Ninety-Eight FWD V6-181 3.0L (1985)
Technical Service Bulletin # 90T311B
Date: 900101
A/C System - Odors
SUBJECT
A/C ODOR (CLEANING PROCEDURE)
MODELS/YEARS
1988-90 CUTLASS CALAIS, 1985-90 EIGHTY-EIGHT
AND NINETY-EIGHT, 1986-90 TORONADO AND 1988 FIRENZA
NUMBER:
90-T-31
CORP.REF.NO: 811204R
DATE:
January 1990
SECTION:
1B
This bulletin cancels and supersedes Dealer Technical Bulletins 89-T-19 and 89-T-19A which may be disregarded.
This bulletin has been revised to include 1990 Eighty-Eighty, Ninety-Eight and Toronado models and 1988 Firenza models, 1988-90 Cutlass Calais
models.
For 1985-1990 Cutlass Clera models use Dealer Technical Bulletin 88-T-42.
Some vehicles may experience odors emitted from the air conditioning system primarily at start up in hot, humid climates. This odor may be the result of
debris in the heater/evaporator case and/or microbial growth on the evaporator core. To repair this condition, the following equipment and procedure
should be used:
Required Equipment:
^
GM Goodwrench Air Conditioning System Dislnfectant Kft, P/N 25533404
^
Kent-Moore tool J 36645 Air Conditioning System Cleaning Gun
^
Rubber gloves
^
Safety goggles (ordinary safety glasses are not sufficient)
^
Pedestal fan
^
Afterblow Module, P/N 25533406
Parts are currently available from GMSPO.
CAUTION:
This procedure should only be performed on a cold car. It has been demonstrated that irritating vapors will be formed in the engine
compartment if the disinfectant coming out of the drain outlet contacts hot engine components.
Disinfectant can cause substantial, but temporary, eye injury. Do not get in eyes or on clothing. Wash thoroughly with soap and
water after handling.
First Aid:
If disinfectant gets into eyes, hold eyelids open and flush with a steady, gentle stream of water for 15 minutes. Obtain medical
attention if irritation persists.
Procedure:
1.
Put on rubber gloves and safety goggles.
2.
Pour the small bottle of Goodwrench Air Conditioning System Disinfectant Kit, P/N 25533404, into the large bottle. Seal and invert the large
container once or twice to mix contents.
3.
Raise vehicle and remove drain grommet on vehicles equipped with a sound barrier on the heater/evaporator module.
4.
Lower vehicle.
5.
Connect battery charger and charge during cleaning to avoid draining the battery.
6.
Remove power module/resistor block as described in the appropriate service manual. Leaving wiring connectors attached to gain access to the
evaporator core face closest to the blower motor.
CAUTION:
Power module/resistor block heat sink may be hot.
NOTICE:
Do not allow the metal heat sink of the power module or the metal coils of the blower resistor to become grounded to any metal
surface as this may result in internal circuitry damage.
