Gates 33935 Engine Coolant Thermostat

Overview of Gates Integrated Housing Thermostat 33935

The Gates Integrated Housing Thermostat 33935 is designed for precise engine temperature regulation in select BMW and Land Rover vehicles. This engine coolant thermostat ensures optimal cooling system performance with an integrated housing design and electric operation.

• Integrated housing thermostat type with electric operation
• Start to open temperature at 105°C (221°F) for accurate thermal control
• Outlet outside diameter of 1.51 inches and inside diameter of 1.3 inches
• Equipped with one jiggle pin/weep hole for air bleeding
• Four bolt holes for secure mounting
• OE performance rating, engineered for BMW 540i, 740i, 740iL, Land Rover Range Rover, X5, and Z8 models

Detailed Product Description

The Gates Integrated Housing Thermostat 33935 combines the thermostat and housing into a single unit, simplifying installation and improving reliability. This part features an electric thermostat mechanism that begins to open at 105°C (221°F), maintaining precise engine temperature control. The integrated jiggle pin weep hole allows trapped air to escape, preventing airlocks and ensuring consistent coolant flow. With an outlet inside diameter of 1.3 inches and an outside diameter of 1.51 inches, this thermostat housing fits securely with four bolt holes for stable attachment.

This thermostat is compatible with various BMW models including the 540i, 740i, and 740iL, as well as Land Rover vehicles such as the Range Rover, X5, and Z8. The part number 33935 corresponds to this specific integrated housing thermostat, designed to meet OE performance standards though it is not an exact OE replacement.

About the Integrated Housing Thermostat Product Line

The Gates Integrated Housing Thermostat line offers a streamlined solution by combining the thermostat and housing into one component. This design reduces potential leak points and simplifies the cooling system assembly. The electric thermostat feature enhances temperature regulation accuracy, which is critical for maintaining engine efficiency and preventing overheating in BMW and Land Rover vehicles.

Common Applications and Issues Addressed

• Regulates engine temperature to prevent overheating
• Eliminates coolant leaks associated with separate housing units
• Prevents airlocks in the cooling system with jiggle pin weep hole
• Ensures proper coolant flow for engine performance
• Replaces faulty or worn thermostats in BMW 540i, 740i, 740iL and Land Rover Range Rover, X5, Z8 models

Installation Notes and Tips

• Ensure compatibility with vehicle make and model before installation
• Use proper torque on the four mounting bolts to avoid leaks
• Check coolant levels and bleed air from the system using the jiggle pin weep hole
• Replace seals as needed to maintain a secure fit
• Follow manufacturer guidelines for electric thermostat wiring and connections

Quality Assurance and Warranty

The Gates Integrated Housing Thermostat 33935 is manufactured to meet OE performance standards, providing reliable operation for BMW and Land Rover cooling systems. While not an exact OE part, it is engineered for durability and consistent temperature control. Warranty details should be confirmed with the parts distributor or manufacturer.