Gates 33937 Engine Coolant Thermostat

Overview of Gates Integrated Housing Thermostat 33937

The Gates Integrated Housing Thermostat 33937 is engineered for precise engine temperature regulation in select BMW models. Designed to maintain optimal coolant flow, this thermostat ensures efficient engine performance and longevity.

• Integrated housing thermostat design with 4 bolt holes for secure mounting
• Start to open temperature at 95°C (203°F) for accurate thermal control
• Includes a jiggle pin weep hole to prevent air lock and ensure smooth coolant circulation
• Outlet inside diameter of 1.189 inches and outside diameter of 1.41 inches for proper hose fitment
• OE exact replacement meeting original equipment specifications

Detailed Product Description

This engine coolant thermostat from Gates features an integrated housing design, combining the thermostat and housing into a single unit for streamlined installation and improved reliability. The part number 33937 is specifically designed for BMW vehicles including the 318i, 318is, 318ti, and Z3 models. The thermostat opens at 95°C (203°F), allowing coolant to flow through the engine at the correct temperature to prevent overheating or overcooling.

The thermostat housing includes four bolt holes for secure attachment and a jiggle pin weep hole that helps release trapped air, reducing the risk of coolant system air locks. With an outlet inside diameter of 1.189 inches and an outside diameter of 1.41 inches, this part ensures a proper seal and fit with the vehicle’s cooling system hoses.

About the Integrated Housing Thermostat Product Line

The Gates Integrated Housing Thermostat line combines the thermostat and housing into a single assembly, simplifying replacement and reducing potential leak points. This design is intended to provide a reliable, OE exact fit and function, making it suitable for precise engine temperature management in BMW vehicles such as the 318i, 318is, 318ti, and Z3.

Common Applications and Issues Addressed

• Replacement for faulty or stuck thermostats causing engine overheating
• Resolving coolant leaks from damaged or worn thermostat housings
• Preventing air locks in the cooling system with the jiggle pin weep hole
• Maintaining proper engine operating temperature for fuel efficiency and emissions control
• Ensuring reliable coolant flow in BMW 318i, 318is, 318ti, and Z3 models

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Use the four bolt holes to securely fasten the thermostat housing to the engine block
• Check and replace any seals or gaskets to prevent coolant leaks
• Verify the jiggle pin weep hole is unobstructed for proper air release
• Confirm correct orientation of the thermostat for accurate temperature regulation

Quality Assurance and Warranty

The Gates Integrated Housing Thermostat 33937 is manufactured to meet OE exact standards, ensuring compatibility and performance consistent with original parts. While specific warranty details are not provided here, Gates products typically undergo rigorous quality control to support durability and reliability in automotive cooling systems.