Dayco 71745 Radiator Coolant Hose - Lower

Dayco Curved Radiator Hose 71745

Dayco 71745 is a curved radiator coolant hose built for lower cooling-system routing on select Honda and Isuzu applications. Made from EPDM and finished in black, it provides a direct-fit replacement for vehicles that need a 1 15/32 in. inside diameter at both ends.

This Dayco Curved Radiator Hose line focuses on OE-style cooling system service parts with the correct shape and material for demanding underhood temperatures. The 71745 hose follows SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for radiator coolant hose applications.

Key Features

• EPDM construction for coolant hose service
• Black finish for a factory-style appearance
• Single I.D. hose design
• 1 15/32 in. inside diameter at both ends
• Curved radiator hose profile for lower routing
• Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• No heat shield and no protective sleeve

Application Details

Dayco 71745 is a lower radiator coolant hose for 1999 Isuzu VehiCROSS, 1994-1997 Honda Passport, and 1993-1997 Isuzu Rodeo. It is a direct replacement for lower hose routing where the curved shape and matching end diameters are required. Search terms such as lower radiator hose for 1994-1997 Honda Passport or curved coolant hose for 1993-1997 Isuzu Rodeo apply to this part.

This part cross-references Gates 21972 and NAPA 8662 for the same application. The Dayco 71745 part number is also used in interchange listings for ACDelco 26212X, CARQUEST 21972, Duralast E71745, Freshstart 1000, Goodyear 62049, and Isuzu 8-97072-935-0.

What It Helps Address

• Cracked or split lower radiator hose
• Coolant leaks at the hose connection points
• Softening or swelling from age and heat exposure
• Incorrect hose shape on lower cooling-system routing
• Restricted coolant flow caused by deteriorated hose material

Installation Notes

Verify the hose routing, end diameters, and vehicle build date before installation. This hose is listed for 1999 Isuzu VehiCROSS built before 2/1/99, plus 1994-1997 Honda Passport and 1993-1997 Isuzu Rodeo lower radiator hose applications. Inspect clamps, mating necks, and surrounding cooling-system components during service, and replace any worn parts as needed.

Quality Assurance

Dayco manufactures this radiator coolant hose to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and dimensional requirements for cooling-system replacement work.