NEW INTAKE MANIFOLD GASKET END SEAL AND USAGE

SUBJECT: NEW INTAKE MANIFOLD GASKET END SEAL AND USAGE

VEHICLES AFFECTED: ALL 1982-91 CADILLAC MODELS WITH 4.1L, 4.5L, 4.9L V-8 ENGINES

A new design intake manifold end seal has been developed to improve the integrity of this joint. The new design shown in Figure 1 has reinforced flanges to more positively retain the seal in position. A pair of these revised seals (one front and one rear) are available by ordering P/N 3635212.

Transverse Applications:

The revised seals, P/N 3635212, may be used as supplied on all transverse engine applications and should be used instead of the end seals supplied with the currently available intake manifold resealing kits or the intake manifold gasket kits. Eventually the revised end seals will be included in the gasket kits.

Longitudinal Application:

In order to use the new design seals on longitudinal engines, slight modification is required. Figure 2 indicates one area of the front seal and two areas on the rear seal which must be relieved to accommodate internal ribs in the longitudinal block. Material should be trimmed away only enough to allow the seal to lie flat on the cylinder block. As much of the flange as possible should be retained.

The new design seals in P/N 3635212 should be used instead of the end seals supplied with the intake manifold resealing kits or intake manifold gasket kits. Eventually properly modified seals will be included in the gasket kits.

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