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Code p052B, engine noise?

Tiny
BHAMDOC1973
  • MEMBER
  • 2015 BMW 428I XDRIVE
  • 4 CYL
  • TURBO
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I bought this one with engine noise that I am almost 100% it's not coming from the bottom end, would start for a second and stall. Marble sound noise, one code p052B related to camshaft.

it is not an XI, regular 2wd.
Saturday, February 10th, 2024 AT 1:21 PM

10 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

More specifically, the code indicates camshaft A is retarded at start up. Most commonly, this is going to be an issue with either a VVT actuator or VVT timing solenoid. However, it could be a timing issue as well.

Keep in mind, the VVT is controlled by engine oil. If you are hearing a lot of noise, I suspect the solenoid was starved of oil due to dirt or extremely low oil.

I attached a pic below showing the actuators. Start by removing and inspecting them. Also, inspect the timing chain for wear.

Let me know.

Joe

See pic below.
Image (Click to make bigger)
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Saturday, February 10th, 2024 AT 5:53 PM
Tiny
BHAMDOC1973
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So, the front ones are the actuators, where are the solenoids?
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Saturday, February 10th, 2024 AT 6:59 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
The solenoids are behind those. That is an actuator, the solenoid is at the cam.

Joe
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Sunday, February 11th, 2024 AT 2:40 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,657 POSTS
Oh, okay.
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Sunday, February 11th, 2024 AT 2:46 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,657 POSTS
Is this an interference motor?
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Sunday, February 11th, 2024 AT 6:48 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

To the best of my knowledge, it is. Are you worried about it jumping time? If so, pull the spark plugs, take a borescope, and check in each cylinder for evidence of damage.

Let me know if I can help in any way.

Joe
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Sunday, February 11th, 2024 AT 8:35 PM
Tiny
BHAMDOC1973
  • MEMBER
  • 1,657 POSTS
I removed the actuator, visually looks good. But when I put it back and left it unplugged the car started better and stayed on longer. I was able to get a better video of the noise.
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Tuesday, February 13th, 2024 AT 8:34 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Hi,

I listened to the video. Have you checked the timing? It sounded off when cranking.

Let me know.

Joe
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Tuesday, February 13th, 2024 AT 2:47 PM
Tiny
BHAMDOC1973
  • MEMBER
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I only have code p52 have not checked the timing. Even if it was off shouldn't make this noise.
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Tuesday, February 13th, 2024 AT 2:50 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
That's my fear. Could we be hearing internal interference?

Joe
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Tuesday, February 13th, 2024 AT 3:08 PM

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