HomeBelts and Cooling > Hoses and PipesDayco 70725 Radiator Coolant Hose - Lower or Upper
Part #: 70725

Dayco 70725 Radiator Coolant Hose - Lower or Upper

Curved Radiator Hose, Lower
⚙️ 27 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Curved Radiator Hose, Lower
🚗Fitment: Buick and Ford, Century, Regal, Electra, LeSabre, E-250 Econoline, E-250 Econoline Club Wagon, E-350 Econoline, Centurion, Estate Wagon, GS, Skylark, Sportwagon, Special, and GS 350
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Overview of Dayco Curved Radiator Hose 70725

The Dayco Curved Radiator Hose 70725 is designed to provide reliable coolant flow for select Buick and Ford vehicles. Engineered with durable EPDM material, this radiator coolant hose ensures consistent performance in demanding engine environments.

  • Constructed from high-quality EPDM for heat and chemical resistance
  • Black single inside diameter hose with 1 1/2 inch ends
  • Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
  • Trunk height of 18 1/2 inches for precise fitment
  • Compatible with Buick Century, LeSabre, Regal, Skylark and Ford E-250 Econoline, E-250 Econoline Club Wagon, E-350 Econoline

Detailed Product Description

The Dayco Curved Radiator Hose line is engineered to meet stringent automotive cooling system requirements. This particular hose, part number 70725, is made from EPDM (ethylene propylene diene monomer) rubber, which offers excellent resistance to heat, ozone, and coolant chemicals. The hose features a single inside diameter of 1 1/2 inches on both ends, ensuring a secure and leak-free connection within the cooling system. With a trunk height of 18 1/2 inches, it is designed to fit specific radiator hose routing paths in compatible Buick and Ford models. This hose complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its suitability for automotive coolant applications without heat shields or protective sleeves.

Compatible Vehicles and Applications

  • Buick Century, LeSabre, Regal, Skylark models requiring a 1 1/2 inch curved radiator hose
  • Ford E-250 Econoline, E-250 Econoline Club Wagon, and E-350 Econoline models with matching hose specifications
  • Replacement for worn or damaged radiator coolant hoses in listed vehicles
  • Helps maintain proper engine temperature by ensuring coolant flow
  • Prevents coolant leaks and potential engine overheating issues

Installation Notes and Tips

  • Verify hose dimensions and fitment with your vehicle’s specifications before installation
  • Ensure all clamps and connections are secure to prevent leaks
  • Inspect surrounding components for wear or damage during replacement
  • Drain coolant system safely before removing the old hose
  • Use appropriate tools to avoid damaging hose ends or radiator fittings

Quality Assurance and Warranty

Dayco’s Curved Radiator Hose 70725 is manufactured to meet SAE standards, ensuring consistent quality and durability. While specific warranty details are not provided, Dayco products typically adhere to industry quality controls and are designed for reliable service life in automotive cooling systems.

BrandDayco
Part Number70725
PositionCurved Radiator Hose, Lower
ColorBlack
End 1 Inside Diameter1 1/2
End 2 Inside Diameter1 1/2
Hose TypeSingle I.D. Hose
MaterialEPDM
SAE SpecificationSAE J20R4 Class D-1, SAE J1684 Type EC
Trunk Height18 1/2

This part fits 27 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1977BuickCentury5.7LV8LowerCurved Radiator Hose
1977BuickRegal5.7LV8LowerCurved Radiator Hose
1976BuickCentury5.7LV8LowerCurved Radiator Hose
1976BuickLeSabre5.7LV8LowerCurved Radiator Hose
1976BuickRegal5.7LV8LowerCurved Radiator Hose
1975BuickCentury5.7LV8LowerCurved Radiator Hose
1975BuickLeSabre5.7LV8LowerCurved Radiator Hose
1975BuickRegal5.7LV8LowerCurved Radiator Hose
1975FordE-250 Econoline7.5LV8UpperCurved Radiator Hose
1975FordE-250 Econoline Club Wagon7.5LV8UpperCurved Radiator Hose
1975FordE-350 Econoline7.5LV8UpperCurved Radiator Hose
1974BuickCentury5.7LV8LowerCurved Radiator Hose
1974BuickLeSabre5.7LV8LowerCurved Radiator Hose
1974BuickRegal5.7LV8LowerCurved Radiator Hose
1973BuickCentury5.7LV8LowerCurved Radiator Hose
1973BuickLeSabre5.7LV8LowerCurved Radiator Hose
1973BuickRegal5.7LV8LowerCurved Radiator Hose
1972BuickLeSabre5.7LV8LowerCurved Radiator Hose
1972BuickSkylark5.7LV8LowerCurved Radiator Hose
1971BuickLeSabre5.7LV8LowerEarly; Curved Radiator Hose
1971BuickLeSabre5.7LV8LowerLate; Curved Radiator Hose
1971BuickSkylark5.7LV8LowerCurved Radiator Hose
1970BuickLeSabre5.7LV8LowerCurved Radiator Hose
1970BuickSkylark5.7LV8LowerCurved Radiator Hose
1969BuickLeSabre5.7LV8LowerCurved Radiator Hose
1969BuickSkylark5.7LV8LowerCurved Radiator Hose
1968BuickSkylark5.7LV8LowerCurved 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:

24112L

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