Dayco Coolant Hoses

Branded Radiator Hose

Dayco Branded Radiator Hose

Designed as an aftermarket replacement for OEM manufactured branched cooling system hoses.

The Dayco branched radiator hose features an all EPDM construction that resists the effects of oil, mud, salt and ozone, and a knitted rayon reinforced inner tube that stands up to temperature ranges of -40˚F (-40˚C) to +257˚F (+125˚C). With leak-proof junctions that ensure long service life and unrestricted flow, this branched hose meets SAE J20R4, Class D-1, Type EC electro-chemical requirements as specified in SAE J1684.

Brass Heater Hose Connectors

Dayco Brass Heater Hose Connectors

Engineered for cooling system applications that call for brass connections.

Made of high-quality brass to withstand high or extreme maybe engine temperatures, high clamping pressure and a corrosive environment, Dayco’s brass heater hose connector is designed with raised ribs that help to lock the hose to the connector and improve the seal. Available to fit  ¼", ⅜", ½" and ⅝" hose I.D.s. This connector is compatible with all traditional engine coolants.

Flex Radiator Hose

Dayco Flex Radiator Hose

Designed to replace straight or molded radiator hoses on a wide range of engine applications.

Precision molded in standard lengths, the Dayco flex radiator hose features a knitted reinforcement and synthetic EPDM construction that meets SAE J20R4, Class D-2 requirements.  This hose is designed to prevent splitting, ballooning and elongation as well as resists ozone and other detrimental environmental elements, coolants and temperature variations of -40°F (-40°C) to +257°F (+125°C). With corrugations that provide excellent hose flexibility without flattening or collapsing, the Dayco flex radiator hose also features a helical steel coil spring for increased flexibility.
*NOT suitable for fuel or oil transfer.

Heater Hose Packaged 6-Foot

Dayco Heater Hose Packaged 6-Foot

Designed to hang on standard pegboard hooks for retail displays and self-service stations.

This pack contains each of the three most popular Dayco heater hose sizes – ½", ⅝", ¾" – packaged in 6' lengths in a poly bag that measures 12" wide x 17" high. Ships 10 bags per standard case.

*NOT suitable for fuel or oil transfer.

Insulone® Heater Hose

Dayco Insulone® Heater Hose

Designed for use in cold climate applications where efficient heat transfer is important for comfortable and cost-effective vehicle operation.

The premium Dayco Insulone® heater hose delivers heated coolant to the heater core with minimal heat loss. The synthetic EPDM rubber compounds and spiral reinforcement give this hose excellent burst strength, resistance to heat and compatibility with all common coolants and coolant additives. A special compound used in the insulating layer provides an added measure of protection against heat loss. Built with a black cover, this hose meets SAE 20R3, Class D-2 with a temperature range of -40°F (-40°C) to +257°F (+125°C).

*NOT suitable for fuel or oil transfer

Molded Radiator and By-Pass Hose

Dayco Molded Radiator and By-Pass Hose

Designed to replace OEM hoses on today’s light duty vehicles for superior performance.

The Dayco molded radiator and by-pass hose features knitted reinforcement, a protective sleeve and a synthetic EPDM rubber construction for high strength performance, protection against abrasion and resistance to oil, mud, salt, road debris, ozone and coolants. It can also withstand temperature variations of -40°F (-40°C) to +257°F (+125°C). The inner base tube is reinforced with knitted rayon for maximum strength and burst resistance for the life of the hose. In addition to meeting SAE J20R4, Class D-1 requirements, this hose also meets Type EC electro-chemical requirements as specified in SAE J1684, which prevents inner tube deterioration caused by the build-up of static electric charges.

Molded Heater Hose

Dayco Molded Heater Hose

Made with the same bends and routing as the OEM assembly, this hose is designed to fit the vehicle precisely as an OEM replacement.

The Dayco molded heater hose is constructed with knitted reinforcement and synthetic EPDM compounds for high strength performance and resistance to detrimental environmental elements, coolants and temperature variations of -40°F (-40°C) to +257°F (+125°C). In addition to meeting SAE J20R4, Class D-1 requirements, this hose is designed to meet Type EC electro-chemical requirements as specified in SAE J1684.  With a “quick connect” end (where applicable) assembled onto the hose for fast, convenient installation, you can avoid the hassle of buying a separate connector and clamp.

Plastic Heater Hose Connectors

Dayco Plastic Heater Hose Connectors

Designed for making various replacement heater hose configurations, accommodating ¼", ⅜", ½", ⅝" and ¾" hose I.D.s. and compatible with all traditional coolants and fuels.

These glass-filled nylon connectors feature a unique barbed end profile to ensure a leak-proof seal and anti-rotation ribs molded directly into the connector to prevent hose rotation and twisting. A circumferential flange provides a hose stop that ensures the hose is inserted to the proper depth. Dayco plastic heater hose connectors are available in straight, “Y”, elbow, tee and reducing configurations.

Small I.D. Molded Heater Hose

Dayco Small I.D. Molded Heater Hose

Designed to replace OEM coolant hose and provide long, reliable service in applications where molded hoses in small diameters are required.

Made with the same bends and routing as the OEM assembly, this molded hose is designed to fit the vehicle precisely. The knitted reinforcement and synthetic EPDM construction provide high strength performance and resistance to detrimental environmental elements, coolants and temperature variations of -40°F (-40°C) to +257°F (+125°C) and the “quick connect” end allows for fast, convenient installation. In addition to meeting SAE J20R3, Class D-1 requirements, the Dayco small I.D. molded heater hose is designed to meet Type EC electro-chemical requirements as specified in SAE J1684.

Special Reducer

Dayco Special Reducer

Designed to reduce the inside diameters of larger hoses for emergency replacements in coolant or air applications.

These molded rubber Dayco special reducers slip into the end of straight radiator hoses to reduce the I.D. of existing straight, molded and flex hoses to help provide a tight, leak proof connection.

*NOT suitable for fuel or oil transfer

Standard Heater Hose

Dayco Standard Heater Hose

Made for general service on light trucks and passenger cars and compatible with all common coolants and coolant additives.

Designed to carry heated coolant from the engine block to the heater core and return it to the engine, the Dayco standard heater hose is constructed with EPDM compounds and a spiral reinforcement for high burst strength and excellent heat resistance. Similar to SAE 20R3, Class D-2, it has a temperature rating of -40°F (-40°C) to +257°F (+125°C).

*NOT suitable for fuel or oil transfer

Straight Radiator Hose

Dayco Straight Radiator Hose

Designed for a wide range of light vehicle applications where the radiator hose routing is relatively straight.

The Dayco straight radiator hose features knitted reinforcement and synthetic EPDM rubber construction. It meets SAE J20R4, Class D-2 requirements and provides high strength performance and resistance to detrimental environmental elements, such as ozone, coolants and temperature variations from -40°F (-40°C) to +257°F (+125°C).

*NOT suitable for fuel or oil transfer.

90° Molded Coolant Hose

Dayco 90° Molded Coolant Hose

Designed for vehicles that require special heater hoses with a molded 90° elbow to fit tight engine compartment routings. Multiple 90° hoses can be used with Dayco plastic connectors to fit complex routings.

The Dayco 90° molded coolant hose features knitted reinforcement and EPDM compounds for high strength construction and resistance to oil, mud, salt, road debris, ozone, coolants and temperature variations of -40°F (-40°C) to +257°F (+125°C).  The inner base tube is reinforced with knitted rayon for maximum strength and burst resistance for the life of the hose. In addition to meeting SAE J20R4, Class D-1 requirements, this hose meets Type EC electro-chemical requirements as specified in SAE J1684.

Gold Label® Heavy Duty Flex Radiator Hose

Dayco Gold Label® Heavy Duty Flex Radiator Hose

Designed to replace molded or curved radiator hoses in today’s heavy duty vehicle applications.

Dayco’s Gold Label® heavy duty flex radiator hose is hand-built with neoprene rubber, heavy duty fabric and an embedded wire reinforcement for high burst strength and collapse resistance. With a corrugated ribbing that provides excellent flexibility while helping prevent kinks, the hose’s heavy duty construction stands up to detrimental environmental elements, such as ozone, coolants, coolant additives and temperature variations of -40°F (-40°C) to +212°F (+100°C). This hose meets or exceeds SAE J20R5, Class C requirements for heavy duty applications.

*NOT suitable for fuel or oil transfer.

Gold Label® Heavy Duty Heater Hose

Dayco Gold Label® Heavy Duty Heater Hose

Designed for heavy duty and off-road equipment service.

Dayco Gold Label® heavy duty heater hoses are made with the highest quality EPDM compounds and heavy duty spiral reinforcement to withstand high coolant and under-hood temperatures of -40°F (-40°C) to +257°F (+125°C). This hose exceeds SAE 20R3, Class D-1 standard wall construction requirements as well as Type EC electro-chemical requirements.

*NOT suitable for fuel or oil transfer.

Gold Label® Heavy Duty Silicone Heater Hose

Dayco Gold Label® Heavy Duty Silicone Heater Hose

Designed to extend the service life for heavy duty and off-road equipment applications.

The Dayco Gold Label® silicone heater hose is engineered to resist aging caused by heat, chemicals, oils and other elements. Made with special silicone compounds and reinforced with a ply of braided polyester yarn, this hose sustains up to six times longer service life than an ordinary coolant hose when installed with a Dayco lined hose clamp. In addition to being extremely flexible, the Dayco Gold Label silicone heater hose meets the requirements of SAE 20R3, Class A and has a temperature rating of -40°F (-40°C) to +350°F (+175°C).

*NOT suitable for fuel or oil transfer.

Gold Label® Heavy Duty Straight Radiator Hose

Dayco Gold Label® Heavy Duty Straight Radiator Hose

Designed for a wide range of heavy duty truck applications where the routing is relatively straight.

The Dayco Gold Label® heavy duty straight radiator hose is made with the highest quality woven mesh fabric reinforcement, neoprene cover and nitrile tube compounds to withstand the most corrosive elements in diesel engines. Providing protection from oil, coolants, coolant additives and heat, with a temperature rating of -40˚F (-40˚C) to +212˚F (+100˚C), this hose meets SAE requirements J20R1, Class B Tube, Class C Cover, standard wall construction.

*NOT suitable for fuel or oil transfer.

Gold Label® Heavy Duty Quick Fit Radiator Hose

Dayco Gold Label® Heavy Duty Quick Fit Radiator Hose

Designed to be used in commercial vehicle applications with multiple and/or small radius bends that would cause regular straight hose to kink or collapse.

Dayco’s Gold Label® heavy duty quick fit radiator hose features one ply of fabric reinforcement over a fully embedded helical steel wire for increased strength and superior collapse resistance. Developed to withstand the harshest environments found in heavy duty over-the-road and off-road applications, the cover is made with the highest quality neoprene. This hose meets the requirements for SAE J20R2, Class B Tube, Class C Cover, standard wall construction. It can also withstand temperatures from -40°F (-40°C) to +212°F (+100°C).

*NOT suitable for fuel or oil transfer.