Dayco 87006 Engine Coolant Bypass Hose

Dayco Small I.D. Heater Hose for Toyota Cooling Systems

Dayco 87006 is a Small I.D. Heater Hose built for engine coolant bypass service in select Toyota applications. Made from EPDM and finished in black, it uses a single I.D. hose design with 5/16 in. inside diameter at both ends for a direct replacement-style coolant connection.

This hose is part of Dayco’s Small I.D. Heater Hose line, which focuses on compact coolant routing where consistent fit and material durability matter. Dayco 87006 is a practical choice for Toyota Corolla and Toyota Matrix models that use a small-diameter heater or bypass hose in the cooling circuit.

Key Features

• Engine coolant bypass hose for small-diameter heater hose routing
• EPDM construction for coolant-system use
• 5/16 in. inside diameter at both ends
• 5/8 in. outside diameter at both ends
• Single I.D. hose design
• Black finish
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications

Detailed Description

Dayco 87006 is engineered for coolant transfer in compact heater hose and bypass hose applications. The EPDM rubber construction is suited for engine cooling environments, while the uniform 5/16 in. end dimensions support consistent routing in small I.D. connections. This part cross-references ACDelco 18453L and Gates 18555 for the same application.

Compatible with 2009-2017 Toyota Corolla and 2009-2014 Toyota Matrix, this hose is a direct-fit option for owners searching for a Toyota Corolla heater hose replacement or a Toyota Matrix engine coolant bypass hose. The Dayco 87006 part number is also useful when matching OE-style cooling system service parts by reference.

Common Uses

• Replacing a cracked or aged heater hose
• Restoring coolant flow through a bypass circuit
• Addressing coolant seepage at small-diameter hose connections
• Repairing soft, swollen, or heat-cycled rubber hose sections
• Servicing Toyota Corolla and Toyota Matrix cooling system hose routing

Installation Notes

Verify hose routing, end diameter, and overall length before installation. Match the hose to the vehicle’s existing coolant path and inspect adjoining clamps, fittings, and hard lines for wear or corrosion. After installation, refill and bleed the cooling system according to the vehicle service procedure and check for leaks at operating temperature.

Quality Assurance

Dayco 87006 is built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for heater and coolant hose service. The Dayco Small I.D. Heater Hose line is intended for precise small-diameter cooling connections in Toyota Corolla and Toyota Matrix applications.