Calorstat TH6501.87J Engine Coolant Thermostat

Engine Coolant Thermostat for Precise Temperature Control

Calorstat TH6501.87J is an engine coolant thermostat with an aluminum housing, a silver finish, and a rubber O-ring seal. It opens at 188.0 degrees to help regulate coolant flow and maintain stable operating temperature in the cooling system.

Built for service work on vehicles such as Chevrolet Malibu and Buick LaCrosse applications, this thermostat housing assembly is a direct-fit cooling system service part for drivers replacing a worn or sticking thermostat. The TH6501.87J part number is also useful when cross-checking OE-style replacement needs.

Key Features

• Engine coolant thermostat with aluminum housing
• Start-to-open temperature: 188.0 degrees
• Silver housing finish
• 3-bolt hole design
• Gasket or seal included
• Seal type: O-ring
• Seal material: rubber
• Height between flanges: 1.18

Detailed Description

Calorstat TH6501.87J is built as a thermostat and housing assembly for cooling system service where accurate coolant regulation matters. The aluminum housing provides a durable mounting surface, while the included O-ring seal helps support a secure connection at the housing interface. With a 188.0-degree start-to-open temperature, this thermostat is suited to applications that call for that specific operating range. Use TH6501.87J when replacing a thermostat on Chevrolet Malibu or Buick LaCrosse cooling systems that require this configuration.

This part cross-references Monroe Shocks & Struts (e.g., 353-189, 353-192) for the same application.

What It Helps Address

• Engine running too cool or too hot due to thermostat wear
• Delayed coolant circulation after warm-up
• Temperature fluctuation from a sticking thermostat
• Coolant seepage at the thermostat housing seal
• Cooling system service needs on Chevrolet Malibu and Buick LaCrosse models

Installation Notes and Tips

Verify the housing style, bolt-hole count, seal type, and opening temperature before installation. Clean the mating surfaces thoroughly and inspect the cooling system for contamination or damaged sealing faces before fitting the new thermostat assembly. Confirm the replacement matches the original TH6501.87J configuration and the vehicle’s required thermostat temperature specification.

Quality Assurance

Calorstat cooling system components are built to meet application-specific service requirements for thermostat replacement. Confirm part number TH6501.87J against the vehicle catalog and OE reference before installation.