Motorad 538-187 Engine Coolant Thermostat Housing Assembly

Overview of Motorad Integrated Housing Thermostat 538-187

The Motorad Integrated Housing Thermostat 538-187 is engineered for reliable engine temperature regulation in select Chevrolet, GMC, Hummer, and Isuzu vehicles. Designed to maintain optimal coolant flow, this thermostat housing assembly supports efficient engine performance and helps prevent overheating.

• Integrated thermostat housing assembly with bleeder hole for air removal
• Constructed from durable aluminum, stainless steel, and copper materials
• Includes a rubber gasket/seal for secure, leak-free installation
• Features a jiggle pin to aid in proper coolant circulation
• Designed with two bolt holes and one outlet port (1.59 inch diameter)
• Thermostat opens at 187°F to regulate engine temperature effectively

Product Line: Motorad Integrated Housing Thermostat

The Motorad Integrated Housing Thermostat product line combines the thermostat and housing into a single assembly, simplifying installation and improving reliability. This design reduces potential leak points by integrating the thermostat directly within the housing, which is constructed from a combination of aluminum, stainless steel, and copper for enhanced durability. The inclusion of a bleeder hole and jiggle pin supports efficient coolant flow and air removal, critical for maintaining consistent engine temperatures.

Detailed Product Description

Part number 538-187 is an engine coolant thermostat housing assembly specifically designed for Chevrolet Canyon and Colorado, GMC Canyon and Colorado, Hummer H3 and H3T, and Isuzu i-280, i-290, i-350, and i-370 models. The assembly features a silver finish and includes a rubber gasket to ensure a tight seal between the housing and engine block. It has two bolt holes for secure mounting but does not include bolts or additional hardware. The thermostat integrated within the housing opens at 187 degrees Fahrenheit, allowing coolant to flow through the single outlet port with a diameter of 1.59 inches. The bleeder hole and jiggle pin facilitate the removal of trapped air, which helps prevent overheating and maintains consistent engine temperature control.

Common Applications and Issues Addressed

• Prevents engine overheating by regulating coolant flow
• Eliminates coolant leaks caused by worn or damaged thermostat housings
• Resolves inconsistent engine temperature readings due to faulty thermostat operation
• Helps maintain proper engine warm-up times for improved fuel efficiency
• Addresses coolant circulation problems in Chevrolet, GMC, Hummer, and Isuzu vehicles

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Use the included rubber gasket to create a proper seal and prevent leaks
• Torque bolts evenly to manufacturer specifications; bolts are not included
• Bleed the cooling system after installation to remove trapped air via the bleeder hole
• Verify thermostat opening temperature matches vehicle requirements (187°F)

Quality Assurance and Warranty

The Motorad Integrated Housing Thermostat 538-187 is manufactured with high-quality materials including aluminum, stainless steel, and copper to ensure durability and corrosion resistance. The integrated design reduces potential failure points compared to separate thermostat and housing units. This part includes a rubber gasket for sealing but does not come with mounting hardware or installation tools. Warranty information should be confirmed with the parts distributor or manufacturer, as it may vary by source.