Motorad 288-185 Engine Coolant Thermostat

Overview of Motorad Standard Engine Coolant Thermostat 288-185

The Motorad Standard Engine Coolant Thermostat 288-185 is designed to regulate engine temperature efficiently in select BMW models. This thermostat ensures optimal engine performance by maintaining a consistent coolant flow at the specified opening temperature.

• Sealing flange outside diameter: 3.31 inches
• Height between flanges: 1.56 inches
• Overall height: 2.23 inches
• Start to open temperature: 180°F
• Bypass diameter: 1.69 inches
• Bypass length: 1.71 inches
• Includes rubber gasket with O-ring seal
• Features jiggle pin weep hole for pressure regulation
• Flange thickness: 0.05 inches
• Number of seals included: 1

Detailed Product Description

This Motorad Standard thermostat (part number 288-185) is engineered to meet the cooling system requirements of BMW vehicles such as the 530i, 540i, 740i, 740iL, 750iL, 840Ci, 850Ci, 850CSi, and 850i. The thermostat opens at 180 degrees Fahrenheit, allowing coolant to circulate and maintain the engine within the optimal temperature range. The included rubber gasket with an O-ring seal ensures a secure, leak-free fit, while the jiggle pin weep hole helps relieve pressure and prevent air pockets in the cooling system. The precise dimensions, including a 3.31-inch sealing flange outside diameter and 1.56-inch height between flanges, facilitate proper installation and compatibility with the specified BMW models.

About the Motorad Standard Product Line

The Motorad Standard line offers reliable, OEM-quality replacement parts designed to meet factory specifications. This Standard engine coolant thermostat provides consistent performance and durability, making it suitable for routine maintenance and repair of BMW cooling systems. The line focuses on delivering essential components with accurate fitment and dependable operation.

Common Applications and Issues Addressed

• Regulates engine temperature to prevent overheating
• Prevents coolant leaks with included rubber gasket and O-ring seal
• Reduces risk of engine damage caused by improper coolant flow
• Helps maintain efficient engine warm-up times
• Eliminates air pockets in the cooling system via jiggle pin weep hole

Installation Notes and Tips

Ensure the engine is cool before removing the old thermostat to avoid burns. Clean the thermostat housing surface thoroughly before installing the new gasket and thermostat. Verify the jiggle pin is positioned correctly to allow proper venting. No special installation tools are included with this part, so standard hand tools are required. Tighten mounting bolts to manufacturer torque specifications to prevent leaks.

Quality Assurance and Warranty

Motorad Standard thermostats are manufactured to meet strict quality standards for fit and function. This part includes one rubber gasket and O-ring seal to ensure a reliable seal. While specific warranty details are not provided, Motorad products typically conform to industry standards for durability and performance.