Exhaust Sys. - Vibration/Droning At Idle
SI B18 02 08
Exhaust Systems
November 2010
Technical Service
This Service Information bulletin supersedes SI B18 02 08 dated August 2010.
[NEW] designates changes to this revision
SUBJECT
Vibration at Idle
MODEL
E60 with N52K, N52
SITUATION
The customer may complain of a slight vibration and/or droning noise when the vehicle is idling in park, neutral, drive and reverse when the engine
is at operating temperature.
CAUSE
Insufficient vibration dampening of the exhaust system
PROCEDURE
E60 with N52 - Proceed to step 4.
1. Verify the complaint. Vibration and/or droning is most prevalent when the engine is at operating temperature.
2. Remove the lower bracket for the exhaust system. If the droning/vibration is gone, proceed to step three. If vibration/droning still exists with the
lower bracket removed, continue troubleshooting the exhaust/driveline for other causes or conditions.
2010 BMW 528i (E60) L6-3.0L (N52K) Page 180
3. Remove the complete bracket assembly and replace it with bracket (1), P/N 18 20 7 521 346, using two new ASA bolts (P/N 07 12 9 905 417).
Tighten to 21Nm.
Install the front pipe bracket (1), P/N 18 20 7 521 347, with four rubber bushings (2) (P/N 18 20 7 546 579) to the new 346 bracket with two ASA
bolts (P/N ) and two nuts (P/N 07 12 9 904 580). Tighten down to 21Nm.
4. Replace the stock 88Hz exhaust vibration dampener (1) with the 32hz dampener, P/N 18 10 7 506 145. Tighten to 21Nm.
After performing this procedure, the vehicle will exhibit the same amount of normal driveline vibration as a comparably equipped E60 with an M54
or N52 engine.
PARTS INFORMATION
2010 BMW 528i (E60) L6-3.0L (N52K) Page 181
