1975 - 1977 Corvette: Service Bulletin: Cemented Weatherstrip Removal

Model Year: 1975-1977
Subject: Cemented Weatherstrip Removal
Source: Chevrolet Dealer Service Information Bulletin
Number: 77-I-23, Section I
Date: April, 1977

To: All Chevrolet Dealers

During the 1975 model year, a new weatherstrip adhesive was released into production for all applicable door, side roof rail, deck lid and tailgate weatherstrips. The new material (greyish brown in color) proved superior to the previously used black adhesive for weatherstrip bonding and water leak prevention. This new adhesive is resistant to solvents and some weatherstrip adhesive release agents. Attempts at weatherstrip removal without a proven release agent often results in torn weatherstrips. There are two release agents available in the field for this purpose:

• 3M Improved Release Agent, P/N 08971.
• Kent Special Release Agent, Stock No. SR-A.

To properly remove weatherstrips without damage, use the following instructions:

1. Carefully loosen weatherstrip sufficiently to expose area of weatherstrip cement application.
   
   
2. Liberally spray cement bond with 3M No. 08971 Release Agent or Kent Special Release Agent SR-A and allow material to penetrate cement bond for 30-60 seconds.
   
   
3. Carefully pull weatherstrip in area of release agent to determine if weatherstrip is separating from cement. If not, re-apply release agent and let soak an additional 30-60 seconds.
   
   
4. Carefully peel weatherstrip from cement bond. If area of firm bond is felt, apply release agent while exerting slight pressure against weatherstrip until weatherstrip separates from cement.
   
   
5. When weatherstrip is completely removed, clean any excess release agent from bond area. Re-install weatherstrip with application of 3M Black No. 8011 or Super (yellow) No. 8001 Weatherstrip Adhesive, or Kent \"NXF\" Adhesive.
   

   Chevrolet Motor Division
   General Motors Corporation

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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.