Motorad 511-185 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for Select GM Vehicles

The Motorad Standard 511-185 engine coolant thermostat is designed to maintain optimal engine temperature for Buick, Chevrolet, Pontiac, and Saturn models. Engineered to open at 185 degrees Fahrenheit, this thermostat ensures efficient coolant flow and engine performance.

• Sealing flange outside diameter: 1.72 inches
• Height between flanges: 1.87 inches
• Overall height: 2.67 inches
• Standard type thermostat with jiggle pin weep hole
• Includes rubber gasket with O-ring seal
• Bypass diameter: 1.09 inches; bypass length: 1.89 inches
• Flange thickness: 0.05 inches
• Start to open temperature: 185°F
• One seal included; installation tool not 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 like the 511-185 thermostat, which balances performance and durability for everyday driving conditions in compatible GM vehicles.

Detailed Product Description

The Motorad Standard 511-185 engine coolant thermostat is crafted to regulate engine temperature by opening at 185 degrees Fahrenheit, allowing coolant to circulate and prevent overheating. Its sealing flange outside diameter of 1.72 inches and height between flanges of 1.87 inches ensure a precise fit within the cooling system. The included rubber gasket with an O-ring seal provides a secure, leak-free installation. The jiggle pin weep hole helps release trapped air, improving coolant flow and system efficiency. This thermostat is compatible with Buick Aura, Chevrolet Impala, Malibu, Monte Carlo, Montana, Pontiac G6, Relay, Saturn Aura, Terraza, Uplander, and Vue models.

Common Applications and Issues Addressed

• Prevents engine overheating by regulating coolant flow
• Resolves inconsistent engine temperature readings
• Eliminates coolant leaks caused by worn seals
• Improves heater performance during cold starts
• Addresses engine warm-up delays due to faulty thermostat

Installation Notes and Tips

• Ensure engine is cool before removal and installation
• Replace the gasket and seal included with the thermostat to prevent leaks
• Check the jiggle pin weep hole for blockage before installation
• Torque mounting bolts to manufacturer specifications
• Bleed the cooling system after installation to remove air pockets

Quality Assurance and Warranty

Motorad Standard thermostats are manufactured to meet or exceed OEM standards for fit and function. The 511-185 thermostat includes a high-quality rubber gasket and O-ring seal to ensure durability and leak resistance. While specific warranty details are not provided, Motorad products typically undergo rigorous quality control to support reliable engine cooling system performance.