WATER LEAK FROM A/C MODULE RESEAL LOWER CASE PROCEDURE

SUBJECT WATER LEAKS FROM AIR CONDITIONING MODULE (RESEAL LOWER CASE)

MODELS/YEARS 1991 CUSTOM CRUISER

CONDITION:

---------- Water leaks from the A/C module lower evaporator case when making right turns or rapid lane changes.

CAUSE:

------ Inadequate sealing of the lower evaporator case to the A/C module.

CORRECTION:

----------- Remove the lower evaporator case and reseal with RTV sealant, using the following parts and service procedure as specified on pages 1 B1-27 and 1 B1 -28 in the 1991 Custom Cruiser Service Manual.

SERVICE PARTS:

Quantity Part Number Part Name

1 1052915 Silicone sealant - RTV 1 ** 52453695 Filter - foam

** There is enough material in this part to do several repair jobs.

Parts are currently available from GMSPO.

The following optional RTV Sealer may be purchased locally.

1 59875 Loctite Ultra Black-RTV

We believe this source and their product to be reliable. There may be additional manufacturers of this sealer. General Motors does not endorse, indicate any preference for or assume any responsibility for products from this firm or for any such items which may be available from other sources.

IMPORTANT: THE FOLLOWING STEPS ARE IN ADDITION TO THE PROCEDURE ON PAGES 1B1-27-28 OF YOUR 1991 CUSTOM CRUISER SERVICE MANUAL.

- After cleaning the lower evaporator case, remove the two (2) ridges as indicated in the illustration using a soldering iron, rotary file etc.

- When performing Step 1. of the "INSTALL OR CONNECT procedure" in the service manual, fill the grooves of the lower evaporator case with RTV sealant as indicated in the illustration. Use enough sealant to leave a bead of 1.5 to 2.0 mm (0.060" to 0.100") above the edges of the grooves. Allow the sealant to skin over before installing the case to the module.

Cut a piece of foam filter approximately 25 mm (1") by 65 mm (2.5") long. Fold the piece of foam filter end to end and insert it into the groove as indicated in the illustration. Add a bead of RTV sealant side to side across the groove and the foam filter to hold the filter in place as shown in the auxiliary view of the illustration.

Continue with the installation steps as specified in the service manual.

Please update your service manuals accordingly.

WARRANTY INFORMATION:

Labor Operation Number: T1663 Labor Time: 0.9 hours Trouble Code: 92

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.