Motorad CH9993 Engine Coolant Thermostat Housing - Lower

Engine Coolant Thermostat Housing for Volkswagen

Motorad CH9993 is an engine coolant thermostat housing built for lower cooling-system applications on select Volkswagen models. It is manufactured to OEM quality standards by an OE supplier and uses a proprietary material formulated for demanding coolant environments.

With thermal shock validation and 100% leak testing, this Motorad thermostat housing supports reliable coolant routing in the lower water outlet area. It is a direct-fit service part for Volkswagen Jetta, Beetle, and Golf applications listed below.

Key Features

• Engine coolant thermostat housing for lower cooling-system placement
• Outlet diameter: 1.25 in.
• Thermal shock validated for cooling-system temperature changes
• 100% leak tested before release
• Built to OEM quality standards by an OE supplier
• Motorad CH9993 replacement housing for select Volkswagen applications

Application Details

Compatible with 1998-2003 Volkswagen Beetle, lower; 1999-2003 Volkswagen Golf, lower; 2000-2003 Volkswagen Jetta, lower; and 2004 Volkswagen Jetta, lower. On Beetle, Golf, and Jetta applications, this part is used as the engine coolant water outlet and includes the housing and seal per the listed fitment notes. Motorad CH9993 is also referenced for the same application under cross-reference part numbers such as Dorman OE Solutions 902-993 and Gates CO34788.

What This Part Helps Address

• Coolant leakage at the lower thermostat housing or water outlet
• Cracked or heat-damaged plastic housing
• Improper coolant flow caused by a failing outlet assembly
• Service replacement for a worn Volkswagen lower coolant housing
• Cooling-system seepage around the thermostat housing seal

Installation Notes

Verify the lower position and outlet diameter before installation. Inspect the mating surfaces, coolant hoses, and adjacent seals for wear or contamination before reassembly. Drain and refill coolant according to the vehicle service procedure, then pressure-check the system after installation to confirm a leak-free repair.

Quality Assurance

This Motorad thermostat housing is produced to OEM quality standards, thermal shock validated, and 100% leak tested to support dependable cooling-system service.