A/C - Clicking Noise From Compressor After Turn-Off
Group 64Heating and
Air Conditioning
Bulletin Number
64 05 94 (4123)
Woodcliff Lake, NJ
April 1995
Product Engineering
SUBJECT:
Ratcheting/Clicking Noise from A/C Compressor After Turn-Off
MODELS:
E36 with M42 Engine, 4/94-5/94 production
Situation:
Complaint of intermittent clicking or ratcheting-like noise for about 5 seconds after the A/C compressor shuts or cycles off.
Affected Vehicles:
E36 vehicles with the M42 engine, produced 4/94 to 5/94, may exhibit this problem. The affected compressors have a range of date codes (on the compressor label) starting with "940127XXXX" and ending with "940329XXXX." All compressors must have a date code within this range (January 27, 1994 through March 29, 1994 compressor production) to qualify for this repair.
Cause:
Due to an internal compressor assembly error, after shutoff the high pressure refrigerant can flow in reverse, turn the compressor backwards, and cause this noise.
Solution:
If a customer complaint of this type of noise originating from the compressor is encountered, replace the NC compressor with P/N 6452 8 390228.
Parts Information: A/C Compressor 64 52 8 390 228
Note:
The part number has not been changed. BMW Parts has been cleared of all affected stock. Any affected parts found in dealer parts inventory should be returned through normal parts return channels.
Warranty Status:
Parts and labor are reimbursable under the terms of the applicable BMW New Car Limited Warranty.
Defect Code: 64 52 903 900
Labor Operation: 64 50 009 Recover & Recharge Refrigerant
Labor Allowance: 14 FRU
Labor Operation: 64 52 520 Replace Compressor
Labor Allowance: Refer to appropriate Flat Rate Manual