Motorad CH6129 Engine Coolant Thermostat Housing - Upper

Engine Coolant Thermostat Housing Overview

The Motorad CH6129 engine coolant thermostat housing is built to OE quality standards for cooling system service. It uses a plastic housing design with a black finish and is thermal shock validated and 100% leak tested for dependable sealing in demanding coolant applications.

Compatible with Mazda cooling system repairs, this thermostat housing is a direct-fit style replacement for applications that use a 1.30 in outlet port diameter and a three-bolt mounting pattern. The Motorad CH6129 is engineered to meet or exceed OEM standards for fit and function.

Key Features

• Plastic housing construction for cooling system service
• Black finish for a clean OE-style appearance
• 1.30 in outlet diameter and 1.30 outlet port diameter
• Three mounting holes for the specified application
• Thermal shock validated and 100% leak tested
• Meets or exceeds OEM standards

Detailed Description

The Motorad CH6129 thermostat housing is designed for Mazda cooling system applications that require an upper coolant outlet housing. It is listed for the Mazda CX-50, Mazda CX-5, Mazda 3, Mazda 3 Sport, Mazda 6, and Mazda CX-3 in the fitment data, with notes indicating engine coolant water outlet with housing on several applications. The CH6129 part number is associated with OE-level replacement needs where sealing integrity and material stability matter.

As an OE supplier product, this housing is manufactured with proprietary material intended to handle demanding thermal cycling in modern cooling systems. The CH6129 supports service work where the original housing has cracked, warped, or begun leaking at the outlet connection. This part cross-references Dorman - OE Solutions 902-5198 for the same application.

What It Is Used For

• Replacing a cracked or damaged coolant thermostat housing
• Correcting coolant seepage at the outlet connection
• Restoring proper sealing in the cooling system
• Addressing housing wear from repeated heat cycling
• Servicing Mazda upper coolant outlet housing applications

Installation Notes and Tips

Verify the outlet diameter, mounting hole count, and fitment notes before installation. The housing is listed without a gasket or seal and without bolts, so confirm all required sealing components are on hand before service. Match the application to the Mazda CX-50, Mazda CX-5, Mazda 3, Mazda 3 Sport, Mazda 6, or Mazda CX-3 fitment details shown for the correct engine coolant water outlet configuration.

Quality Assurance

Motorad manufactures this part to OEM quality standards, with thermal shock validation and 100% leak testing. The CH6129 is built to meet or exceed OEM standards for cooling system service.