Upper Thermostat Housing for Perkins Diesel Engines SKU: QT4133L054

A cracked or warped thermostat housing creates coolant leaks, overheating, and poor temperature regulation that can leave your engine damaged and your work stalled. This replacement housing restores the proper seal and coolant flow path your Perkins diesel engine needs for reliable operation under load.

Why This Part Matters

• Precision-machined sealing surfaces ensure leak-free operation
• Factory-spec coolant passages maintain proper flow rates
• Built to handle engine heat cycles and vibration over years of service
• Direct replacement design eliminates fitment guesswork

When your temperature gauge starts climbing or you spot coolant puddles under the engine, a failing thermostat housing is often the culprit. S&H Parts has the cooling system expertise to keep your equipment running right.