Dayco 86129 HVAC Heater Hose - Engine To Valve or Valve To Engine

Dayco Small I.D. Heater Hose 86129

Dayco 86129 is a small I.D. HVAC heater hose built from EPDM and finished in black for heater circuit routing that requires a 23/32 in. inside diameter at both ends. This single I.D. hose is specified for select Buick, Oldsmobile, and Pontiac applications, including 1995 Buick Park Avenue and 1995 Pontiac Bonneville heater hose routing.

Key Features

• EPDM construction for heater hose service
• Black finish for a clean OE-style appearance
• 23/32 in. inside diameter at both ends
• Single I.D. hose design for uniform routing
• Built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Dayco 86129 small I.D. heater hose for HVAC hose replacement

Product Details

Dayco’s Small I.D. Heater Hose line focuses on heater and HVAC hose applications that require precise sizing and dependable coolant transfer. Part number 86129 uses EPDM rubber, a common material for heater hose service, and is sized with matching 23/32 in. inside diameters on both ends. That makes it a direct match for select engine-to-valve and valve-to-engine heater hose routes on 1995-1996 Oldsmobile 88, 1996 Oldsmobile LSS, 1995 Buick Park Avenue, 1995 Oldsmobile 98, and 1995 Pontiac Bonneville. This part cross-references Duralast B86129 and General Motors 25627055 for the same application.

What It Helps Address

• Cracked or aged heater hose material
• Coolant seepage at small-diameter hose connections
• Restricted heater hose routing caused by worn hose sections
• Incorrect hose sizing during HVAC hose replacement
• Service needs on Buick Park Avenue, Oldsmobile 88, Oldsmobile LSS, Oldsmobile 98, and Pontiac Bonneville heater circuits

Installation Notes

Verify the hose path, end diameters, and routing before installation. Dayco 86129 is a single I.D. hose with 23/32 in. inside diameter at both ends, so confirm the vehicle’s engine-to-valve or valve-to-engine layout matches the original hose. Inspect adjoining fittings, clamps, and coolant passages for wear or corrosion before placing the new hose in service.

Quality Assurance

This heater hose is manufactured to SAE J20R3 Class D-1 and SAE J1684 Type EC requirements, supporting specification-based replacement for the listed applications. Dayco 86129 is intended for select 1995-1996 Oldsmobile 88, 1996 Oldsmobile LSS, 1995 Buick Park Avenue, 1995 Oldsmobile 98, and 1995 Pontiac Bonneville HVAC heater hose service.