Cummins
Flywheel housing gasket for Cummins 6BTAA5.9-C178
This flywheel housing gasket, part number 3630874, fits Cummins 6BTAA5.9-C178, KTA38C-1050, QSM11-C335, and QSM19-C700 engines. It provides a seal between the engine block and the flywheel housing to prevent fluid leakage.
Compatible models
Specifications
- Part number
- 3630874
- Brand
- Cummins
The flywheel housing gasket acts as a seal between the engine block and the flywheel housing. Its primary purpose is to contain lubricating oil within the engine and prevent external contaminants from entering the transmission interface. By maintaining this seal, the component protects the clutch or torque converter from oil contamination, which can otherwise lead to operational issues such as slippage or overheating. Proper sealing is necessary to ensure the integrity of the engine lubrication system and the transmission connection.
This component is compatible with several Cummins engine models, including the 6BTAA5.9-C178, KTA38C-1050, QSM11-C335, and QSM19-C700. It is designed to match the specific mounting surface geometry of these engine blocks and housings to ensure a consistent fit under compression. The gasket is engineered to withstand the thermal and chemical environment typical of internal combustion engine operation, including exposure to engine oil and fluctuating temperatures.
In heavy machinery and industrial power units, the flywheel housing serves as the structural interface between the engine and the transmission or generator set. The gasket installed at this junction ensures that the connection remains airtight and leak-free, supporting the overall efficiency and cleanliness of the powertrain assembly.

