Dayco 71376 Engine Coolant Bypass Hose

Dayco 71376 Engine Coolant Bypass Hose

Dayco 71376 is a curved radiator hose built for engine coolant bypass service in select GM applications. Made from EPDM and finished in black, it uses a single I.D. hose design with 1/2-inch inside diameter ends for a direct replacement-style fit.

This Curved Radiator Hose line from Dayco focuses on dependable coolant routing in tight engine compartments. For buyers searching for a Dayco 71376 hose for Pontiac Bonneville or Buick LeSabre cooling system repair, this part matches the listed OE-style application range.

Key Features

• EPDM construction for coolant-system use
• Black finish for a clean OE-style appearance
• Single I.D. hose design
• 1/2-inch inside diameter at both ends
• Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
• Curved hose profile for routed coolant connections

Application Details

Compatible With 1988-1991 Pontiac Bonneville, N/A; 1988-1990 Buick LeSabre, N/A; 1988-1990 Buick Reatta, N/A; 1988-1990 Buick Riviera, N/A; 1988-1990 Oldsmobile 98, N/A; 1988-1990 Oldsmobile Delta 88, N/A; and 1988-1990 Oldsmobile Toronado, N/A. This part cross-references Gates 18423 for the same application.

Use Dayco 71376 when replacing a curved engine coolant bypass hose on supported Pontiac, Buick, and Oldsmobile vehicles. The part number 71376 is also commonly searched alongside Buick Riviera and Oldsmobile Delta 88 cooling hose replacement terms.

What It Helps Address

• Cracked or hardened coolant bypass hose material
• Coolant seepage at aged hose connections
• Restricted coolant routing from a deteriorated curved hose
• Service replacement for a worn OE-style bypass hose
• Cooling system maintenance on supported GM vehicles

Installation Notes

Verify hose routing, end diameters, and application match before installation. Inspect adjoining coolant pipes, clamps, and connection points for wear or corrosion so the replacement hose seals correctly. Confirm the curved shape follows the original routing path in the engine bay.

Quality Assurance

Dayco manufactures this hose to SAE J20R4 Class D-1 and SAE J1684 Type EC requirements, supporting consistent material and dimensional standards for coolant-system service.