Motorad 274-180 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for BMW Models

The Motorad Standard 274-180 engine coolant thermostat is designed to maintain optimal engine temperature for a range of BMW vehicles. Engineered to open at 180°F, this thermostat ensures efficient coolant flow and temperature regulation for models including the 320i, 325i, 535i, M3, and Z3.

• Sealing flange outside diameter: 2.64 inches
• Height between flanges: 1.4 inches
• Standard type thermostat with jiggle pin weep hole
• Start to open temperature: 180°F
• Bypass diameter: 1.30 inches and bypass length: 1.02 inches
• Flange thickness: 0.05 inches
• Gasket or seal not included
• No installation tool included

About the Motorad Standard Product Line

The Motorad Standard line offers dependable engine cooling components designed to meet OEM specifications. This line focuses on providing quality replacement parts that maintain proper engine temperature control without additional accessories like gaskets or installation tools. The 274-180 thermostat fits within this line by delivering consistent performance for BMW engines requiring a 180°F opening temperature.

Product Details and Specifications

This engine coolant thermostat features a sealing flange outside diameter of 2.64 inches and a height between flanges of 1.4 inches, ensuring a precise fit within the cooling system. The thermostat opens at 180 degrees Fahrenheit, allowing coolant to circulate once the engine reaches optimal operating temperature. The jiggle pin weep hole helps prevent air pockets in the cooling system, improving overall efficiency. With a bypass diameter of 1.30 inches and a bypass length of 1.02 inches, this thermostat supports proper coolant flow during engine warm-up phases.

Compatible BMW Models and Applications

• BMW 320i, 323i, 323is, 323ti
• BMW 325e, 325i, 325is, 325iX
• BMW 328i, 328is
• BMW 525i, 528e, 535i, 535is
• BMW 635CSi, 735i, 735iL, 850Ci
• BMW M3, M5, M6, Z3

Common Issues Addressed by This Thermostat

• Engine overheating due to thermostat failure
• Poor engine warm-up performance
• Coolant flow restriction causing temperature fluctuations
• Air pockets in the cooling system affecting efficiency
• Inconsistent engine temperature regulation

Installation Notes and Tips

Installation of the Motorad Standard 274-180 thermostat requires removal of the old thermostat housing and careful placement of the new thermostat to ensure proper sealing. Note that this part does not include a gasket or seal, so a compatible gasket should be sourced separately. No installation tool is included, so standard automotive tools will be necessary. Ensure the jiggle pin is positioned correctly to allow air to escape during coolant circulation.

Quality Assurance and Warranty

Motorad Standard thermostats are manufactured to meet OEM specifications for fit and function. While no specific warranty information is provided with this part, Motorad products typically adhere to industry quality standards to ensure reliable operation within the specified temperature range of 180°F.