HomeBelts and Cooling > Hoses and PipesDayco 72437 Radiator Coolant Hose - Lower
Part #: 72437

Dayco 72437 Radiator Coolant Hose - Lower

Curved Radiator Hose, Lower
5 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Curved Radiator Hose, Lower
Fitment: Lexus, IS300
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Dayco Curved Radiator Hose 72437

The Dayco Curved Radiator Hose 72437 is designed specifically for Lexus IS300 models, providing reliable coolant flow and engine temperature regulation. Made from durable EPDM material, this dual inside diameter hose ensures a precise fit and long-lasting performance.

  • Constructed from EPDM for heat and chemical resistance
  • Dual inside diameters: 1 5/16 inch and 1 1/2 inch
  • Black color for standard OEM appearance
  • Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
  • Trunk height of 16 1/2 inches for proper routing
  • Compatible with Lexus IS300 radiator coolant systems

Detailed Product Description

The Dayco Curved Radiator Hose 72437 is engineered to meet the cooling system demands of the Lexus IS300. Its EPDM construction offers resistance to heat, ozone, and coolant chemicals, ensuring durability under typical engine operating conditions. The hose features a dual inside diameter design, with one end measuring 1 5/16 inches and the other 1 1/2 inches, allowing for a secure and leak-free connection between radiator components. This hose does not include a heat shield or protective sleeve, consistent with the original equipment design. The trunk height of 16 1/2 inches supports proper installation and routing within the engine bay.

About the Curved Radiator Hose Product Line

Dayco's Curved Radiator Hose line focuses on delivering hoses with precise bends and dual inside diameters to match specific vehicle cooling system requirements. This product line is designed to provide a direct replacement for OEM radiator hoses, ensuring compatibility and maintaining the integrity of the cooling system. The 72437 hose exemplifies this approach by offering a tailored fit for the Lexus IS300, adhering to SAE specifications for quality and performance.

Common Applications and Problem Resolution

  • Replacement of worn or cracked radiator coolant hoses in Lexus IS300
  • Prevention of coolant leaks caused by hose degradation
  • Restoration of proper coolant flow to avoid engine overheating
  • Addressing hose swelling or softening due to heat exposure
  • Ensuring secure connections with dual inside diameter ends to prevent disconnections

Installation Notes and Tips

  • Verify hose dimensions and fitment with Lexus IS300 radiator connections before installation
  • Ensure clamps are properly tightened to avoid leaks without damaging the hose
  • Inspect surrounding components for wear or damage during replacement
  • Replace coolant as recommended after hose installation to maintain system integrity

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 72437 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for radiator coolant hoses. While specific warranty details are not provided, Dayco products typically undergo rigorous quality control to support reliable performance in automotive cooling systems.

BrandDayco
Part Number72437
PositionCurved Radiator Hose, Lower
ColorBlack
End 1 Inside Diameter1 5/16
End 2 Inside Diameter1 1/2
Hose TypeDual I.D. Hose
MaterialEPDM
SAE SpecificationSAE J20R4 Class D-1, SAE J1684 Type EC
Trunk Height16 1/2

This part fits 5 vehicles. Search below:

YearMakeModelPositionNotes
2005LexusIS300LowerCurved Radiator Hose
2004LexusIS300LowerCurved Radiator Hose
2003LexusIS300LowerCurved Radiator Hose
2002LexusIS300LowerCurved Radiator Hose
2001LexusIS300LowerCurved Radiator Hose

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

22438M

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.