Dayco 70846 Radiator Coolant Hose

Curved Radiator Hose for OE-Style Cooling Service

Dayco 70846 is a curved radiator coolant hose built for cooling system service where a formed EPDM hose is needed to route coolant cleanly between the engine and pipe connections. It is a black, single I.D. hose with 1 1/4-inch inside diameter at both ends, made to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications.

The Dayco Curved Radiator Hose line focuses on shaped replacement hoses that follow factory-style routing. For applications such as Land Rover LR3, Range Rover Sport, Audi A4 Quattro, and Toyota Pickup cooling repairs, the formed profile helps match the original hose path without unnecessary stress on the cooling system.

• Brand: Dayco
• Part number: 70846
• Material: EPDM rubber for coolant hose service
• Black curved radiator hose with a single I.D. hose design
• 1 1/4-inch inside diameter at both ends
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC standards
• Fits multiple upper and lower radiator hose applications across import and domestic vehicles

Fitment and Application Details

• Fits 2005-2009 Land Rover LR3, upper - engine to pipe.
• Fits 2006-2009 Land Rover Range Rover Sport, upper - engine to pipe.
• Fits 2002-2006 Audi A4 Quattro, lower - pipe to engine; hose must be cut on both ends.
• Fits 2002-2005 Audi A4, lower - pipe to engine; hose must be cut on both ends.
• Fits 2002-2004 Audi A6, lower - pipe to engine.
• Fits 2002-2004 Audi A6 Quattro, lower - pipe to engine.
• Fits 1999-2003 Chevrolet Tracker, upper.
• Fits 1999-2002 Suzuki Vitara, upper.
• Fits 1980-1987 Toyota Pickup, upper.
• Fits 1980-1983 Toyota Celica, upper.

This part cross-references ACDelco 20064S and Gates 20774 for the same application.

What This Hose Helps Address

• Coolant leaks from a cracked, swollen, or aged radiator hose
• Restricted coolant flow caused by hose collapse or internal deterioration
• Improper hose routing after a cooling system repair
• Heat-related hose hardening in high-mileage vehicles
• Replacement needs for upper or lower radiator hose service on select Audi, Land Rover, Toyota, Suzuki, and Chevrolet models

Installation Notes and Tips

Verify the hose path, end diameters, and position before installation. Some listed Audi applications require the hose to be cut on both ends, so compare the replacement to the original hose length and routing before trimming. Inspect clamps, pipe ends, and nearby cooling components for wear or corrosion before reassembly.

Confirm vehicle-specific fitment for your exact year, make, model, and hose position, including upper, lower, engine-to-pipe, pipe-to-engine, thermostat-to-tee, or water-pump-to-pipe routing. Dayco 70846 is intended for direct cooling system hose replacement where the listed dimensions and application match.

Quality Assurance

Dayco manufactures cooling hoses to meet published SAE material and performance specifications, including SAE J20R4 Class D-1 and SAE J1684 Type EC for this part. The EPDM construction supports coolant-system service in the listed applications.