Intake manifold gasket set for GM 4.3L, 11977

• Intake manifold gasket set for GM 4.3L, 11977

Intake Manifold Gasket Kit for GM 4.3L, 11977 seals the intake manifold against the cylinder heads and provides a clean separation of intake air, coolant and oil passages.

The kit is designed for GM-based 3.8L and 4.3L V6 pre-Vortec Marine applications with 12-bolt intake manifold.

Fits the following models:

• MerCruiser 3.8L and 4.3L V6 Pre-Vortec
• MerCruiser 4.3L and 4.3LX with 12-bolt intake manifold
• comparable Volvo Penta and OMC applications with the same intake manifold geometry

Technical information:

• for pre-Vortec 3.8L and 4.3L V6
• 12-bolt intake manifold
• 2 gaskets required per engine

Replaces the following reference numbers:

• MerCruiser 27-11977
• Volvo Penta 3850379
• Volvo Penta 857177
• OMC 0912978

FAQ for this article:

Which intake manifolds does this kit fit?
It is intended for the early 12-bolt version of the 3.8L and 4.3L V6 engines, not for later Vortec 8-bolt systems.

How can I recognize the correct engine version?
The pre-Vortec intake manifold with 12 fastening bolts is the distinguishing feature.

When should the kit be replaced?
Replacement is advisable if the intake manifold is dismantled, incorrect air flow, internal coolant loss or as part of an overhaul.