Motorad CH8729 Engine Coolant Thermostat Housing - Rear

Engine Coolant Thermostat Housing for Volkswagen

Motorad CH8729 is an engine coolant thermostat housing built for OE-style cooling system service. It is manufactured to OEM quality standards by an OE supplier and uses a proprietary material selected for demanding thermal conditions in modern engines.

Compatible with select Volkswagen applications, including 2006-2010 Volkswagen Passat, rear; 2006-2009 Volkswagen Bora, rear; 2006-2009 Volkswagen EuroVan, rear; and 2007 Volkswagen Golf, rear with AZV or BKD engine designation. The Motorad CH8729 thermostat housing is thermal shock validated and 100% leak tested for cooling system integrity.

Key Features

• Engine coolant thermostat housing for rear engine cooling system service
• Manufactured to OEM quality standards by an OE supplier
• Proprietary material formulated for demanding automotive cooling systems
• Thermal shock validated for temperature cycling durability
• 100% leak tested before release
• Bolts included: No

Detailed Description

The Motorad CH8729 thermostat housing is a direct-fit cooling system component for Volkswagen models that use a rear-mounted housing location. It is engineered for consistent coolant routing and sealing performance in applications such as the Volkswagen Passat, Volkswagen Bora, Volkswagen EuroVan, and Volkswagen Golf. This part number, CH8729, is also referenced in cross applications under 9CH8729 and 902-729, with URO 038121132G listed as another interchange reference.

What It Helps Fix

• Coolant leaks at the thermostat housing or water outlet
• Cracked or heat-damaged plastic housing surfaces
• Improper thermostat sealing at the rear engine outlet
• Cooling system pressure loss from worn housing seals
• Overheating caused by a compromised coolant outlet assembly

Installation Notes and Quality Assurance

Install on the rear of the engine where specified by the vehicle application. Verify the engine designation on 2007 Volkswagen Golf models with AZV or BKD engines before ordering. Because bolts are not included, reuse or source the correct fasteners as required by the vehicle service procedure. Motorad validates this housing for thermal shock resistance and leak performance to support reliable cooling system service.