Motorad 991-189 Engine Coolant Thermostat Housing Assembly

Overview of Motorad Integrated Housing Thermostat 991-189

The Motorad Integrated Housing Thermostat 991-189 is designed specifically for Jeep Grand Cherokee models, providing reliable engine temperature regulation. This engine coolant thermostat housing assembly combines durable materials and precise engineering to maintain optimal engine performance.

• Constructed from aluminum, steel, and copper for durability and heat resistance
• Includes a rubber O-ring gasket for a secure, leak-free seal
• Features a bleeder hole to prevent air pockets in the cooling system
• Bypass diameter of 1.43 inches and bypass length of 1.08 inches for proper coolant flow
• Single outlet port with a diameter of 1.66 inches
• Operates at a temperature of 189 degrees Fahrenheit
• Three bolt holes for secure mounting
• Gasket included, but mounting hardware and installation tools are not included

About the Integrated Housing Thermostat Product Line

The Motorad Integrated Housing Thermostat line focuses on combining the thermostat and housing into a single assembly, simplifying installation and improving reliability. This design reduces potential leak points and ensures consistent engine temperature control. The 991-189 part is a regular grade type, suitable for standard cooling system requirements in Jeep Grand Cherokee vehicles.

Detailed Product Description

This engine coolant thermostat housing assembly is engineered to meet the specific cooling system needs of Jeep Grand Cherokee models. The combination of aluminum, steel, and copper materials offers strength and corrosion resistance, essential for long-term durability. The included rubber O-ring gasket ensures a tight seal between the housing and engine block, minimizing the risk of coolant leaks. The bleeder hole allows trapped air to escape, preventing overheating and maintaining efficient coolant circulation. With a thermostat opening temperature of 189 degrees Fahrenheit, this part helps regulate engine temperature effectively under normal operating conditions.

Common Applications and Problem Solving

• Replacement for faulty or leaking thermostat housings in Jeep Grand Cherokee cooling systems
• Prevents engine overheating caused by thermostat failure
• Eliminates coolant leaks due to worn or damaged seals
• Addresses air pockets in the cooling system through the bleeder hole
• Restores proper coolant bypass flow to maintain engine temperature stability

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Use the included rubber O-ring gasket for proper sealing; do not reuse old gaskets
• Torque the three mounting bolts evenly to manufacturer specifications to prevent leaks
• Bleed the cooling system after installation to remove trapped air
• Note that mounting hardware and installation tools are not included and must be sourced separately

Quality Assurance and Warranty

The Motorad Integrated Housing Thermostat 991-189 is manufactured to meet OEM standards for fit and function on Jeep Grand Cherokee vehicles. The use of high-quality materials such as aluminum, steel, and copper ensures durability and corrosion resistance. This part includes a rubber O-ring gasket to maintain a secure seal. Warranty information is provided by the manufacturer and should be verified at the time of purchase.