Calorstat TH6988.87J Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing for Audi A4

Calorstat TH6988.87J is an engine coolant thermostat housing assembly built with a black plastic housing, integrated gasket seal, and three outlet ports. It is listed for 2005-2009 Audi A4 and 2005-2009 Audi A4 Quattro applications, with OE-supplier context noted for Audi coverage.

Key Features

• Engine coolant thermostat housing assembly for the cooling system
• Plastic housing with black finish
• Gasket included for sealing at installation
• Three outlet ports for the specified coolant routing
• Two mounting holes for direct attachment
• Starts to open at 188.0 degrees
• Calorstat TH6988.87J part number for catalog matching

Detailed Description

This thermostat housing assembly is built to manage coolant flow through the engine cooling circuit by housing the thermostat and providing the outlet connections needed for the system layout. The 188.0-degree start-to-open temperature supports temperature regulation in the specified Audi A4 and Audi A4 Quattro fitments. Calorstat TH6988.87J is a direct catalog reference for buyers searching for an Audi A4 thermostat housing assembly, Audi A4 Quattro coolant thermostat housing, or TH6988.87J replacement part.

This part cross-references Dorman - OE Solutions 576-189 and Gates 34069 for the same application.

What It Helps Address

• Coolant leaks at the thermostat housing or gasket interface
• Cracked or heat-aged plastic housing
• Unstable engine operating temperature
• Restricted coolant routing through the housing assembly
• Fault codes or drivability concerns tied to cooling system performance

Installation Notes and Tips

Verify the engine code and cooling system layout before installation on 2005-2009 Audi A4 and 2005-2009 Audi A4 Quattro models. Inspect the mating surfaces, replace damaged coolant lines or seals as needed, and confirm the gasket seats evenly before refilling and bleeding the cooling system. Match the outlet port configuration and mounting hole locations to the original housing.

Quality Assurance

Calorstat TH6988.87J is listed with OE-supplier context for Audi coverage and is specified with the correct housing material, gasket inclusion, and opening temperature for the stated applications. Use the part number TH6988.87J to confirm catalog accuracy when ordering a replacement thermostat housing for Audi A4 cooling system service.