A/C - Howling Rough Running Noise With Compressor ON
SI B64 10 10Heating and Air Conditioning
June 2011
Technical Service
This Service Information bulletin supersedes SI B64 10 10 dated December 2010.
[NEW] designates changes to this revision
SUBJECT
[NEW] Howling/Rough Running Noise when the A/C Compressor is Engaged
MODEL
E82, E88 (1 Series)
E90, E91, E92, E93 (3 Series)
[NEW] E89 (Z4)
[NEW] 1 Series and 3 Series vehicles equipped with the N51 and N52 engine produced from 8/31/08
[NEW] Z4 vehicles produced from 2/28/09
SITUATION
When the air conditioning system is on and the A/C compressor is activated, a howling noise may be heard between 800 and 2,400 rpm.
CAUSE
Vibration in the air condition suction line (low side)
PROCEDURE
See attachment
PARTS INFORMATION
[NEW] WARRANTY INFORMATION
ATTACHMENTS
B641010 - Procedure 1 and 3 Series
B641010 - Procedure Z4