Motorad CH3127 Engine Coolant Thermostat Housing - Upper

Engine Coolant Thermostat Housing for Mazda Miata

Motorad CH3127 is an aluminum engine coolant thermostat housing built for OE-style cooling system service. It is thermal shock validated and 100% leak tested to support dependable coolant flow in the Mazda Miata upper cooling circuit.

Key Features

• Aluminum construction with a silver finish
• Engine coolant thermostat housing for the upper position
• 2 mounting holes with 67.31 mm bolt hole center spacing
• 1.22 in. outlet port diameter and 2.54 in. inlet port diameter
• 59.69 mm overall height and 9.91 mm flange thickness
• Thermal shock validated and leak tested during manufacturing
• Motorad CH3127 OE-style replacement housing

Detailed Description

This Motorad thermostat housing is manufactured to OEM quality standards by an OE supplier using proprietary material selected for demanding automotive cooling systems. The aluminum housing is engineered for the upper thermostat housing location on 1994-1997 Mazda Miata and 1999-2005 Mazda Miata models, giving technicians a direct replacement option for cooling system repair. Motorad CH3127 is also cross-referenced to Gates CO35024 for the same application.

What It Helps Address

• Coolant leaks at the thermostat housing
• Cracked or corroded original housing surfaces
• Improper sealing at the upper coolant outlet
• Cooling system service on a Mazda Miata with thermostat housing wear
• Replacement of a damaged Motorad CH3127 or equivalent housing

Installation Notes and Tips

Verify the inlet and outlet port sizes, mounting hole spacing, and upper-position fitment before installation. This housing does not include a gasket or seal, bleeder screw, sensor, or mounting hardware, so those components must be sourced separately as needed. Clean all mating surfaces thoroughly and inspect the thermostat and hoses during service on the Mazda Miata cooling system.

Quality Assurance

Motorad manufactures this housing to OE supplier standards and validates it for thermal shock resistance and leak integrity before release. The result is a replacement thermostat housing built for consistent fit and sealing performance in confirmed Mazda Miata applications.