Dayco 87749 HVAC Heater Hose - Heater To Pipe or Pipe To Engine

Overview of Dayco Small I.D. Heater Hose 87749

The Dayco Small I.D. Heater Hose 87749 is designed for reliable HVAC system performance in select Acura, Honda, Isuzu, and Toyota vehicles. Engineered with durable EPDM material and a dual inside diameter design, this hose supports efficient heater core fluid flow in models like the Toyota 4Runner and Honda Passport.

• Constructed from high-quality EPDM for heat and chemical resistance
• Dual inside diameters: 5/8 inch and 3/4 inch ends for versatile fitment
• Includes a protective sleeve to guard against abrasion
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Compatible with multiple makes and models including Toyota Tacoma and Isuzu Rodeo

Detailed Product Description

The Dayco Small I.D. Heater Hose 87749 is part of the Small I.D. Heater Hose product line, which focuses on delivering precise fit and durability for HVAC heater hose applications. This hose features a dual inside diameter design, with one end measuring 5/8 inch and the other 3/4 inch, allowing it to connect different sized fittings commonly found in vehicle heating systems. Made from EPDM, the hose offers resistance to heat, ozone, and coolant chemicals, ensuring long service life. The black hose includes a protective sleeve to reduce wear from contact with other engine components, although it does not contain a heat shield. It complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive heater hose use.

Compatible Vehicles and Applications

This heater hose is compatible with a range of Acura, Honda, Isuzu, and Toyota models, including but not limited to:

• Toyota 4Runner and Tacoma
• Honda Passport
• Isuzu Rodeo and Trooper
• Acura SLX
• Isuzu VehiCROSS

It is designed to replace worn or damaged heater hoses in these vehicles, ensuring proper coolant flow to the heater core and maintaining cabin heating performance.

Common Issues Addressed by Dayco 87749 Heater Hose

• Leaking or cracked heater hoses causing coolant loss
• Reduced heater core efficiency due to hose deterioration
• Hose abrasion from engine compartment contact
• Incompatibility with original hose sizes requiring dual I.D. hose
• Failure to meet SAE specifications leading to premature hose failure

Installation Notes and Tips

When installing the Dayco Small I.D. Heater Hose 87749, ensure the correct orientation of the dual inside diameter ends to match the vehicle’s heater core and engine fittings. Inspect surrounding components for wear or damage that could affect hose longevity. Use proper clamps and avoid over-tightening to prevent hose damage. The protective sleeve should be positioned to minimize abrasion points during installation.

Quality Assurance and Warranty

Dayco manufactures the Small I.D. Heater Hose 87749 to meet stringent SAE standards, ensuring reliable performance in automotive HVAC systems. The EPDM material and protective sleeve contribute to durability under typical operating conditions. Warranty details should be confirmed with the original equipment manufacturer or distributor.