HomeBelts and Cooling > Hoses and PipesDayco 70618 Radiator Coolant Hose
Part #: 70618

Dayco 70618 Radiator Coolant Hose

Curved Radiator Hose, Upper, Lower, Lower - Pipe To Pipe, Upper - Pipe To Engine, and Upper - Pipe To Radiator
17 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, Upper, Lower, Lower - Pipe To Pipe, Upper - Pipe To Engine, and Upper - Pipe To Radiator
Fitment: BMW, Buick, and Ford, 540i, 740i, 740iL, E-100 Econoline, Econoline, LeSabre, and Riviera
Easy Returns — Return within 60 days for a full refund
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Overview of Dayco Curved Radiator Hose 70618

The Dayco Curved Radiator Hose 70618 is designed to provide reliable coolant flow for select BMW, Buick, and Ford vehicles. Engineered with durable EPDM material, this radiator coolant hose ensures consistent performance under typical operating conditions.

  • Constructed from 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
  • Curved design suitable for specific radiator connections
  • Compatible with BMW 540i, 740i, 740iL, Buick LeSabre, Riviera, and Ford Econoline models

Detailed Product Description

The Dayco Curved Radiator Hose 70618 is a single inside diameter hose made from EPDM (ethylene propylene diene monomer) rubber, known for its resistance to heat, ozone, and coolant chemicals. Both ends of the hose have an inside diameter of 1 1/2 inches, making it suitable for radiator coolant systems requiring this size. This hose does not include a heat shield or protective sleeve, focusing on straightforward coolant transfer. It complies with SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring it meets industry requirements for coolant hoses.

The Curved Radiator Hose product line by Dayco is designed to accommodate specific radiator hose routing needs where a curved hose is necessary to fit the engine bay layout. This hose line supports proper coolant flow and fitment in vehicles requiring precise hose shapes, such as the BMW 540i and 740i series, Buick LeSabre and Riviera, and Ford Econoline vans.

Common Applications and Problem Solving

  • Replacement for worn or cracked radiator coolant hoses in BMW 540i, 740i, and 740iL
  • Restores proper coolant flow in Buick LeSabre and Riviera models
  • Prevents coolant leaks in Ford E-100 Econoline and Econoline vans
  • Addresses overheating issues caused by deteriorated radiator hoses
  • Ensures secure coolant system connections with correct hose diameter

Installation Notes and Tips

When installing the Dayco Curved Radiator Hose 70618, ensure the hose ends match the 1 1/2 inch inside diameter fittings on your vehicle. Inspect the radiator and engine connections for corrosion or damage before installation. Use appropriate clamps to secure the hose and prevent leaks. Avoid twisting or stretching the hose during installation to maintain its integrity and fit.

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70618 to meet SAE specifications, providing assurance of material quality and performance. While specific warranty details are not provided, Dayco products typically adhere to industry standards for durability and reliability in automotive cooling systems.

BrandDayco
Part Number70618
PositionCurved Radiator Hose, Upper, Lower, Lower - Pipe To Pipe, Upper - Pipe To Engine, and Upper - Pipe To Radiator
MaterialEpdm
ColorBlack
End 1 Inside Diameter1 1/2
End 2 Inside Diameter1 1/2
Contains Heat ShieldN
Contains Protective SleeveN
Hose TypeSingle i.d. hose
SAE SpecificationSae j20r4 class d-1, sae j1684 type ec
Trunk Height16

This part fits 17 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2003BMW540iUpperw/o Quick Connectors; Curved Radiator Hose
2002BMW540iUpperw/o Quick Connectors; Curved Radiator Hose
2001BMW540iUpperw/o Quick Connectors; Curved Radiator Hose
2001BMW740iUpperw/o Quick Connectors; Curved Radiator Hose
2001BMW740iLUpperw/o Quick Connectors; Curved Radiator Hose
2000BMW540iUpperw/o Quick Connectors; Curved Radiator Hose
2000BMW740iUpperw/o Quick Connectors; Curved Radiator Hose
2000BMW740iLUpperw/o Quick Connectors; Curved Radiator Hose
1999BMW540iUpperw/o Quick Connectors; Curved Radiator Hose
1999BMW740iUpperw/o Quick Connectors; Curved Radiator Hose
1999BMW740iLUpperw/o Quick Connectors; Curved Radiator Hose
1974FordE-100 Econoline4.9LL6UpperStandard radiator coolant hose.; Curved Radiator Hose
1973FordE-100 Econoline4.9LL6UpperStandard radiator coolant hose.; Curved Radiator Hose
1970BuickLeSabre7.5LV8LowerCurved Radiator Hose
1970BuickRiviera7.5LV8LowerCurved Radiator Hose
1969BuickRiviera7.0LV8LowerCurved Radiator Hose
1965FordEconoline3.9LL6UpperCurved 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:

22219M

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