Dayco 71243 Radiator Coolant Hose - Lower

Overview of Dayco Curved Radiator Hose 71243

The Dayco Curved Radiator Hose 71243 is designed specifically for Chevrolet and GMC models including the S10, S10 Blazer, S15, S15 Jimmy, and Sonoma. Engineered with durable EPDM material, this dual inside diameter hose ensures reliable coolant flow and heat resistance for your vehicle's cooling system.

• Constructed from high-quality EPDM material for heat and chemical resistance
• Dual inside diameters: 1 1/2 inch and 1 3/4 inch ends for precise fitment
• Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Black color for standard OEM appearance
• Trunk height of 15 3/4 inches to match original equipment dimensions

Dayco Curved Radiator Hose Product Line Details

The Curved Radiator Hose line by Dayco focuses on delivering hoses that match the original equipment specifications for curvature and diameter, ensuring proper coolant flow and fitment. This product line is engineered to meet stringent SAE standards, providing durability and compatibility with specific vehicle models such as Chevrolet S10 and GMC Sonoma. The 71243 part number represents a dual inside diameter hose designed to replace factory hoses without modification.

Detailed Product Description

The Dayco 71243 radiator coolant hose is manufactured from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals. This hose features a dual inside diameter design with one end measuring 1 1/2 inches and the other 1 3/4 inches, allowing it to connect different sized fittings securely. The hose does not include a heat shield or protective sleeve, consistent with many OEM radiator hoses. Its trunk height of 15 3/4 inches ensures it fits the routing path in Chevrolet and GMC trucks and SUVs without interference.

Common Applications and Issues Addressed

• Replacement of worn or cracked radiator coolant hoses on Chevrolet S10 and GMC S15 models
• Resolving coolant leaks caused by hose degradation or swelling
• Maintaining proper coolant flow to prevent engine overheating
• Restoring OEM fitment and preventing hose collapse under pressure
• Addressing hose failure due to exposure to heat and chemicals in the cooling system

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 71243, ensure the vehicle is cool and the cooling system is depressurized. Verify the hose orientation matches the original routing to avoid kinks or stress points. Use appropriate clamps to secure both ends, matching the 1 1/2 inch and 1 3/4 inch diameters. Inspect adjacent components for wear or damage during installation to maintain system integrity.

Quality Assurance and Warranty

Dayco manufactures the 71243 radiator hose to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for coolant hoses. The EPDM material and construction provide durability under typical operating conditions. Warranty details should be confirmed with the original equipment manufacturer or supplier, as Dayco products generally come with limited warranties covering defects in material and workmanship.