Dayco 70158 Radiator Coolant Hose

Dayco Curved Radiator Hose 70158

Dayco 70158 is a curved radiator coolant hose built for cooling-system service where a formed EPDM hose is required. It uses a 1 1/4 in. inside diameter at both ends and follows SAE J20R4 Class D-1 and SAE J1684 Type EC specifications for the listed applications.

This Dayco Curved Radiator Hose line is shaped for direct routing in the engine bay, helping maintain proper coolant flow between the radiator and tee connections. The black EPDM construction is suited to radiator hose service in a range of Volkswagen, Audi, and Chrysler applications.

Key Features

• Part number: 70158
• Curved radiator coolant hose for cooling-system routing
• EPDM construction with black finish
• 1 1/4 in. inside diameter at both ends
• Single I.D. hose design
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• No heat shield and no protective sleeve

Application Details

Compatible with select Audi A3, Audi A3 Quattro, Audi TT Quattro, Audi TT, Volkswagen GTI, Volkswagen Eos, Volkswagen Passat, Volkswagen Golf, Volkswagen Jetta, and Chrysler Imperial, New Yorker, Newport, and Town & Country applications. Fits 2009 Audi A3, Lower - Radiator To Tee; Fits 2006-2009 Audi A3 Quattro, Lower - Radiator To Tee; Fits 2008-2009 Volkswagen GTI, Lower - Tee To Radiator; Fits 2008 Audi TT Quattro, Lower - Radiator To Tee; Fits 2007-2008 Volkswagen Eos, Lower - Radiator To Tee; Fits 2006-2008 Volkswagen Passat, Upper - Radiator To Tee; Fits 2000-2006 Volkswagen Golf, Upper - Tee-1 To Tee-2; Fits 2002-2005 Volkswagen Jetta, Upper - Tee-1 To Tee-2; Fits 2004 Audi TT, Upper - Tee-1 To Tee-2; Fits 2000-2003 Volkswagen Golf, Lower - Radiator To Tee; Fits 1999-2003 Volkswagen Jetta, Lower - Radiator To Tee; Fits 1952-1954 Chrysler Imperial, N/A; Fits 1951-1954 Chrysler New Yorker, N/A; Fits 1952-1953 Chrysler Newport, N/A; Fits 1952-1953 Chrysler Town & Country, N/A.

This part cross-references ACDelco 20260S and Gates 21259 for the same application.

What This Hose Helps Address

• Cracked or hardened radiator hose material
• Coolant leaks at a formed hose section
• Incorrect hose routing in a curved cooling-system run
• Replacement needs for aging OE-style coolant hoses
• Service on radiator-to-tee or tee-to-radiator connections

Installation Notes and Tips

Verify the hose path, end diameters, and position before installation. Match the application exactly, since this part is listed for multiple positions including lower radiator to tee, lower tee to radiator, upper radiator to tee, and upper tee-1 to tee-2. Inspect adjoining clamps, tees, and pipe ends for wear or corrosion before installing the new hose.

Quality Assurance

Dayco manufactures this hose to meet the listed SAE specifications for the confirmed applications. The EPDM construction and formed shape support consistent fitment in the specified Audi, Volkswagen, and Chrysler cooling-system layouts.