Dayco 87678 HVAC Heater Hose

Reliable HVAC Heater Hose for Acura, Buick, Chevrolet, and More

The Dayco Small I.D. Heater Hose 87678 is designed to provide dependable performance in your vehicle's heating system. Engineered with durable EPDM material, this hose ensures consistent heat transfer and resistance to automotive fluids.

• Constructed from high-quality EPDM for heat and chemical resistance
• Black single inside diameter hose with 5/8 inch ID on both ends
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Compatible with multiple makes including Acura, Buick, Chevrolet, Mercury, Oldsmobile, Pontiac, and Toyota
• Part number 87678 for precise identification and fitment

Durable Construction and Brand Line Details

The Small I.D. Heater Hose line from Dayco focuses on providing hoses with smaller inside diameters suitable for specific HVAC applications. This hose features a single inside diameter design, measuring 5/8 inch on both ends, which simplifies installation and ensures a secure fit. The EPDM material offers excellent resistance to heat, ozone, and coolant chemicals, making it a reliable choice for maintaining your vehicle’s heating system integrity.

Applications and Common Issues Addressed

• Replacement of worn or cracked heater hoses in Acura CL and Toyota Tercel models
• Resolving coolant leaks in Buick Century and Chevrolet Celebrity heating systems
• Addressing heater core flow problems in Mercury Capri and Oldsmobile Cutlass Ciera vehicles
• Preventing overheating caused by damaged or deteriorated heater hoses in Pontiac models
• Maintaining proper HVAC function in vehicles requiring SAE J20R3 Class D-1 compliant hoses

Installation Notes and Tips

Ensure the engine is cool before removing the old heater hose to avoid burns. Verify the hose diameter matches the original equipment specifications—this hose has a 5/8 inch inside diameter on both ends. Inspect hose clamps and replace if necessary to secure the new hose properly. The single inside diameter design simplifies alignment during installation.

Quality Assurance and Specifications

Dayco’s Small I.D. Heater Hose 87678 complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, ensuring it meets industry requirements for durability and performance. Manufactured from EPDM material, this hose resists heat, ozone, and automotive fluids, contributing to long service life. While no specific warranty information is provided, Dayco products are known for meeting OEM quality standards.