Gates 34858 Engine Coolant Thermostat

Overview of Gates Integrated Housing Thermostat 34858

The Gates Integrated Housing Thermostat 34858 is engineered to regulate engine temperature efficiently for Acura MDX, RLX, and TLX models. Designed with precision, this engine coolant thermostat ensures optimal cooling system performance and helps maintain consistent engine operating temperatures.

• Integrated housing thermostat design for streamlined installation
• Start to open temperature at 172°F (78°C) for accurate thermal control
• Three bolt hole configuration for secure mounting
• Includes a jiggle pin weep hole to prevent air lock
• Outlet inside diameters of 1.08 inches and 0.42 inches
• Outlet outside diameters of 1.34 inches and 0.61 inches
• OE performance rating for reliable operation

Detailed Product Description

The Gates Integrated Housing Thermostat 34858 combines the thermostat and housing into a single unit, simplifying the cooling system assembly for Acura MDX, RLX, and TLX vehicles. This design reduces potential leak points and improves coolant flow efficiency. The thermostat begins to open at 172°F (78°C), ensuring the engine reaches optimal temperature before coolant circulation increases. Featuring three bolt holes, the housing mounts securely to the engine block. The jiggle pin weep hole allows trapped air to escape, preventing air pockets that can cause overheating. With outlet inside diameters of 1.08 and 0.42 inches and corresponding outside diameters of 1.34 and 0.61 inches, this thermostat housing fits precisely within the cooling system plumbing.

About the Integrated Housing Thermostat Product Line

The Gates Integrated Housing Thermostat line is designed to combine the thermostat and housing into a single, integrated component. This approach reduces installation complexity and potential failure points compared to separate thermostat and housing assemblies. The 34858 part number represents this design philosophy, providing a reliable and efficient cooling system component for specific Acura models.

Common Applications and Issues Addressed

• Maintains proper engine temperature for Acura MDX, RLX, and TLX
• Prevents engine overheating due to thermostat failure
• Eliminates coolant leaks from worn or damaged thermostat housings
• Reduces air lock issues in the cooling system with jiggle pin weep hole
• Ensures consistent coolant flow for improved engine performance

Installation Notes and Tips

When installing the Gates Integrated Housing Thermostat 34858, ensure the mating surfaces are clean and free of old gasket material. Use the correct torque specifications for the three bolt holes to avoid warping the housing. Verify the jiggle pin is unobstructed to allow proper air venting. This thermostat is not electric and does not include a check valve, so confirm compatibility with your vehicle’s cooling system design. Always replace the seal to maintain a leak-free installation.

Quality Assurance and Warranty

The Gates Integrated Housing Thermostat 34858 meets OE performance standards, ensuring reliable operation in Acura MDX, RLX, and TLX vehicles. Manufactured with quality materials and precision engineering, this thermostat housing is designed for durability and consistent thermal regulation. Warranty information is provided by Gates and typically covers defects in material and workmanship under normal use conditions.