MAHLE Engine Coolant Outlet Gasket 01-16 GM 6.6L Duramax LLY/LBZ/LMM/LML
Are you replacing a leaking thermostat housing gasket? The MAHLE Thermostat Housing Gasket is a direct-fit OE replacement that seals the thermostat housing to the engine’s coolant outlet. This gasket prevents coolant leaks at the housing connection point, helping maintain proper cooling system pressure and ensuring stable engine operating temperatures. Replacing a worn or brittle gasket during thermostat or cooling system service helps prevent coolant seepage that can lead to overheating, coolant loss, or reduced engine reliability.
Manufactured to meet or exceed original equipment specifications, the MAHLE C31900 features OE-style construction engineered for precise fitment and dependable sealing performance. The gasket is designed to withstand continuous exposure to coolant, engine heat, and pressure cycles while maintaining a consistent seal between the thermostat housing and cylinder head. Built with durable materials and strict manufacturing standards, MAHLE gaskets provide long-lasting reliability and install easily as a direct replacement during thermostat replacement or cooling system service.

Description
Are you replacing a leaking thermostat housing gasket? The MAHLE Thermostat Housing Gasket is a direct-fit OE replacement that seals the thermostat housing to the engine’s coolant outlet. This gasket prevents coolant leaks at the housing connection point, helping maintain proper cooling system pressure and ensuring stable engine operating temperatures. Replacing a worn or brittle gasket during thermostat or cooling system service helps prevent coolant seepage that can lead to overheating, coolant loss, or reduced engine reliability.
Manufactured to meet or exceed original equipment specifications, the MAHLE C31900 features OE-style construction engineered for precise fitment and dependable sealing performance. The gasket is designed to withstand continuous exposure to coolant, engine heat, and pressure cycles while maintaining a consistent seal between the thermostat housing and cylinder head. Built with durable materials and strict manufacturing standards, MAHLE gaskets provide long-lasting reliability and install easily as a direct replacement during thermostat replacement or cooling system service.




















