Motorad CH9919 Engine Coolant Thermostat Housing - To Radiator

Engine Coolant Thermostat Housing for VW and Audi

Motorad CH9919 is an engine coolant thermostat housing built for radiator-side cooling system service on select Volkswagen and Audi applications. It uses a plastic housing with a 1.24 in outlet diameter and is supplied without a gasket/seal or bolts.

Fits 1998-2013 Volkswagen and Audi models listed below, including Volkswagen Jetta, Beetle, Golf, GTI, Bora, Polo, Lupo, GLI, Golf City, SportVan, Jetta City, Clasico, and Audi TT, TT Quattro, A3, and S3.

• Plastic thermostat housing in black finish
• 1.24 in outlet diameter for radiator-side coolant routing
• No gasket or seal included
• No bolts included
• Thermal shock validated and 100% leak tested
• Manufactured to OEM quality standards by an OE supplier

Detailed Product Overview

This Motorad thermostat housing is made for cooling system repair where the original housing has cracked, warped, or begun leaking at the radiator connection. The CH9919 application coverage includes Volkswagen Jetta thermostat housing replacement, Volkswagen Beetle coolant outlet service, and Audi TT radiator-side thermostat housing repair. It cross-references Dorman OE Solutions 902-919 for the same application.

Built from proprietary material, this housing is validated for thermal shock and leak tested before release. That makes it a direct-fit service part for maintaining coolant flow integrity in vehicles that rely on a radiator-mounted outlet flange and clip arrangement.

Common Problems This Part Can Address

• Coolant leaks at the thermostat housing or outlet flange
• Cracked or brittle plastic housing from heat cycling
• Loss of coolant at the radiator-side connection
• Overheating caused by a compromised coolant passage
• Failed housing sealing surfaces during cooling system repair

Installation Notes and Tips

Verify the radiator-side configuration before installation and compare the outlet diameter, mounting style, and vehicle application to the original part. Because no gasket/seal or bolts are included, reuse only serviceable hardware and install with the correct sealing components specified for the vehicle. Inspect the mating surfaces, clip engagement, and adjacent coolant hoses before refilling and bleeding the system.

Quality Assurance

Motorad manufactures CH9919 to OEM quality standards as an OE supplier. The housing is thermal shock validated and 100% leak tested to support dependable cooling system service on Volkswagen Jetta, Beetle, Golf, and Audi TT applications.