Dayco 87855 HVAC Heater Hose

Overview of Dayco Small I.D. Heater Hose 87855

The Dayco Small I.D. Heater Hose 87855 is designed for reliable HVAC system performance in select Chrysler, Dodge, Ford, and Toyota vehicles. Engineered with durable EPDM material, this hose supports efficient heater core operation in models like the Toyota 4Runner, Ford Expedition, Dodge Pickup, and Chrysler Sebring.

• Constructed from high-quality EPDM for heat and ozone resistance
• Dual inside diameter hose with 5/8 inch and 3/4 inch ends
• Black color for standard OEM appearance
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Compatible with Chrysler, Dodge, Ford, and Toyota HVAC systems

Detailed Product Description

The Dayco Small I.D. Heater Hose part number 87855 is a dual inside diameter hose designed to connect different sized fittings within the HVAC heater system. Its EPDM construction provides excellent resistance to heat, coolant, and environmental factors, ensuring long service life. The hose features a 5/8 inch inside diameter on one end and a 3/4 inch inside diameter on the other, with corresponding outside diameters of 15/16 inch and 1 1/16 inch respectively. This design supports a secure fit and proper coolant flow in heater core circuits.

The Small I.D. Heater Hose product line from Dayco focuses on delivering precise fitment and material quality for HVAC applications requiring varied hose diameters. This line is engineered to meet SAE J20R3 Class D-1 and SAE J1684 Type EC standards, ensuring compatibility and durability in demanding automotive environments.

Common Applications and Problem Solving

• Replacement of worn or cracked heater hoses in Toyota 4Runner and Ford Expedition HVAC systems
• Resolving coolant leaks caused by hose degradation in Dodge Pickup and Chrysler Sebring models
• Maintaining proper heater core coolant flow for consistent cabin heating
• Addressing hose fitment issues due to mismatched diameters in HVAC plumbing
• Preventing premature hose failure from heat and ozone exposure

Installation Notes and Tips

• Verify hose diameters and length before installation to ensure proper fit
• Inspect surrounding components for wear or damage during replacement
• Use appropriate clamps to secure hose ends and prevent leaks
• Ensure coolant system is depressurized and cooled before removal
• Flush heater core and coolant system if contamination is suspected

Quality Assurance and Warranty

Dayco manufactures the Small I.D. Heater Hose 87855 to meet stringent SAE specifications, including J20R3 Class D-1 and J1684 Type EC, ensuring reliable performance in automotive HVAC systems. The EPDM material offers resistance to heat, ozone, and coolant chemicals, contributing to extended hose life. While specific warranty details are not provided, Dayco products typically adhere to industry standards for quality and durability.