HomeBelts and Cooling > Hoses and PipesDayco 70397 Radiator Coolant Hose
Part #: 70397

Dayco 70397 Radiator Coolant Hose

Curved Radiator Hose, Lower
7 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: International, Ford, and Lincoln, M1100, M800, M800 Navy, M800 Post Office, M1200, M700, F-250, F-350, F-100, AB120, M1400, M Series Van, Capri, and Cosmopolitan
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 70397

The Dayco Curved Radiator Hose 70397 is designed specifically for Ford F-100, F-250, and F-350 models. Engineered to meet SAE specifications, this radiator coolant hose ensures reliable performance in your vehicle's cooling system.

  • Constructed from durable EPDM material for heat and chemical resistance
  • Black color with a curved design for precise fitment
  • Inside diameter of 2 inches on both ends for consistent coolant flow
  • Meets SAE J20R4 Class D-1 and SAE J1684 Type EC standards
  • Trunk height of 13 3/4 inches for proper routing in engine bay

Details on the Curved Radiator Hose Product Line

The Curved Radiator Hose line by Dayco focuses on providing hoses with specific bends and dimensions to match OEM requirements. This ensures a secure fit and optimal coolant flow without the need for modifications. The 70397 part is a single inside diameter hose designed to replace factory hoses on compatible Ford trucks, maintaining system integrity and performance.

Product Description and Specifications

This radiator coolant hose is made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, making it suitable for demanding engine environments. The hose features a consistent 2-inch inside diameter on both ends, facilitating smooth coolant circulation. Its black color and curved shape allow it to fit precisely within the engine compartment of Ford F-100, F-250, and F-350 trucks. The hose does not include a heat shield or protective sleeve, which is typical for this type of radiator hose. Compliance with SAE J20R4 Class D-1 and SAE J1684 Type EC standards confirms its suitability for automotive cooling systems.

Common Applications and Problem Solving

  • Replacement of worn or cracked radiator hoses in Ford F-100, F-250, and F-350 trucks
  • Resolving coolant leaks caused by hose deterioration
  • Preventing overheating issues due to compromised coolant flow
  • Maintaining proper coolant system pressure and circulation
  • Ensuring compatibility with OEM cooling system components

Installation Notes and Tips

Before installation, ensure the engine is cool to avoid burns or injury. Inspect hose clamps and replace if necessary to secure the hose properly. The curved design of the Dayco 70397 hose allows for direct replacement without modification. Verify that the 2-inch inside diameter matches your vehicle’s specifications. Properly route the hose to avoid contact with moving parts or sharp edges that could cause premature wear.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70397 to meet strict SAE standards, ensuring durability and performance. While specific warranty details are not provided here, Dayco products typically come with manufacturer-backed quality assurance. Using this hose helps maintain the integrity of your Ford truck’s cooling system under normal operating conditions.

BrandDayco
Part Number70397
PositionCurved Radiator Hose, Lower
ColorBlack
End 1 Inside Diameter2
End 2 Inside Diameter2
Hose TypeSingle I.D. Hose
MaterialEPDM
SAE SpecificationSAE J20R4 Class D-1, SAE J1684 Type EC
Trunk Height13 3/4

This part fits 7 vehicles. Search below:

YearMakeModelDrive TypeTransmissionLitersCylindersFuel TypePositionNotes
1966FordF-2505.8LV8Lowerw/4WD; Curved Radiator Hose
1966FordF-350Manual5.8LV8LowerSingle Rear Wheel; Curved Radiator Hose
1965FordF-1005.8LV8Lowerw/FWD; Curved Radiator Hose
1965FordF-100RWDAutomatic5.8LV8GASLowerCurved Radiator Hose
1965FordF-2505.8LV8Lowerw/FWD; Curved Radiator Hose
1965FordF-250RWDAutomatic5.8LV8GASLowerCurved Radiator Hose
1965FordF-3505.8LV8LowerSingle Rear Wheel; Curved 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:

22044M

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