Motorad 523-190 Engine Coolant Thermostat

Overview of Motorad Standard Engine Coolant Thermostat 523-190

The Motorad Standard Engine Coolant Thermostat 523-190 is engineered to regulate engine temperature efficiently in select GM vehicles. Designed for reliable operation, this thermostat ensures your engine maintains optimal temperature for performance and longevity.

• Start to open temperature: 187°F for precise temperature control
• Sealing flange outside diameter: 2.2 inches for secure fitment
• Includes rubber gasket with O-ring seal for leak prevention
• Features jiggle pin weep hole to prevent air lock
• Bypass diameter of 1.58 inches and length of 2.12 inches for proper coolant flow
• Flange thickness: 0.05 inches, height between flanges: 1.89 inches
• Compatible with multiple Buick, Cadillac, Chevrolet, GMC, Hummer, and Saab models

Detailed Product Description

This Motorad Standard thermostat (part number 523-190) is a standard type engine coolant thermostat designed to open at 187 degrees Fahrenheit, ensuring your engine warms up quickly and maintains the correct operating temperature. The thermostat includes a rubber gasket with an O-ring seal type, providing a tight seal to prevent coolant leaks. The jiggle pin weep hole allows trapped air to escape, reducing the risk of overheating due to air pockets in the cooling system. The sealing flange outside diameter measures 2.2 inches, with a flange thickness of 0.05 inches, ensuring a precise fit within the thermostat housing. The bypass diameter and length (1.58 inches and 2.12 inches respectively) facilitate proper coolant circulation when the thermostat is closed.

The height of the thermostat is 2.7 inches, with a height between flanges of 1.89 inches, dimensions that match OEM specifications for the compatible vehicles listed. This thermostat is designed for use in a variety of GM vehicles, including Chevrolet Silverado 1500, GMC Sierra 2500 HD, Cadillac Escalade, Buick Rainier, Hummer H3, and Saab 9-7x, among others.

About the Motorad Standard Product Line

The Motorad Standard line offers dependable replacement parts that meet or exceed OEM specifications. This product line focuses on providing quality components for engine cooling systems, ensuring proper fit and function. The Standard line balances performance and value, making it suitable for routine maintenance and repairs on compatible GM vehicles.

Common Applications and Issues Addressed

• Prevents engine overheating by regulating coolant flow
• Eliminates coolant leaks with included rubber gasket and O-ring seal
• Reduces air lock issues with jiggle pin weep hole design
• Restores proper engine warm-up time and temperature control
• Replaces faulty or stuck thermostats in Buick, Cadillac, Chevrolet, GMC, Hummer, and Saab models

Installation Notes and Tips

• Ensure the engine is cool before removing the old thermostat
• Clean the thermostat housing surface thoroughly before installation
• Verify the gasket is properly seated to prevent leaks
• No special installation tool is included; standard hand tools are sufficient
• Check coolant levels and bleed the cooling system after installation to remove air pockets

Quality Assurance and Warranty

Motorad Standard thermostats are manufactured to meet strict quality standards for durability and performance. This thermostat includes a rubber gasket and O-ring seal to ensure a reliable, leak-free installation. While specific warranty details are not provided, Motorad products typically come with manufacturer-backed quality assurance to support proper function in compatible vehicles.