Dayco 72364 Radiator Coolant Hose - Lower
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Dayco
 Curved Radiator Hose

Dayco 72364 Radiator Coolant Hose - Lower

Brand Dayco 72364
Position Lower
Color Black
End 1 Inside Diameter 1 1/2
End 1 Outside Diameter 1 27/32
End 2 Inside Diameter 1 1/2
End 2 Outside Diameter 1 27/32
Hose Type Single I.D. Hose
Material EPDM
SAE Specification SAE J20R4 Class D-1, SAE J1684 Type EC
Trunk Height 12
Product line Curved Radiator Hose
Fits Buick and Cadillac · 12 vehicles

Curved radiator hose. Formed for a smoother coolant path and easier routing.

EPDM construction. Resists heat and coolant exposure for dependable service.

Single I.D. hose. Provides a consistent 1 1/2-inch inside diameter at both ends.

Cross-references ACDelco 20461S, CARQUEST 23139 and Duralast D72364 for the same application. See all 8.

$47.89Free shipping
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Not what you need? See all Radiator Coolant Hose options

Curved Lower Radiator Hose for Buick and Cadillac

Dayco Curved Radiator Hose 72364 is a lower radiator coolant hose built from EPDM for dependable coolant transfer in the engine cooling system. It is shaped for the lower hose routing used on select Buick Lucerne and Cadillac DTS applications, with a black finish and SAE J20R4 Class D-1 / SAE J1684 Type EC construction standards.

Key Features

  • EPDM rubber construction for cooling-system service
  • Curved radiator hose design for lower hose routing
  • 1 1/2 in. inside diameter at both ends
  • Black finish for a clean OE-style appearance
  • Built to SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
  • Dayco 72364 replacement hose for select GM applications

Product Details

This Dayco curved radiator hose is engineered as a single I.D. hose with matching 1 1/2 in. inside diameters and 1 27/32 in. outside diameters at both ends. The EPDM material is commonly used in coolant hose construction for its resistance to heat and coolant exposure, making it a practical replacement for the lower radiator hose on vehicles such as the Buick Lucerne and Cadillac DTS. Dayco 72364 is also cross-referenced to Duralast D72364 for the same application.

Compatible fitment includes Fits 2006-2011 Buick Lucerne, Lower, with air conditioning noted on applicable vehicles, and Fits 2006-2011 Cadillac DTS, Lower. This curved radiator hose follows the routing needed for these applications and supports proper coolant flow between engine components and the radiator.

Common Uses

  • Replacing a cracked or aged lower radiator hose
  • Restoring coolant circulation in Buick Lucerne cooling systems
  • Restoring coolant circulation in Cadillac DTS cooling systems
  • Addressing coolant seepage at hose ends or bends
  • Correcting hose fitment issues caused by heat-related hardening

Installation Notes

Inspect hose clamps, mating tubes, and nearby cooling-system components before installation. Drain coolant as needed, verify the hose routing matches the original lower hose path, and confirm the 1 1/2 in. end diameters before securing the hose. After installation, refill the cooling system and check for leaks at operating temperature.

Quality Assurance

Dayco manufactures this hose to published SAE specifications for radiator coolant hose service, supporting consistent fit and material performance in the cooling system.

Related reading

This part fits 12 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2011BuickLucerne4.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
2011CadillacDTS——LowerCurved Radiator Hose
2010BuickLucerne4.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
2010CadillacDTS——LowerCurved Radiator Hose
2009BuickLucerne4.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
2009CadillacDTS——LowerCurved Radiator Hose
2008BuickLucerne4.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
2008CadillacDTS——LowerCurved Radiator Hose
2007BuickLucerne4.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
2007CadillacDTS——LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
2006BuickLucerne4.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
2006CadillacDTS——LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
Directly replaces or cross-references 8 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ACDelco — 20461SCARQUEST — 23139Duralast — D72364Gates — 23139General Motors — 21999765General Motors — 25769587Goodyear — 66132NAPA — 9800