Home› Belts and Cooling > Hoses and Pipes› Dayco 70306 Radiator Coolant Hose - Lower or Upper
Dayco 70306 Radiator Coolant Hose - Lower or UpperOE Quality 60-Day Returns
Part #: 70306

Dayco 70306 Radiator Coolant Hose - Lower or Upper

Curved Radiator Hose, Lower
33 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$27.11Free 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, Lower
Fitment: Subaru, Cadillac, Chevrolet, GMC, Dodge, Plymouth, and Edsel, Legacy, Outback, Impreza, Baja, Eldorado, P10 Series, P20 Series, P30 Series, C15/C1500 Pickup, C15/C1500 Suburban, C25/C2500 Pickup, C25/C2500 Suburban, C35/C3500 Pickup, K15/K1500 Pickup, K15/K1500 Suburban, K25/K2500 Pickup, K25/K2500 Suburban, P15/P1500 Van, P25/P2500 Van, P35/P3500 Van, Dart, Barracuda, Valiant, Coronet, Belvedere, Belvedere II, Fury, Fury II, Fury III, 330, 440, Polara, Savoy, 880, Fleet Special, Seneca, Suburban, Matador, Custom, Royal, Sierra, Corsair, and Plaza
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? See all Radiator Coolant Hose options

Overview of Dayco Curved Radiator Hose 70306

The Dayco Curved Radiator Hose 70306 is designed to provide reliable coolant flow for select Cadillac, Dodge, and Subaru vehicles. Engineered with durable EPDM material, this radiator coolant hose ensures consistent performance in demanding engine environments.

  • Constructed from high-quality 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
  • Trunk height of 13 inches for precise fitment
  • Compatible with Cadillac Eldorado, Dodge Dart, Subaru Baja, Impreza, Legacy, and Outback models

Detailed Product Description

The Dayco Curved Radiator Hose 70306 is a single inside diameter hose designed to maintain optimal coolant circulation within the radiator system. Made from EPDM (ethylene propylene diene monomer), this hose offers excellent resistance to heat, ozone, and automotive fluids, which helps extend service life. Both ends of the hose have an inside diameter of 1 1/2 inches, ensuring a secure connection to the radiator and engine fittings. The hose does not include a heat shield or protective sleeve, focusing on straightforward, reliable performance. With a trunk height of 13 inches, it fits specific vehicle applications precisely.

About the Curved Radiator Hose Product Line

The Dayco Curved Radiator Hose line is tailored to provide durable and precise-fit hoses for various automotive cooling systems. This product line emphasizes quality materials and adherence to SAE specifications, such as J20R4 Class D-1 and J1684 Type EC, to meet industry standards. The 70306 part is part of this line, offering a curved design that suits the routing requirements of certain Cadillac, Dodge, and Subaru models.

Common Applications and Issues Addressed

  • Replacement for cracked or leaking radiator coolant hoses
  • Restores proper coolant flow in Cadillac Eldorado and Dodge Dart cooling systems
  • Prevents overheating issues in Subaru Baja, Impreza, Legacy, and Outback models
  • Addresses hose swelling or softening due to age or heat exposure
  • Ensures secure connections with 1 1/2 inch diameter fittings

Installation Notes and Tips

  • Verify hose dimensions and fitment with your vehicle’s specifications before installation
  • Ensure all clamps and connections are tightened to manufacturer torque settings
  • Inspect surrounding components for wear or damage during replacement
  • Flush cooling system if hose failure was due to contamination or overheating
  • Use proper tools to avoid damaging hose ends during installation

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70306 to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, ensuring compliance with automotive industry requirements. The EPDM material provides durability against heat and chemical exposure typical in engine compartments. While specific warranty details are not provided, Dayco products generally adhere to strict quality control processes to maintain reliability and performance.

BrandDayco
Part Number70306
PositionCurved Radiator Hose, Lower
ColorBlack
End 1 Inside Diameter1 1/2
End 2 Inside Diameter1 1/2
Hose TypeSingle I.D. Hose
MaterialEPDM
SAE SpecificationSAE J20R4 Class D-1, SAE J1684 Type EC
Trunk Height13

This part fits 33 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2009SubaruLegacy3.0LH6LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2009SubaruOutback3.0LH6LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2008SubaruLegacy3.0LH6LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2008SubaruOutback3.0LH6LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2007SubaruImprezaLowerCurved Radiator Hose
2007SubaruImprezaLowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2007SubaruOutback3.0LH6LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2006SubaruBajaLowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2006SubaruImprezaLowerCurved Radiator Hose
2006SubaruImprezaLowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2005SubaruBajaLowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2005SubaruImpreza2.5LH4LowerCurved Radiator Hose
2005SubaruImpreza2.5LH4LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2005SubaruImpreza2.0LH4LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2004SubaruBajaLowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2004SubaruImpreza2.5LH4LowerCurved Radiator Hose
2004SubaruImpreza2.5LH4LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2004SubaruImpreza2.0LH4LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2003SubaruImpreza2.5LH4LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2003SubaruImpreza2.0LH4LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2002SubaruImpreza2.5LH4LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2002SubaruImpreza2.0LH4LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2001SubaruImpreza2.5LH4LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
2001SubaruOutback3.0LH6LowerHose Must Be Cut On Both Ends; Curved Radiator Hose
1968CadillacEldorado7.7LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1966DodgeDart4.5LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1966DodgeDart4.5LV8LowerFits vehicles without air conditioning.; Curved Radiator Hose
1965DodgeDart4.5LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1965DodgeDart4.5LV8LowerFits vehicles without air conditioning.; Curved Radiator Hose
1964DodgeDart4.5LV8LowerCompatible with vehicles containing air conditioning.; Curved Radiator Hose
1964DodgeDart4.5LV8LowerFits vehicles without air conditioning.; Curved Radiator Hose
1962DodgeDart5.2LV8LowerCurved Radiator Hose
1961DodgeDart5.2LV8LowerCurved 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:

20413S22219M

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

Related Articles