HomeBelts and Cooling > Hoses and PipesDayco 70812 Radiator Coolant Hose
Part #: 70812

Dayco 70812 Radiator Coolant Hose

Curved Radiator Hose, Upper - Pipe To Radiator, Lower - Oil Cooler To Pipe, Lower - Pipe To Radiator, and Lower
56 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$34.04Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Curved Radiator Hose, Upper - Pipe To Radiator, Lower - Oil Cooler To Pipe, Lower - Pipe To Radiator, and Lower
Fitment: Ford, Bronco, F-100, F-150, 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

Durable Radiator Coolant Hose for Ford Trucks

The Dayco Curved Radiator Hose 70812 is engineered to provide reliable coolant flow for Ford Bronco, F-100, F-150, F-250, and F-350 models. Designed with precision, this radiator coolant hose ensures proper fitment and performance in demanding engine cooling systems.

  • Constructed from EPDM material for heat and chemical resistance
  • Dual inside diameter hose with 1 3/4 inch and 1 15/16 inch ends
  • Black color for standard OEM appearance
  • Meets SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
  • Trunk height of 15 3/4 inches for accurate fitment

About the Dayco Curved Radiator Hose Product Line

The Curved Radiator Hose line by Dayco focuses on delivering hoses with precise bends and dual inside diameters to accommodate specific radiator and engine connections. This product line is designed to meet stringent SAE standards, ensuring compatibility and durability for cooling systems in various Ford truck models. The 70812 part exemplifies this line’s commitment to quality and fitment accuracy.

Technical Details and Features

This radiator coolant 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 (1 3/4 inch on one end and 1 15/16 inch on the other) allows for a secure connection between different sized fittings. The hose does not include a heat shield or protective sleeve, which is typical for this type of radiator hose. Its black color matches OEM specifications, maintaining the original engine bay appearance.

Applications and Problem Solving

  • Replacement for worn or cracked radiator coolant hoses on Ford Bronco and F-Series trucks
  • Prevents coolant leaks that can cause engine overheating
  • Restores proper coolant flow to maintain engine temperature regulation
  • Addresses hose swelling or softening due to age or chemical exposure
  • Ensures secure connections between radiator and engine components with dual inside diameters

Installation Notes and Tips

Ensure the engine is cool before removing the old hose to avoid burns. Verify the hose ends match the radiator and engine fittings by checking the inside diameters of 1 3/4 inch and 1 15/16 inch. Use appropriate clamps to secure the hose and prevent leaks. Inspect surrounding components for wear or damage during installation. No heat shield or protective sleeve is included, so take care to route the hose away from excessive heat sources.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70812 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with industry requirements for radiator hoses. This part is designed for durability and reliable performance in Ford Bronco and F-Series trucks. Warranty information should be confirmed with the original equipment manufacturer or distributor.

BrandDayco
Part Number70812
PositionCurved Radiator Hose, Upper - Pipe To Radiator, Lower - Oil Cooler To Pipe, Lower - Pipe To Radiator, and Lower
MaterialEpdm
ColorBlack
End 1 Inside Diameter1 3/4
End 2 Inside Diameter1 15/16
Contains Heat ShieldN
Contains Protective SleeveN
Hose TypeDual i.d. hose
SAE SpecificationSae j20r4 class d-1, sae j1684 type ec
Trunk Height15 3/4

This part fits 56 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1979FordBronco5.8LV8LowerCurved Radiator Hose
1979FordBronco6.6LV8LowerCurved Radiator Hose
1979FordF-1005.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1979FordF-1005.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1979FordF-1005.8LV8LowerRadiator Coolant Hose fitment note: 2 3/4 In. Thick Rad. Top.; Curved Radiator Hose
1979FordF-1006.6LV8LowerRadiator Coolant Hose fitment note: 2 3/4 In. Thick Rad. Top.; Curved Radiator Hose
1979FordF-1505.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1979FordF-1505.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1979FordF-1505.8LV8LowerRadiator Coolant Hose fitment note: 2 3/4 In. Thick Rad. Top.; Curved Radiator Hose
1979FordF-1506.6LV8LowerRadiator Coolant Hose fitment note: 2 3/4 In. Thick Rad. Top.; Curved Radiator Hose
1979FordF-2505.8LV8LowerRadiator Coolant Hose fitment note: 2 3/4 In. Thick Rad. Top.; Curved Radiator Hose
1979FordF-2506.6LV8LowerRadiator Coolant Hose fitment note: 2 3/4 In. Thick Rad. Top.; Curved Radiator Hose
1979FordF-3505.8LV8LowerRadiator Coolant Hose fitment note: 2 3/4 In. Thick Rad. Top.; Curved Radiator Hose
1979FordF-3506.6LV8LowerRadiator Coolant Hose fitment note: 2 3/4 In. Thick Rad. Top.; Curved Radiator Hose
1979FordF-3506.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1978FordBronco5.8LV8LowerCurved Radiator Hose
1978FordBronco6.6LV8LowerCurved Radiator Hose
1978FordF-1005.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1978FordF-1005.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1978FordF-1005.8LV8LowerCurved Radiator Hose
1978FordF-1006.6LV8LowerCurved Radiator Hose
1978FordF-1505.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1978FordF-1505.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1978FordF-1505.8LV8LowerCurved Radiator Hose
1978FordF-1506.6LV8LowerCurved Radiator Hose
1978FordF-2505.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1978FordF-2505.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1978FordF-2505.8LV8LowerCurved Radiator Hose
1978FordF-2506.6LV8LowerCurved Radiator Hose
1978FordF-3505.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1978FordF-3505.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1978FordF-3505.8LV8LowerCurved Radiator Hose
1978FordF-3506.6LV8LowerCurved Radiator Hose
1978FordF-3506.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1977FordF-1005.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1977FordF-1005.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1977FordF-1005.8LV8Lower2 3/8 In. Thick Rad.; Curved Radiator Hose
1977FordF-1006.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1977FordF-1505.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1977FordF-1505.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1977FordF-1505.8LV8Lower2 3/8 In. Thick Rad.; Curved Radiator Hose
1977FordF-1506.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1977FordF-2505.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1977FordF-2505.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1977FordF-2505.8LV8Lower2 3/8 In. Thick Rad.; Curved Radiator Hose
1977FordF-2506.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1977FordF-3505.0LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1977FordF-3505.0LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1977FordF-3505.8LV8Lower2 3/8 In. Thick Rad.; Curved Radiator Hose
1977FordF-3506.6LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1976FordF-1005.0LV8Lowerw/A.C. or H.D. Cool; Curved Radiator Hose
1976FordF-1505.0LV8Lowerw/A.C. or H.D. Cool; Curved Radiator Hose
1976FordF-3505.0LV8Lowerw/A.C. or H.D. Cool; Curved Radiator Hose
1975FordF-1005.0LV8Lowerw/A.C., w/P.S., H.D. Cool; Curved Radiator Hose
1975FordF-1505.0LV8Lowerw/A.C., w/P.S., H.D. Cool; Curved Radiator Hose
1975FordF-3505.0LV8Lowerw/A.C., w/P.S., H.D. Cool; 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:

22116M

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