HomeBelts and Cooling > Hoses and PipesDayco 70688 Radiator Coolant Hose
Part #: 70688

Dayco 70688 Radiator Coolant Hose

Curved Radiator Hose, Lower
6 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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OE Direct Replacement — Bolt-on fit, no modifications needed
Curved Radiator Hose, Lower
Fitment: Ford, F-100, F-250, and F-350
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 70688

The Dayco Curved Radiator Hose 70688 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
  • Single inside diameter hose type without heat shield or protective sleeve
  • Trunk height of 15 inches for proper routing in engine bay

Details on the Curved Radiator Hose Product Line

The Dayco Curved Radiator Hose line focuses on providing hoses with specific bends and dimensions to match OEM configurations. This ensures a secure fit and optimal coolant flow in Ford trucks such as the F-100, F-250, and F-350. The 70688 part number represents a single inside diameter hose made from EPDM, designed to withstand typical engine bay conditions without additional heat shielding or protective sleeves.

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. Both ends of the hose have a 2-inch inside diameter, making it suitable for consistent coolant transfer. The hose does not include a heat shield or protective sleeve, which is typical for applications where additional protection is not required. It complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring it meets industry requirements for coolant hoses. The trunk height of 15 inches allows for proper installation and routing within the engine compartment of compatible Ford trucks.

Compatible Vehicles and Common Applications

  • Replacement radiator hose for Ford F-100 models
  • Suitable for Ford F-250 cooling system repairs
  • Compatible with Ford F-350 radiator coolant systems
  • Addresses issues such as coolant leaks, hose cracks, and overheating
  • Used when original hoses show signs of wear or damage

Installation Notes and Tips

Ensure the engine is cool before removing the old radiator hose. Verify the hose ends match the 2-inch inside diameter fittings on your vehicle. Properly secure hose clamps to prevent leaks. Inspect surrounding components for wear during installation. The absence of a heat shield means extra caution should be taken to avoid contact with hot engine parts.

Quality Assurance and Warranty

Dayco manufactures this radiator hose to meet SAE standards, providing reliable performance for Ford truck cooling systems. While specific warranty details are not provided, Dayco products typically adhere to industry quality controls to ensure durability and fitment accuracy.

BrandDayco
Part Number70688
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 Height15

This part fits 6 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1969FordF-1005.9LV8LowerFits vehicles without air conditioning.; Curved Radiator Hose
1969FordF-1006.4LV8LowerFits vehicles without air conditioning.; Curved Radiator Hose
1969FordF-2505.9LV8LowerFits vehicles without air conditioning.; Curved Radiator Hose
1969FordF-2506.4LV8LowerFits vehicles without air conditioning.; Curved Radiator Hose
1969FordF-3505.9LV8LowerFits vehicles without air conditioning.; Curved Radiator Hose
1969FordF-3506.4LV8LowerFits vehicles without air conditioning.; 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:

D68799

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