Four Seasons 85254 Engine Coolant Thermostat Housing

Reliable Engine Coolant Thermostat Housing for GM Vehicles

The Four Seasons Thermostat Housing 85254 is designed to provide a durable and precise fit for a range of GM vehicles including Cadillac, Chevrolet, GMC, Hummer, and Pontiac models. Engineered from aluminum, this thermostat housing ensures efficient heat dissipation and long-lasting performance.

• Constructed from high-quality aluminum for durability and heat resistance
• Includes gasket or seal for a secure, leak-free installation
• Compatible with multiple GM models such as Chevrolet Silverado 1500, Cadillac Escalade, and GMC Sierra 2500
• Meets or exceeds OEM specifications for reliable performance
• Designed without thermostat, allowing use with existing or aftermarket thermostats
• Precise bolt hole center measurements of 2.93 and 3.000 inches for accurate fitment
• Inlet port diameter of 1.307 inches and flange thickness of 0.395 inches
• Overall height of 2.51 inches for proper clearance and installation

About the Four Seasons Thermostat Housing Product Line

The Four Seasons Thermostat Housing line focuses on engine coolant components that meet or exceed OEM standards. This product line is engineered to provide reliable sealing and fitment for various engine cooling systems. The 85254 housing is part of this line, offering a robust aluminum construction and compatibility with a wide range of GM trucks and SUVs, ensuring consistent engine temperature regulation.

Product Details and Specifications

This engine coolant thermostat housing is crafted from aluminum, which offers excellent resistance to corrosion and heat, essential for maintaining engine cooling efficiency. The housing comes with a gasket or seal included, ensuring a tight, leak-free connection to the engine block. It is designed without a thermostat, allowing you to install your preferred thermostat separately. The precise bolt hole center-to-center measurements of 2.93 and 3.000 inches guarantee a proper fit on compatible vehicles. The inlet port diameter measures 1.307 inches, and the flange thickness is 0.395 inches, providing a secure mounting surface. With an overall height of 2.51 inches, this housing fits well within the engine bay without interference.

Compatible Vehicles and Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche 1500, Camaro, Corvette, Silverado 1500, Silverado 2500, Silverado 3500, Suburban 1500, Suburban 2500, Tahoe, Trailblazer EXT
• GMC Sierra 1500, Sierra 1500 HD, Sierra 2500, Sierra 2500 HD, Sierra 3500, Envoy, Envoy XL, Envoy XUV, Yukon, Yukon XL 1500, Yukon XL 2500
• Hummer H2
• Pontiac Firebird
• Chevrolet Express 1500, 2500, 3500 and GMC Savana 1500, 2500, 3500

Common Issues Addressed by This Thermostat Housing

• Leaking or cracked thermostat housing causing coolant loss
• Overheating due to faulty or damaged housing
• Corrosion or wear compromising engine coolant flow
• Improper fitment leading to coolant leaks or engine damage
• Replacement of worn or damaged OEM thermostat housing

Installation Notes and Tips

Before installation, ensure the engine is cool and the cooling system is depressurized. Remove the old thermostat housing carefully to avoid damaging surrounding components. Clean the mounting surface thoroughly to ensure a proper seal with the included gasket. Verify bolt hole alignment using the specified center-to-center measurements (2.93 and 3.000 inches). Torque bolts to manufacturer specifications to prevent leaks. Since this housing does not include a thermostat, install a compatible thermostat separately according to vehicle requirements.

Quality Assurance and Warranty

The Four Seasons Thermostat Housing 85254 meets or exceeds OEM standards, ensuring reliable performance and durability. Manufactured from corrosion-resistant aluminum, it is designed to withstand the demands of engine cooling systems. This part includes a gasket or seal to support a leak-free installation. While specific warranty details are not provided, Four Seasons products typically adhere to industry quality standards for automotive replacement parts.