Dayco 71365 Radiator Coolant Hose - Upper
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Dayco
 Curved Radiator Hose

Dayco 71365 Radiator Coolant Hose - Upper

Brand Dayco 71365
Position Upper
Material Epdm
Color Black
End 1 Inside Diameter 1 5/16
End 2 Inside Diameter 1 5/16
Contains Heat Shield N
Contains Protective Sleeve N
Hose Type Single i.d. hose
SAE Specification Sae j20r4 class d-1, sae j1684 type ec
Trunk Height 9 1/4
Product line Curved Radiator Hose
Fits Buick, Oldsmobile, and Pontiac · 10 vehicles

Curved radiator hose. EPDM construction for dependable coolant transfer.

Single I.D. hose. Consistent inside diameter at both ends for a secure fit.

SAE J20R4 Class D-1. Built to meet recognized coolant hose specifications.

Cross-references ACDelco 20221S, Atlas MC207 and CARQUEST 21703 for the same application. See all 10.

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Curved Upper Radiator Hose for GM Applications

Dayco 71365 is a curved radiator coolant hose made from EPDM for upper cooling-system routing. It measures 1 5/16 in. inside diameter at both ends and follows a single I.D. hose design for a direct replacement on listed applications.

Compatible with 1987-1994 Pontiac Sunbird upper radiator hose applications, 1988 Buick Skyhawk upper radiator hose applications, and 1988 Oldsmobile Firenza upper radiator hose applications, this hose supports vehicles equipped with air conditioning.

Key Features

  • EPDM construction for coolant-system service
  • Black finish
  • 1 5/16 in. inside diameter at both ends
  • Curved radiator hose profile for upper hose routing
  • Single I.D. hose design
  • Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
  • Dayco 71365 replacement hose for listed GM compact cars

Product Details

Dayco Curved Radiator Hose 71365 is built for upper radiator coolant routing where a formed hose is required. The EPDM rubber construction is suited for coolant exposure, while the curved shape helps match the factory hose path on the Pontiac Sunbird, Buick Skyhawk, and Oldsmobile Firenza applications listed here. This part cross-references Gates 21703 for the same application.

Use Dayco 71365 when replacing a worn, cracked, or softened upper radiator hose on 1987-1994 Pontiac Sunbird, 1988 Buick Skyhawk, or 1988 Oldsmobile Firenza models with air conditioning. The hose dimensions and formed profile support proper routing in the engine bay and help maintain the original cooling-system layout.

Common Problems This Hose Can Address

  • Coolant leaks from a split or cracked upper radiator hose
  • Softening or swelling from age and heat exposure
  • Collapsed hose sections that restrict coolant flow
  • Improper hose routing after a failed replacement
  • Fitment issues on upper radiator hose applications requiring a curved profile

Installation Notes and Tips

Confirm the hose diameter, routing shape, and upper position before installation. Inspect hose clamps, radiator necks, and thermostat housing connections for corrosion or damage, and replace any worn sealing surfaces before fitting the new hose. Verify clearance around nearby components so the curved hose follows the intended path without kinking.

Quality Assurance

Dayco 71365 is manufactured to SAE J20R4 Class D-1 and SAE J1684 Type EC standards for radiator hose service. It is a direct-fit cooling hose for the listed Pontiac Sunbird, Buick Skyhawk, and Oldsmobile Firenza applications.

Related reading

This part fits 10 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1994PontiacSunbird2.0LL4UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1993PontiacSunbird2.0LL4UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1992PontiacSunbird2.0LL4UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1991PontiacSunbird2.0LL4UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1990PontiacSunbird——UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1989PontiacSunbird——UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1988BuickSkyhawk——UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1988OldsmobileFirenza2.0LL4UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1988PontiacSunbird——UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1987PontiacSunbird——UpperCompatible with vehicles containing air conditioning.; Curved Radiator Hose
Directly replaces or cross-references 10 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 20221SAtlas — MC207CARQUEST — 21703Duralast — B71365Gates — 21703General Motors — 22538756General Motors — 22551234Goodyear — 61495NAPA — 8393Pirelli — 41495