Dayco 87954 HVAC Heater Hose - Heater Outlet

Overview of Dayco Small I.D. Heater Hose 87954

The Dayco Small I.D. Heater Hose 87954 is designed for reliable HVAC system performance in select BMW models. Engineered with durable EPDM material and a protective sleeve, this hose ensures efficient coolant flow and long-lasting service in your vehicle's heating system.

• Constructed from high-quality EPDM material for heat and chemical resistance
• Dual inside diameter hose with 11/16 inch and 3/4 inch ends
• Black color with protective sleeve for added durability
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Compatible with multiple BMW models including 1 Series M, 128i, 135i, 323i, 328i, 330i, 335i, 740i, and X1

Dayco Small I.D. Heater Hose Product Line Details

The Small I.D. Heater Hose line by Dayco focuses on providing precise fitment and reliable performance for HVAC systems requiring smaller inside diameter hoses. This product line emphasizes durability and compliance with SAE standards, making it suitable for specific applications such as the BMW models listed. The inclusion of a protective sleeve enhances hose longevity by guarding against abrasion and environmental factors.

Technical Description and Specifications

This HVAC heater hose features a dual inside diameter design, with one end measuring 11/16 inch and the other 3/4 inch inside diameter, both having an outside diameter of 1 3/32 inches. The hose is constructed from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals. The black hose includes a protective sleeve but does not contain a heat shield. It complies with SAE J20R3 Class D-1 and SAE J1684 Type EC standards, ensuring it meets industry requirements for heater hoses.

Applications and Common Issues Addressed

• Replacement of worn or cracked heater hoses in BMW 1 Series M, 128i, 135i, 323i, 328i, 330i, 335i, 740i, and X1 models
• Resolving coolant leaks within the HVAC heating system
• Preventing overheating caused by restricted or damaged heater hoses
• Maintaining proper heater core function and cabin heating efficiency
• Addressing hose deterioration due to exposure to heat and chemicals

Installation Notes and Tips

Ensure the engine is cool before beginning installation to avoid burns from hot coolant. Inspect hose connections and clamps for wear and replace if necessary. Verify the correct orientation of the dual inside diameter ends to match the vehicle’s HVAC system fittings. Use appropriate tools to avoid damaging the hose or fittings during installation. After installation, check for leaks and proper coolant flow during engine warm-up.

Quality Assurance and Warranty

Dayco Small I.D. Heater Hose 87954 is manufactured to meet strict SAE specifications, ensuring consistent quality and performance. The EPDM material and protective sleeve contribute to extended service life under normal operating conditions. Warranty coverage details should be confirmed with the original equipment manufacturer or supplier.