Dayco 87739 HVAC Heater Hose - Heater Outlet

Overview of Dayco Small I.D. Heater Hose 87739

The Dayco Small I.D. Heater Hose 87739 is designed for reliable HVAC system performance in select Chevrolet, GMC, Isuzu, and Oldsmobile vehicles. This heater hose ensures proper coolant flow within the heating system, maintaining cabin comfort and engine efficiency.

• Constructed from durable EPDM material for heat and chemical resistance
• Black single inside diameter hose with 5/8 inch diameter on both ends
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Trunk height of 13 1/2 inches for precise fitment
• Compatible with Chevrolet Blazer, GMC Jimmy, Isuzu Hombre, Oldsmobile Bravada, and S10/Sonoma models

Dayco Small I.D. Heater Hose Product Line Details

The Small I.D. Heater Hose line by Dayco focuses on single inside diameter hoses engineered to meet stringent SAE standards. These hoses are designed to provide consistent coolant flow and withstand the thermal demands of vehicle heating systems. The 87739 part exemplifies this line with its EPDM construction and exacting dimensional specifications, ensuring compatibility and durability in HVAC applications.

Detailed Product Description

This HVAC heater hose features a 5/8 inch inside diameter on both ends, making it suitable for specific heater core and engine connections. The EPDM material offers resistance to heat, ozone, and coolant chemicals, which helps maintain hose integrity over time. The hose does not include a heat shield or protective sleeve, reflecting its design for standard HVAC system environments. Its 13 1/2 inch trunk height dimension supports proper routing and fitment in the designated vehicle models.

Common Applications and Problem Solving

• Replacement of cracked or leaking heater hoses in Chevrolet Blazer and GMC Jimmy HVAC systems
• Resolving coolant leaks causing insufficient cabin heating in Isuzu Hombre and Oldsmobile Bravada
• Addressing hose deterioration due to age or exposure in Chevrolet S10 and GMC Sonoma models
• Ensuring proper coolant flow to prevent engine overheating related to heater core connections

Installation Notes and Tips

• Verify hose length and diameter compatibility with your vehicle’s HVAC system before installation
• Ensure all clamps are securely tightened to prevent coolant leaks
• Inspect surrounding components for wear or damage during replacement
• Flush the cooling system if contamination or debris is present before installing the new hose

Quality Assurance and Warranty

Dayco Small I.D. Heater Hose 87739 is manufactured to meet SAE J20R3 Class D-1 and SAE J1684 Type EC standards, ensuring reliable performance under typical operating conditions. The EPDM construction provides durability against heat and chemical exposure. Warranty details should be confirmed with the original equipment provider or distributor.