Engine - Use of Wacker RTV Sealant for Intake Manifold

File In Section: 6 - Engine

Bulletin No.: 67-61-17A

Date: August, 1996

Subject:
Use of Wacker T-330 RTV Sealant
(Pronounced Vaucker T)

Models:
1990-96 Buick Road master, Estate Wagon
1990-96 Cadillac Fleetwood
1990-96 Chevrolet Camaro, Caprice, Corvette, Impala SS
1990-92 Oldsmobile Custom Cruiser
1990-96 Pontiac Firebird
with 4.3L, 5.7L Engine (VINs W, P, 5, 8 - RPOs L99, L98, LT1, LT4)
1990-96 Chevrolet and GMC Light and Medium Duty Trucks with 4.3L, 5.0L, 5.7L, 6.0L, 7.0L, 7.4L Engines
(VINs W, Z, E H, K, M, N, P, R - RPOs L35, LB4, L03, L05, LS0, LR0, L19, L30, L31)

This bulletin is being revised to add further Chevrolet models. Please discard Corporate Bulletin Number 67-61-17 (Section 6 - Engine).








When installing the intake manifold, use a 5 mm (1/4 in.) thick bead of Wacker T-330 RTV, P/N 12346192, on the front and rear sealing areas between the engine block and intake manifold. See Figures 1 and 2. Wacker T-330 RTV has improved adhesive abilities, is oxygen sensor safe, and is noncorrosive to ferrous metals. Wacker T-330 RW cannot be used in coolant sealing surface areas.