Inline Thermostat Housing

The MEZIERE Inline Thermostat Housing (WN0072) is a precision aluminum cooling system component designed to regulate engine coolant temperature in high-performance and custom engine builds. This 1-1/2 inch hose barb inlet and outlet configuration integrates directly into coolant loop plumbing, allowing thermostat installation at a convenient location independent of the engine block itself. The polished aluminum construction provides corrosion resistance and professional appearance while maintaining full structural integrity under pressure cycling.

Inline thermostat housings are essential when custom engine bay layouts, serpentine pulley conversions, or non-traditional cooling systems prevent use of factory thermostat mounting points. The 1-1/2 inch hose barb connections (both inlet and outlet) mate directly with standard automotive heater hose or reinforced coolant line tubing, eliminating the need for adapters in most applications. Polished aluminum finish not only resists corrosion but also reflects radiant heat, contributing to lower underhood temperatures. Compact dimensions (3.35 x 3.35 x 4.85 inches) allow flexible placement within engine compartments where space constraints are critical.

This housing suits builders working on street rods, restomod vehicles, race engines, and marine or industrial powerplants where stock cooling architecture is unavailable or incompatible. MEZIERE is recognized in the performance cooling sector for manufacturing components that enable precise thermal management in unconventional engine configurations. The modular design allows builders to specify the thermostat rating separately, providing flexibility across different operating temperature targets and ambient conditions.

Proper coolant temperature control is fundamental to engine longevity and performance—too cold and fuel atomization and combustion efficiency suffer; too hot and cylinder head gaskets and bearing clearances are compromised. An inline housing lets builders position temperature sensing and regulation exactly where needed, independent of factory engine design constraints.