Calorstat TH7189.87J Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Calorstat TH7189.87J is an engine coolant thermostat housing assembly built with a plastic housing, black finish, and a gasket included for service-ready replacement. It is specified to begin opening at 188.0 degrees, helping regulate coolant flow as the engine reaches operating temperature.

Compatible with select Volkswagen Beetle, Golf, and Jetta applications, as well as Audi A3 models, this thermostat housing assembly supports accurate coolant control in vehicles that rely on a precise thermostat housing design. The TH7189.87J is also cross-referenced to Gates 34777 for the same application.

Key Features

• Engine coolant thermostat housing assembly for cooling system service
• Plastic housing construction with black finish
• Gasket included with gasket-type sealing surface
• Starts to open at 188.0 degrees for temperature regulation
• 2 mounting holes and 4 outlet ports
• Fits select 2009-2014 Volkswagen Jetta, 2010-2014 Volkswagen Golf, 2013-2014 Volkswagen Beetle, and 2010-2013 Audi A3 applications

Detailed Description

Calorstat TH7189.87J is designed for vehicles that use a multi-port thermostat housing assembly to manage coolant routing through the engine cooling system. The plastic housing and included gasket support a direct replacement approach for service work on Volkswagen and Audi platforms, including 2009-2014 Volkswagen Jetta, 2010-2014 Volkswagen Golf, 2013-2014 Volkswagen Beetle, and 2010-2013 Audi A3. The 188.0-degree opening specification is important for maintaining proper engine warm-up and coolant circulation behavior.

This part number, TH7189.87J, is also associated with OE-style interchange references including Gates 34777, Motorad 806-189, and URO 03L121111AC.

What It Helps Address

• Coolant leaks at the thermostat housing sealing surface
• Temperature control issues caused by a worn thermostat housing assembly
• Cracked or heat-aged plastic housing components
• Improper coolant routing through the engine cooling system
• Service replacement needs on Volkswagen Jetta, Golf, Beetle, and Audi A3 cooling systems

Installation Notes and Tips

Verify the outlet port count, mounting hole layout, and opening temperature before installation. Clean the mating surfaces thoroughly and inspect the cooling system for contamination or damaged seals before fitting the new housing. Confirm vehicle-specific fitment by year, make, and model, especially on Volkswagen Jetta, Golf, Beetle, and Audi A3 applications.

Quality Assurance

Calorstat is listed as an OE supplier to Volkswagen and Audi for this application, supporting OE-style fitment expectations for the TH7189.87J thermostat housing assembly.