HomeBelts and Cooling > Hoses and PipesDayco 71204 Radiator Coolant Hose - Lower
Part #: 71204

Dayco 71204 Radiator Coolant Hose - Lower

Curved Radiator Hose, Lower
18 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: Cadillac, Commercial Chassis, DeVille, and Fleetwood
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Overview of Dayco Curved Radiator Hose 71204

The Dayco Curved Radiator Hose 71204 is designed specifically for Cadillac Commercial Chassis, DeVille, and Fleetwood models. Engineered with durable EPDM material, this dual inside diameter hose ensures reliable coolant flow and heat resistance for your vehicle's cooling system.

  • Constructed from high-quality EPDM material for heat and chemical resistance
  • Dual inside diameter hose with 1 1/2 inch and 1 19/32 inch ends
  • Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
  • Black color for standard OEM appearance
  • Trunk height of 12 1/2 inches for precise fitment
  • Compatible with Cadillac Commercial Chassis, DeVille, and Fleetwood models

Detailed Product Description

The Dayco Curved Radiator Hose 71204 is part of the Curved Radiator Hose product line, which focuses on delivering hoses with precise bends and dual inside diameters to accommodate specific radiator and engine connections. This hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals, making it suitable for long-term use in automotive cooling systems. The dual inside diameter design, with one end measuring 1 1/2 inches and the other 1 19/32 inches, allows for a secure and leak-free connection between different sized fittings. The hose meets SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring it adheres to industry requirements for coolant hoses.

Applications and Common Issues Addressed

  • Replacement of worn or cracked radiator coolant hoses in Cadillac Commercial Chassis, DeVille, and Fleetwood vehicles
  • Prevention of coolant leaks caused by hose degradation or improper fit
  • Restoration of proper coolant flow to avoid engine overheating
  • Elimination of hose collapse or swelling under high temperature conditions
  • Addressing compatibility issues with radiator connections requiring dual inside diameter hoses

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 71204, ensure the hose is routed without kinks or sharp bends that could restrict coolant flow. Verify that the hose ends match the radiator and engine fittings by checking the inside diameters of 1 1/2 inch and 1 19/32 inch. Use appropriate clamps to secure the hose ends firmly and prevent leaks. It is recommended to inspect adjacent components for wear or damage during installation to maintain overall cooling system integrity.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 71204 to meet strict SAE specifications, including J20R4 Class D-1 and J1684 Type EC, ensuring consistent quality and performance. The EPDM material provides durability against heat and coolant exposure. While specific warranty details are not provided, Dayco products typically adhere to industry standards for reliability and are backed by the brand's quality control processes.

BrandDayco
Part Number71204
PositionCurved Radiator Hose, Lower
ColorBlack
End 1 Inside Diameter1 1/2
End 2 Inside Diameter1 19/32
Hose TypeDual I.D. Hose
MaterialEPDM
SAE SpecificationSAE J20R4 Class D-1, SAE J1684 Type EC
Trunk Height12 1/2

This part fits 18 vehicles. Search below:

YearMakeModelDrive TypeLitersCylindersPositionNotes
1990CadillacCommercial ChassisLowerCurved Radiator Hose
1990CadillacDeVilleLowerCurved Radiator Hose
1990CadillacFleetwoodLowerCurved Radiator Hose
1989CadillacCommercial ChassisLowerCurved Radiator Hose
1989CadillacDeVilleLowerCurved Radiator Hose
1989CadillacFleetwoodLowerCurved Radiator Hose
1988CadillacCommercial ChassisLowerCurved Radiator Hose
1988CadillacDeVilleLowerCurved Radiator Hose
1988CadillacFleetwoodLowerCurved Radiator Hose
1987CadillacCommercial ChassisLowerCurved Radiator Hose
1987CadillacDeVilleLowerCurved Radiator Hose
1987CadillacFleetwoodLowerCurved Radiator Hose
1986CadillacCommercial ChassisLowerCurved Radiator Hose
1986CadillacDeVilleLowerCurved Radiator Hose
1986CadillacFleetwood4.1LV8LowerCurved Radiator Hose
1985CadillacCommercial Chassis4.1LV8LowerCurved Radiator Hose
1985CadillacDeVille4.1LV8LowerCurved Radiator Hose
1985CadillacFleetwoodFWD4.1LV8LowerCurved 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:

20161S

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