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Old 06-08-2018, 06:31 PM   #1  
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Join Date: Jan 2017
Location: Arizona
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My Ride: E60 BMW 530i (pre-LCI); sapphire black metallic, Dakota beige interior.
Model Year: 2007
Engine: N52
Default Running rough!

Hey everyone!
This is my first ever post after many years of lurking and learning knowledge in the depths of the net. Now, I am fully aware that the search bar is the most valuable tool but I come forth because at this point the riddle has one up on me.
I've been searching and diagnosing since January, still haven't been able to resolve this. I plead to my fellow mates for help in this endeavor.
All the maintenance listed has been meticulously done personally myself, according to all of your countless DIYs. Many of these jobs I've done a few times on E90's (friends, brother). I have also learned some coding and INPA and have already utilized it in a dedicated setup that I posess. Thank you all for these communities and the immense help!


Ok so here's the riddle!

SPECS:
2007 530i with the N52 in it, automatic transmission.
She has 112,000 miles on the dash.



WHAT'S BEEN DONE:
All parts are OEM

Serpentine belt (100,000mi)
Idler pulley (100,000mi)
Belt tensioner (100,000)
Ignition coils (all 6); (100,000mi)
Spark plugs (all 6) (100,000mi)
Fuel injector (only on cylinder 5) (112,000)
Engine air filter (100,000mi)
Cabin air filter (100,000mi)
New rotors, pads, sensors (100,000mi)
Brake fluid (100,000mi)
Battery (IBS trained via INPA); (100,000mi)
Starter motor (at 75,000mi)

VANOS removed and cleaned according to step by step procedures on Pelican Parts site.

New water pump and thermostat (parts are at home just need to install)

Both rear window regulators replaced (lol)

Only drives on Shell premium with a Techron full tank treatment before every oil change.

PCV was serviced as part of recall by BMW in April 2018.

Oil and filter strictly from BMW dealership, every 5000 miles religiously, along with a quart when it asks for it




SYMPTOMS:
Rough idle
Cylinder 5 misfire code in INPA (came back after clearing as well)
Very LIGHT, whitish smoke on startup AND during idle or acceleration. Not water vapor for sure but does not really smell sweet as coolant would have, had it mixed into the combustion... still not ruling that possibility out though.
Ignition coils are all new but I checked them all regardless by swapping each one out with a different one.
Spark plugs have no fouling, the wells didn't have any oil during spark plugs replacement, although I will pull them all just to double check next week!
After fuel injector at cylinder 5 was replaced, symptoms remained.

NOTE:
I'm going to do a compression test done along with a leak down test, next week!
Fingers crossed its not a burned valve or something mechanical...
Will be looking into examining the DISA valve components.
I do need advice on how to properly diagnose and rule out an intake crack at the cylinder being a culprit.
Read somewhere that the Valve Cover gasket could also be something to look out for... how to diagnose?
If anyone could please chime in and kindly steer me in the right direction, maybe show me something I missed, may the Universe bless you!

VIDEO LINKS:

Clear sound of the rough start, almost invisible smoke emanating from exhaust

In this one it visible smokes when I push the pedal

Overall view of the rough running of the motor
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Old 06-13-2018, 03:41 AM   #2  
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My Ride: 2009 535i
Model Year: 2009
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If you haven't done your VCG with that amount of miles I wouldn't be looking for unicorns. The VCG, oil filter housing gasket, and oil pan are the holy trinity. I had to do my VCG for my e90 around 80k miles and for my e60 at 55k (just finished this weekend). Both were causing misfires.
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Old 06-14-2018, 03:57 PM   #3  
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Join Date: Jan 2017
Location: Arizona
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My Ride: E60 BMW 530i (pre-LCI); sapphire black metallic, Dakota beige interior.
Model Year: 2007
Engine: N52
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Hmmm... that is a very interesting note raleighBahn, thanks for chiming in!
Did by chance either one of those misfires happen to be only on a single cylinder?
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Old 06-14-2018, 04:09 PM   #4  
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Model Year: 2009
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For the 328 yes and the 535 was multiple. The gasket can leak anywhere, including into the spark plug recesses where you can't see it.
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Old 06-14-2018, 04:17 PM   #5  
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My Ride: E60 BMW 530i (pre-LCI); sapphire black metallic, Dakota beige interior.
Model Year: 2007
Engine: N52
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Definitely looking into that...

I JUST realized that the Oil Filter housing on my 530 is the one with the oil cooler attached to it, just like the one on the picture I uploaded....
Starting to have a feeling that this may be it...

You definitely put me onto something here, thanks
Attached Thumbnails
Running rough!-ofh_n54.jpg  
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Old 06-14-2018, 08:10 PM   #6  
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My Ride: 2005 545i 6-speed
Model Year: 2005
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if you replaced your coils with the OEM bosch ones, make sure you clip it properly.. the new bosch coils clips are so thin and flimsy and it wouldnt click the plug nicely... i just changed all 8 for my n62 and it happened to me, so i replaced the new bosch coil clips with the old ones and no misfires... to test it, try using your finger to lift up the clip.. just in my case, but worth to check it out
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