doing what has been suggested is just responsible, and easy, maintenance. Drop in the intakes/filters, drive a few hundred miles and blow out the MAF sensors. Repeat a few thousand miles later, and the risk of oil issues after that are probably very, very low.

K&N had a whitepaper on fouled MAF sensors with the M3 or M5 kit a few years ago. They asked everybody to send them their MAF sensors that the dealership service departments said were bad. Almost all, if not every one of the sensors that were sent into them as "bad" were operating perfectly normal.
 
#5 ·
+1 Don't over oil the filter, and you'll be fine... just apply a glaze when you re-oil the filter.
 
#7 ·
I thought the BMCs were not oiled.:dunno:
 
#8 ·
Thats old info. K&N's are not presently over oiled and neither are BMC's. Years ago oil from stock filters were a problem with the MAF sensor's. Not any more. Only if you are oiling them yourself. The point about air turbulence may have some merit except that the reduced power warning goes away upon restart and doesn't reappear even at high speeds ie. more turbulence. The warning doesn't appear though if you modify the the intake distal to the filter ie the RPI intake. Maybe its turbulence and maybe its the postion of the MAF in the aftermaket intake duct. Its not oil.
 
#10 · (Edited)
The airflow directed to the mass meter is much less equalized at partial throttle than at wide open, thus causing the CEL to come on during partial throttle driving more so than wide open. The reason why the code disappears during start up is because it's a soft code, still stored under pending and will reappear. The codes are directed towards mass airflow volume and lean mixture off idle to name a few.
It was never stated that the oil causes these codes, it simply decreases the efficiency of the mass meter if there is too much oil on the filter.
It's Funny how this doesn't happen with a stock airbox...
 
#12 ·
hmmm gotta read both side of the stories
 
#15 · (Edited)
His font (in this post at least) isn't any larger than yours? He uses blue b/c he has are is IB. Santa (not unlike others on this board) is an acquired taste. If you don't acquire it, just skip his posts.
 
#16 · (Edited)
I'll start posting in bright bold pink I guess. I mean, why not?

Maybe I am the only one who finds it annoying to be reading along black text and then all of a sudden bright blue caling attention to itself. I can't see any reason to change the color of font from default other than to call attention to oneself. Isn't the blue along with red in his sig enough?
 
#18 ·
Could mean you're getting cataracts if the glare is bothering you. Come on down and I'll check it out.
 
#20 ·
no cel with my gruppem intake, and they came with the screens.
 
#23 ·
Stupid Question.....

Feel free to throw me underneath the bus....but I thought the V10's in our car didn't use MAFs because of some spacing issues. I thought they use some complicated inference model to estimate the air going in each cylinder..... Feel free to call me an idiot but I thought I had read it somewhere at some point.

ASR Engineering....thanks for looking into this issue!
 
#24 · (Edited)
Here is some info!!

OK, it was really bothering me why I thought our engines didn't have MAFs..... But I didn't know where I had read it....I dug through my files and found out where....

Read the attached PDF. It is the Aftersales E92 M3 support document detailing the new M3..... In the engine section, it talks specifically about the air intake system....

Clear as day, it says the M3 engine (that was based on our V10s) doesn't have MAFs....

Perhaps the intake / filter systems are messing up the air intake estimation algorithm? What do you guys think?

I wish I get paid for having a good memory :hihihi:
 

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#30 ·
doubtful it's the problem, but who knows. Problem didn't surface until v25, proof that BMW just fubbed with the sensor parameters and screwed up all the research they DID do for several months. I'm tired of defending them so much, but I'll leave it with this...

My intakes have been working in these lower temperatures with NO ERRORS, even without a quick throttle-rev session before pulling away, for the past 2 weeks. Must like the lower temperatures here now (60 at night, 80 during the day...and just sunny) :)
 
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