A/C - Small Flakes from Vents
Group 64Heating and
Air Conditioning
Bulletin Number
64 17 92 (3674)
Woodcliff Lake, NJ
August 1993
Product Engineering
This Service Information bulletin supersedes.S.I. 64 17 92 (3674) dated March 1993. It contains additional E30 information. Please remove and discard S.I. 64 17 92 (3674) dated March 1993 from your S.I. binder.
SUBJECT:
Small Flakes from Air Conditioning Vents
MODELS:
E30/E31/E32/E34
Situation:
Special polyurethane coated air conditioning evaporators are available from BMW Parts. This coating reduces the adhesion of water to the evaporator surface, and prevents the condensation from initiating surface oxidation of the aluminum tubes and fins in the evaporator assembly. Aluminum oxide particles can separate from the evaporator surface and be blown out the vents. These particles appear as small white flakes.
Parts Information:
Coated Evaporator, E31, E32, E34: P/N 64 11 8 391 277
Coated Evaporator, E30: P/N 64 51 8 391 780
Note:
These coated parts are compatible with both R-12 and R-134a systems.