# Group 64 Heating & Air Conditioning Service Bulletins

#### Bulletin number

#### Title

#### Description

#### Date of issue

64 03 83 (749) | Heater control valve fuse installation, 318i | All models have a 2 amp fuse installed between the heater control valve and it's connector, blue and brown wires. Standard since May 1983 | May 1983
64 03 84 (826) | Air conditioning noise with 4 vane compressor 1984 318i | Replace with 5 vane compressor (green label) on customer complaint of noise | September 1984
64 08 84 (852) | Heating system complaints | Incorrect operation of controls, or poorly seating vent doors. | December 1984
64 13 84 (880) | Recall Campaign 84V-107 1984 318i | Install heater control valve inline fuse | November 1984
64 15 84 (900) | Air conditioning compressor - Electrical, 318i | Clutch does not engage due to cut or loose connection. | December 1984
64 16 84 (940) | Air conditioning / Heater blower motor switch | Some 85 model year 325e got 3 speed switch instead of 4 speed, change control panel and switch | December 1984
64 05 85 (1038) | Refrigerant Capacities | E30 2.1 lbs., M3 1.9 lbs. | July 1987
64 06 85 (1110) | Annoying sweet odor from heater | Leaking heater core, updated core released | December 1985
64 08 86 (1284) | Air conditioning compressor clutch does not engage | Check diode and wire from diode to clutch | December 1986
64 01 87 (1471) | Compressor clutch replacement, rotary style compressors | Newly released clutch kits. Pre 9/87 P/N 64 52 1 380 071. Since 9/87 P/N 64 52 1 386 297 | January 1988
64 01 88 (1566) | Auxiliary Fan Low Speed Resistor | Procedure to replace Auxiliary fan resistor | January 1988
64 03 88 (1604) | Auxiliary cooling fan M3 | By design, earlier cars have auxiliary fan wired to run with ignition on, can be updated to later style with kit P/N 17 11 9 061 201 | March 1988
64 04 88 (1622) | AC High Pressure Line | Deletion of fuel cooler, new AC lines do not have fuel cooler, eliminate cooler if replacing line. | April 1988
64 12 88 (1648) | Insufficient heating or cooling or odors. | Check for obstruction of vents under seats. | May 1988
64 14 88 (1666) | Air conditioning compressor controls | 1/88 and later have compressor control switch eliminated on lower and center air distribution slides | May 1988
64 16 88 (1682) | Inoperative AC compressor M3 | Bad connection at 108°C coolant temp switch. | July 1988
64 17 88 (1776) | Fogging up of windows | Use AC to dehumidify air | December 1988
64 02 89 (1821) | Fusible plug - Receiver / Drier | If it blows out, assume the high pressure cut out switch is inoperative. | February 1989
64 07 89 (1943) | Inoperative Air Conditioning | A/C button fails to illuminate, AC fails to operate. Cars up to 1/88 with Alpine weather band radio, sticker can fall off radio into slide controls, preventing slide from activating circuit | October 1989
64 06 90 (3095) | Air conditioner compressor does not engage, 1988 and earlier | Do not replace faulty compressor enable microswitch, cut wires and join with an inline fuse. Brings system in line with later production | August 1991
64 09 90 (3162) | Center air distribution lever binds | Fabricate and install 2 spacers on top of the heater housing, forward of the radio | December 1990
64 08 91 (3373) | Musty odors form air conditioning units | Apply spray disinfectant - not covered by warranty | October 1991
64 12 91 (3453) | Air conditioning belt length, 318 M42 | Belt specification changed from 890 to 885mm | February 1992
64 15 92 (3654) | Air conditioning compressor part numbers M20B25 engine | If car requires P/N 64 52 8 391 511, use P/N 64 52 1 385 416 | November 1992
64 17 92 (3674) | Small flakes from A/C vents | Oxidization coming loose from fins of evaporator. Replace evaporator with P/N 64 51 8 391 780 | August 1983
64 01 93 (3721) | Air conditioning belt tension, M20B25 engine | Improper tension may cause belt to rub on coolant hose. | January 1993
64 08 93 (3836) | Air conditioning howl / whistle, 93 iC equipped with R134a | Replace suction hose with P/N 64 53 9 066 449 | July 1993

E30 M3 Repair Manual V2.7. Copyright ©1999-2001 Koala Motorsport & Brett Anderson