Motorad 5511-185 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for Select GM Vehicles

The Motorad UltraStat 5511-185 engine coolant thermostat is designed to maintain optimal engine temperature for Buick, Chevrolet, Pontiac, and Saturn models. This thermostat ensures precise temperature regulation at 185 degrees Fahrenheit, helping your vehicle's cooling system operate efficiently.

• Sealing flange outside diameter: 1.72 inches
• Includes a rubber gasket/seal for secure installation
• Jiggle pin weep hole for proper air bleeding
• Bypass diameter of 1.09 inches and bypass length of 1.89 inches
• Flange thickness of 0.05 inches
• Temperature rating: 185°F
• Compatible with Buick Aura, Chevrolet Impala, Malibu, Monte Carlo, Montana, Pontiac G6, Relay, Saturn Aura, Relay, Terraza, Uplander, and Vue

About the Motorad UltraStat Product Line

The UltraStat line from Motorad focuses on precision-engineered thermostats that meet or exceed OEM specifications. The 5511-185 thermostat is part of this line, offering reliable temperature control and durability for a range of GM vehicles. UltraStat thermostats are designed to provide consistent performance and help maintain engine efficiency under various operating conditions.

Detailed Product Description

This engine coolant thermostat features a 1.72-inch sealing flange outside diameter and includes a rubber gasket to ensure a tight seal and prevent leaks. The jiggle pin weep hole allows trapped air to escape, reducing the risk of overheating. With a bypass diameter of 1.09 inches and a bypass length of 1.89 inches, this thermostat supports proper coolant flow during engine warm-up. The flange thickness of 0.05 inches contributes to a secure fit within the housing. Rated for 185 degrees Fahrenheit, the thermostat opens at the correct temperature to regulate coolant flow and maintain engine temperature within optimal limits.

Compatible Vehicles and Common Applications

• Buick Aura, Lucerne
• Chevrolet Impala, Malibu, Montana, Monte Carlo
• Pontiac G6, Relay, Terraza
• Saturn Aura, Relay, Uplander, Vue

This thermostat is commonly used to address issues such as engine overheating, poor heater performance, coolant leaks at the thermostat housing, and inconsistent engine temperature readings.

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns.
• Replace the included rubber gasket to maintain a proper seal.
• Check the thermostat housing and surrounding components for wear or damage during installation.
• Bleed the cooling system properly to remove air pockets, aided by the jiggle pin weep hole.
• No installation tool is included; use appropriate hand tools for removal and installation.

Quality Assurance and Warranty

The Motorad UltraStat 5511-185 thermostat is manufactured to meet strict quality standards for durability and performance. It includes a rubber gasket to ensure leak-free operation. While specific warranty details are not provided, Motorad products typically adhere to industry standards for reliability and fitment accuracy.