Gates 21656 Radiator Coolant Hose - Upper

Overview of Gates Molded Coolant Hose 21656

The Gates Molded Coolant Hose 21656 is designed specifically for BMW 735i models, providing reliable radiator coolant flow. Constructed from durable EPDM material, this molded hose ensures consistent performance and resistance to heat and chemicals.

• Material: EPDM for heat and chemical resistance
• End 1 Inside Diameter: 1.62 inches (41 mm)
• End 2 Inside Diameter: 1.75 inches (44 mm)
• Centerline Length: 16.3 inches (414 mm)
• Molded design for precise fit and durability
• No spring reinforcement included
• Compatible with BMW 735i radiator coolant systems

Details on the Molded Coolant Hose Product Line

The Gates Molded Coolant Hose line focuses on precision-molded hoses engineered to meet exact OEM specifications. This product line emphasizes durability and fitment accuracy, reducing the risk of leaks and premature failure. The molded construction of part number 21656 ensures a secure connection within the cooling system of the BMW 735i, maintaining optimal coolant flow and system integrity.

Technical Description of Part Number 21656

This radiator coolant hose features EPDM material known for its resistance to high temperatures, ozone, and automotive fluids. The hose has two different inside diameters at each end—1.62 inches (41 mm) and 1.75 inches (44 mm)—to accommodate specific radiator and engine connections. With a centerline length of 16.3 inches (414 mm), the molded hose fits precisely within the BMW 735i cooling system layout. The absence of spring reinforcement and quick connect fittings indicates a straightforward installation with a focus on durability and OEM compatibility.

Common Applications and Problem Solving

• Replacement of worn or cracked radiator coolant hoses in BMW 735i vehicles
• Prevention of coolant leaks caused by hose degradation
• Restoration of proper coolant flow to avoid engine overheating
• Addressing hose swelling or softening due to heat exposure
• Ensuring secure connections without the need for additional fittings

Installation Notes and Tips

When installing the Gates Molded Coolant Hose 21656, ensure the engine is cool to prevent injury from hot coolant. Verify the hose orientation matches the original part, noting the different inside diameters at each end. Use appropriate clamps to secure the hose firmly without over-tightening, which could damage the EPDM material. Inspect surrounding components for wear or damage during installation to maintain overall cooling system integrity.

Quality Assurance and Warranty

Gates manufactures the Molded Coolant Hose 21656 to meet stringent quality standards, ensuring reliable performance in BMW 735i cooling systems. The EPDM construction provides resistance to heat and automotive fluids, contributing to long service life. While specific warranty details are not provided, Gates products typically adhere to industry standards for durability and fitment accuracy.