Just bought a 128i! Changed oil then rough idle / stalling after first drive

micktor · 06-07-2021, 07:44 PM

Just picked up a beautiful 2011 128i, 72k miles. Put a couple hundred miles on it no problem. Very next day decided to do some standard maintainence, serpentine belt was wearing out so I changed it along with new oil. Go for a first drive and reach a stop sign - the car is shaking violently and misfiring. Ruling out sparkplugs and coils as those were just changed. Doubt it's serpentine belt related it is on correctly and I double checked everything. This all leads me to the oil change causing the issue, I checked the level on first start and it was right at full line.

Here's what I've changed since the rough idle:
2 Vanos solenoids
2 Camshaft position sensors
Oil Filter cover
Checked fuses
Recalibrated valvetronic motor

Throwing codes:
P052B (Permanent)
P13B0 (Permanent)

Cleared the following:
2A9A
2A7C DME
P0016
Misfire (cyl 1-4)

After all of this - no change! Here is what the startup looks like. Anyone experience something like this before? I'm running out of ideas so any help is appreciated. I thought surely the solenoids would resolve the issue. Lovely first day of owning a BMW

Almuliman · 06-07-2021, 10:33 PM

Caveat emptor: I'm (clearly over) researching the 128i before buying, so Not An Expert.

Came across this the other day. The "non return valves". Seems ... plausible?

micktor · 06-08-2021, 12:42 AM

Quote:

Originally Posted by Almuliman

Caveat emptor: I'm (clearly over) researching the 128i before buying, so Not An Expert.

Came across this the other day. The "non return valves". Seems ... plausible?

Hah! Forgot to mention I did those too, they came out clean. My working theories now are

1. Sheared vanos bolts. Anyone know how to get it fixed under recall?
2. Valvetronic Eccentric Shaft Sensor

Probably going to take the valve cover off if a new set of Bosch coils + plugs doesn't change anything

gjm120 · 06-08-2021, 11:42 AM

micktor

Double check that the oil fill cap is on tight.

micktor · 06-08-2021, 02:22 PM

Quote:

Originally Posted by gjm120

micktor

Double check that the oil fill cap is on tight.

Thanks, yeah I checked the oil fill cap and checked the filter cover again. I started it with maf unplugged and eccentric shaft sensor unplugged, still rough and misfiring but didn't want to completely stall. Don't know what to make of that but we'll see what happens after the new coils and plugs go in

gjm120 · 06-08-2021, 05:13 PM

Quote:

Originally Posted by micktor

Thanks, yeah I checked the oil fill cap and checked the filter cover again. I started it with maf unplugged and eccentric shaft sensor unplugged, still rough and misfiring but didn't want to completely stall. Don't know what to make of that but we'll see what happens after the new coils and plugs go in

It's amazing how much a not sealed oil cap makes the car run bad. First time I changed my oil I thought I ruined my car.

micktor · 06-08-2021, 06:10 PM

Quote:

Originally Posted by gjm120

It's amazing how much a not sealed oil cap makes the car run bad. First time I changed my oil I thought I ruined my car.

Huh interesting I checked again after your comment and noticed that theres no square rubber piece that holds the cap from underneath. I don't think this part actually does anything other than hold the cap though does it? Going to order a new one just in case

tracer bullet · 06-08-2021, 07:15 PM

Quote:

Originally Posted by micktor

Huh interesting I checked again after your comment and noticed that theres no square rubber piece that holds the cap from underneath. I don't think this part actually does anything other than hold the cap though does it? Going to order a new one just in case

Vacuum leaks do funny things, worth getting a new one to be sure since they're cheap.

Quote:

Originally Posted by micktor

Ruling out sparkplugs and coils as those were just changed.

Well, when were they changed compared to when the issue started? Sounds like well before, but if it was at the same time then it could indeed be them.

micktor · 06-09-2021, 12:31 AM

Quote:

Originally Posted by tracer bullet

Vacuum leaks do funny things, worth getting a new one to be sure since they're cheap.

Well, when were they changed compared to when the issue started? Sounds like well before, but if it was at the same time then it could indeed be them.

Were changed by previous owner less than 5k miles ago, pulled them out and saw that they were an amazon brand which is why I'll be trying new ones today

micktor · 06-09-2021, 08:56 PM

Update: Changed all 6 plugs + coils + oil cap

Took video of idle again, theres a pronounced "trtrttrtr" noise when the revs are low. Anyone think this sounds familiar? I'm thinking fuel injectors?

tracer bullet · 06-10-2021, 08:02 AM

Injectors aren't unreasonable, having one stuck open will be a pronounced clatter.

Any cylinder specific codes? Did any plug look different than the others?

There's a chance you got some crappy gas the last fill up.

micktor · 06-12-2021, 03:22 PM

UPDATE: Vanos bolts sheared off, 3 months over 10 year recall...

Took off the valve cover to find my biggest suspicion was true, 3 bolts completely out and 4th missing the head. Will these be primarily be found in the oil pan? Is there a way to ensure I can find get them out? Didn't see anything in the head itself. Man I wish the dealer could do this for me lol

Billy C · 06-12-2021, 06:31 PM

This is crazy! I'm haven't payed much attention to the 128 posts because I've been off in N54 land but this seems like a crazy failure. Is this a common issue?

micktor · 06-12-2021, 06:42 PM

Quote:

Originally Posted by Billy C

This is crazy! I'm haven't payed much attention to the 128 posts because I've been off in N54 land but this seems like a crazy failure. Is this a common issue?

I'd assume it's only a matter of time if you fall under the affected years. If I were out of warranty and had no symptoms I'd at least check the bolts with an endoscope through the oil fill cap

tracer bullet · 06-12-2021, 07:56 PM

Woah. Unexpected. But - now you know what's wrong! Dang.

micktor · 06-12-2021, 08:06 PM

Quote:

Originally Posted by tracer bullet

Woah. Unexpected. But - now you know what's wrong! Dang.

Yeah I'm actually pretty happy to finally have a diagnosis, going to replace the timing sprockets and hope the valves never got bent.. fingers crossed

dtla1 · 06-14-2021, 05:48 PM

If the car was a CA car, doesn't it have a PZEV/SULEV classification? Then this might classify as an emissions warranty item 15yrs, 150k miles? I could be wrong though.

micktor · 06-14-2021, 06:58 PM

Quote:

Originally Posted by dtla1

If the car was a CA car, doesn't it have a PZEV/SULEV classification? Then this might classify as an emissions warranty item 15yrs, 150k miles? I could be wrong though.

It was initially purchased out of state so it has the n52k

micktor · 06-16-2021, 06:00 PM

Ever wondered where the bolts go when they fall?

micktor · 06-20-2021, 03:15 AM

FINAL UPDATE: Changed both vanos gears, set the timing and.. success! No more rough idle and a joy to drive

Rallysmurf · 06-20-2021, 08:49 AM

Quote:

Originally Posted by micktor

FINAL UPDATE: Changed both vanos gears, set the timing and.. success! No more rough idle and a joy to drive

How did you get the bolts out?

micktor · 07-16-2021, 08:56 PM

Quote:

Originally Posted by Rallysmurf

How did you get the bolts out?

Tried using grabber tools from the top- but in the end you just have to drop the oil pan

06-07-2021, 07:44 PM	#1
micktor New Member 13 Rep 14 Posts Drives: 2011 BMW 128i Join Date: Jun 2021 Location: CA iTrader: (0)	Just bought a 128i! Changed oil then rough idle / stalling after first drive Just picked up a beautiful 2011 128i, 72k miles. Put a couple hundred miles on it no problem. Very next day decided to do some standard maintainence, serpentine belt was wearing out so I changed it along with new oil. Go for a first drive and reach a stop sign - the car is shaking violently and misfiring. Ruling out sparkplugs and coils as those were just changed. Doubt it's serpentine belt related it is on correctly and I double checked everything. This all leads me to the oil change causing the issue, I checked the level on first start and it was right at full line. Here's what I've changed since the rough idle: 2 Vanos solenoids 2 Camshaft position sensors Oil Filter cover Checked fuses Recalibrated valvetronic motor Throwing codes: P052B (Permanent) P13B0 (Permanent) Cleared the following: 2A9A 2A7C DME P0016 Misfire (cyl 1-4) After all of this - no change! Here is what the startup looks like. Anyone experience something like this before? I'm running out of ideas so any help is appreciated. I thought surely the solenoids would resolve the issue. Lovely first day of owning a BMW
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06-07-2021, 10:33 PM	#2
Almuliman Lieutenant 484 Rep 566 Posts Drives: 2013 LMB 6MT 128i Join Date: Jun 2020 Location: Outside Seattle iTrader: (0)	Caveat emptor: I'm (clearly over) researching the 128i before buying, so Not An Expert. Came across this the other day. The "non return valves". Seems ... plausible?
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06-08-2021, 11:42 AM	#4
gjm120 Colonel 2183 Rep 2,806 Posts Drives: 2013 128i, 2021 230i Join Date: Jan 2016 Location: East Texas iTrader: (1)	micktor Double check that the oil fill cap is on tight. __________________ E82 / BMWP Springs / Koni Yellows / M front control arms / Adjustable front endlinks / M rear guide rods / Whiteline Poly RSFB
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06-09-2021, 08:56 PM	#10
micktor New Member 13 Rep 14 Posts Drives: 2011 BMW 128i Join Date: Jun 2021 Location: CA iTrader: (0)	Update: Changed all 6 plugs + coils + oil cap Took video of idle again, theres a pronounced "trtrttrtr" noise when the revs are low. Anyone think this sounds familiar? I'm thinking fuel injectors? Last edited by micktor; 06-09-2021 at 09:08 PM..
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06-10-2021, 08:02 AM	#11
tracer bullet Brigadier General 2412 Rep 3,548 Posts Drives: '11 135i , '15 X3 35i Join Date: May 2011 Location: Saint Paul, MN iTrader: (1)	Injectors aren't unreasonable, having one stuck open will be a pronounced clatter. Any cylinder specific codes? Did any plug look different than the others? There's a chance you got some crappy gas the last fill up.
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06-12-2021, 03:22 PM	#12
micktor New Member 13 Rep 14 Posts Drives: 2011 BMW 128i Join Date: Jun 2021 Location: CA iTrader: (0)	UPDATE: Vanos bolts sheared off, 3 months over 10 year recall... Took off the valve cover to find my biggest suspicion was true, 3 bolts completely out and 4th missing the head. Will these be primarily be found in the oil pan? Is there a way to ensure I can find get them out? Didn't see anything in the head itself. Man I wish the dealer could do this for me lol Attached Images
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06-12-2021, 06:31 PM	#13
Billy C New Member 2 Rep 6 Posts Drives: 2010 135i Join Date: May 2021 Location: North East USA iTrader: (0)	This is crazy! I'm haven't payed much attention to the 128 posts because I've been off in N54 land but this seems like a crazy failure. Is this a common issue?
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06-12-2021, 07:56 PM	#15
tracer bullet Brigadier General 2412 Rep 3,548 Posts Drives: '11 135i , '15 X3 35i Join Date: May 2011 Location: Saint Paul, MN iTrader: (1)	Woah. Unexpected. But - now you know what's wrong! Dang.
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06-14-2021, 05:48 PM	#17
dtla1 Colonel 828 Rep 2,232 Posts Drives: 2011 135i, Space Grey Join Date: Apr 2014 Location: Silicon Valley iTrader: (2)	If the car was a CA car, doesn't it have a PZEV/SULEV classification? Then this might classify as an emissions warranty item 15yrs, 150k miles? I could be wrong though.
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06-16-2021, 06:00 PM	#19
micktor New Member 13 Rep 14 Posts Drives: 2011 BMW 128i Join Date: Jun 2021 Location: CA iTrader: (0)	Ever wondered where the bolts go when they fall?
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06-20-2021, 03:15 AM	#20
micktor New Member 13 Rep 14 Posts Drives: 2011 BMW 128i Join Date: Jun 2021 Location: CA iTrader: (0)	FINAL UPDATE: Changed both vanos gears, set the timing and.. success! No more rough idle and a joy to drive
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