Home› Belts and Cooling > Hoses and Pipes› Dayco 70623 Radiator Coolant Hose - Lower
Dayco 70623 Radiator Coolant Hose - LowerOE Quality 60-Day Returns
Part #: 70623

Dayco 70623 Radiator Coolant Hose - Lower

Curved Radiator Hose, Lower
149 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$28.87Free 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: Dodge, Plymouth, Chevrolet, and GMC, B250, B350, B150, PB150, PB250, PB350, B100, B200, B300, CB300, PB100, PB200, PB300, Blazer, C10 Pickup, C10 Suburban, C20 Pickup, C20 Suburban, C30 Pickup, K10 Pickup, K10 Suburban, K20 Pickup, K20 Suburban, K30 Pickup, P20 Van, P30 Van, C15/C1500 Pickup, C15/C1500 Suburban, C25/C2500 Pickup, C25/C2500 Suburban, C35/C3500 Pickup, Jimmy, K15/K1500 Pickup, K15/K1500 Suburban, K25/K2500 Pickup, K25/K2500 Suburban, K35/K3500 Pickup, P25/P2500 Van, P35/P3500 Van, Bel Air, Biscayne, Brookwood, Caprice, Estate, G10 Van, G20 Van, G30 Van, Impala, Kingswood, Townsman, G15/G1500 Van, G25/G2500 Van, G35/G3500 Van, P10 Van, P15/P1500 Van, C10 Panel, C20 Panel, and K20 Panel
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 70623

The Dayco Curved Radiator Hose 70623 is designed to provide reliable coolant flow for various Chevrolet, Dodge, GMC, and Plymouth vehicles. Engineered with durable EPDM material, this radiator coolant hose ensures consistent performance under typical operating conditions.

  • Constructed from high-quality EPDM material for heat and chemical resistance
  • Black color with a single inside diameter of 1 3/4 inches on both ends
  • Complies with SAE J20R4 Class D-1 and SAE J1684 Type EC specifications
  • Trunk height measures 14 1/2 inches for precise fitment
  • Compatible with multiple Chevrolet, Dodge, GMC, and Plymouth models

Detailed Product Description

The Dayco Curved Radiator Hose 70623 is a single inside diameter hose designed to maintain efficient coolant circulation in vehicle cooling systems. Made from EPDM, a synthetic rubber known for its resistance to heat, ozone, and coolant chemicals, this hose supports long-term durability. Both ends have an inside diameter of 1 3/4 inches, ensuring a secure connection to radiator and engine fittings. The hose does not include a heat shield or protective sleeve, which is typical for this type of radiator coolant hose. Its trunk height of 14 1/2 inches allows it to fit specific vehicle configurations accurately.

The Curved Radiator Hose product line from Dayco focuses on delivering hoses shaped to accommodate specific engine bay layouts, reducing stress and improving coolant flow. This hose is engineered to meet SAE J20R4 Class D-1 and SAE J1684 Type EC standards, confirming its compliance with industry requirements for coolant hoses.

Compatible Vehicles and Applications

  • Chevrolet models including Bel Air, Blazer, C10 Suburban, C20 Suburban, Caprice, Impala, K10 Suburban, and K20 Suburban
  • Dodge models B100, B150, B200, B250, B300, B350
  • GMC models Jimmy, PB150, PB250, PB350
  • Plymouth models compatible with specified hose dimensions

Common Issues Addressed by This Radiator Hose

  • Replacement of cracked or leaking radiator coolant hoses
  • Resolving coolant flow restrictions due to hose deformation
  • Preventing overheating caused by coolant leaks
  • Maintaining proper coolant system pressure and flow
  • Addressing hose deterioration from heat and chemical exposure

Installation Notes and Tips

  • Ensure the hose diameter matches the radiator and engine fittings (1 3/4 inches inside diameter)
  • Inspect clamps and fittings for wear before installation
  • Verify the hose routing matches the original to avoid kinks or stress points
  • Replace any damaged clamps or connectors during installation
  • Check for leaks after installation and during initial engine operation

Quality Assurance and Warranty

Dayco manufactures the Curved Radiator Hose 70623 to meet SAE specifications, ensuring reliable performance in cooling systems. The EPDM material provides resistance to heat and coolant chemicals, contributing to the hose's durability. While specific warranty details are not provided, Dayco products typically adhere to industry standards for quality and reliability.

BrandDayco
Part Number70623
PositionCurved Radiator Hose, Lower
ColorBlack
End 1 Inside Diameter1 3/4
End 2 Inside Diameter1 3/4
Hose TypeSingle I.D. Hose
MaterialEPDM
SAE SpecificationSAE J20R4 Class D-1, SAE J1684 Type EC
Trunk Height14 1/2

This part fits 149 vehicles. Search below:

YearMakeModelTransmissionLitersCylindersFuel TypePositionNotes
1992DodgeB2505.9LV8LowerCurved Radiator Hose
1992DodgeB3505.9LV8LowerCurved Radiator Hose
1991DodgeB1503.9LV6LowerCurved Radiator Hose
1991DodgeB1505.2LV8LowerCurved Radiator Hose
1991DodgeB2503.9LV6LowerCurved Radiator Hose
1991DodgeB2505.2LV8LowerCurved Radiator Hose
1991DodgeB2505.9LV8LowerCurved Radiator Hose
1991DodgeB3505.2LV8LowerCurved Radiator Hose
1991DodgeB3505.9LV8LowerCurved Radiator Hose
1990DodgeB1503.9LV6LowerCurved Radiator Hose
1990DodgeB1505.2LV8LowerCurved Radiator Hose
1990DodgeB2503.9LV6LowerCurved Radiator Hose
1990DodgeB2505.2LV8LowerCurved Radiator Hose
1990DodgeB2505.9LV8LowerCurved Radiator Hose
1990DodgeB3505.2LV8LowerCurved Radiator Hose
1990DodgeB3505.9LV8LowerCurved Radiator Hose
1989DodgeB1503.9LV6LowerCurved Radiator Hose
1989DodgeB1505.2LV8LowerCurved Radiator Hose
1989DodgeB2503.9LV6LowerCurved Radiator Hose
1989DodgeB2505.2LV8LowerCurved Radiator Hose
1989DodgeB2505.9LV8LowerCurved Radiator Hose
1989DodgeB3505.2LV8LowerCurved Radiator Hose
1989DodgeB3505.9LV8LowerCurved Radiator Hose
1988DodgeB1503.9LV6LowerCurved Radiator Hose
1988DodgeB1505.2LV8LowerCurved Radiator Hose
1988DodgeB2503.9LV6LowerCurved Radiator Hose
1988DodgeB2505.2LV8LowerCurved Radiator Hose
1988DodgeB2505.9LV8LowerCurved Radiator Hose
1988DodgeB3505.2LV8LowerCurved Radiator Hose
1988DodgeB3505.9LV8LowerCurved Radiator Hose
1987DodgeB1505.2LV8LowerCurved Radiator Hose
1987DodgeB2505.2LV8LowerCurved Radiator Hose
1987DodgeB2505.9LV8LowerCurved Radiator Hose
1987DodgeB3505.2LV8LowerCurved Radiator Hose
1987DodgeB3505.9LV8LowerCurved Radiator Hose
1986DodgeB1505.2LV8LowerCurved Radiator Hose
1986DodgeB2505.2LV8LowerCurved Radiator Hose
1986DodgeB2505.9LV8LowerCurved Radiator Hose
1986DodgeB3505.2LV8LowerCurved Radiator Hose
1986DodgeB3505.9LV8LowerCurved Radiator Hose
1985DodgeB1505.2LV8LowerCurved Radiator Hose
1985DodgeB2505.2LV8LowerCurved Radiator Hose
1985DodgeB2505.9LV8LowerCurved Radiator Hose
1985DodgeB3505.2LV8LowerCurved Radiator Hose
1985DodgeB3505.9LV8LowerCurved Radiator Hose
1984DodgeB1505.2LV8Lower28 In. Rad.; Curved Radiator Hose
1984DodgeB2505.2LV8Lower28 In. Rad.; Curved Radiator Hose
1984DodgeB2505.9LV8Lower28 In. Rad.; Curved Radiator Hose
1984DodgeB3505.2LV8Lower28 In. Rad.; Curved Radiator Hose
1984DodgeB3505.9LV8Lower28 In. Rad.; Curved Radiator Hose
1983DodgeB1505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1983DodgeB2505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1983DodgeB3505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1983DodgeB3505.9LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1983PlymouthPB1505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1983PlymouthPB2505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1983PlymouthPB3505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1983PlymouthPB3505.9LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1982DodgeB1505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1982DodgeB2505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1982DodgeB3505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1982DodgeB3505.9LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1982PlymouthPB2505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1982PlymouthPB3505.2LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1982PlymouthPB3505.9LV8LowerRadiator Coolant Hose for H.D. vehicles.; Curved Radiator Hose
1981DodgeB1505.2LV8Lowerw/A.C., Two Piece Hose or H.D. Cool; Curved Radiator Hose
1981DodgeB2505.2LV8Lowerw/A.C., Two Piece Hose or H.D. Cool; Curved Radiator Hose
1981DodgeB2505.9LV8Lowerw/A.C., Two Piece Hose or H.D. Cool; Curved Radiator Hose
1981DodgeB3505.2LV8Lowerw/A.C., Two Piece Hose or H.D. Cool; Curved Radiator Hose
1981DodgeB3505.9LV8Lowerw/A.C., Two Piece Hose or H.D. Cool; Curved Radiator Hose
1981PlymouthPB1505.2LV8Lowerw/A.C., H.D. Cool; Curved Radiator Hose
1981PlymouthPB2505.2LV8Lowerw/A.C., H.D. Cool; Curved Radiator Hose
1981PlymouthPB2505.9LV8Lowerw/A.C., H.D. Cool; Curved Radiator Hose
1981PlymouthPB3505.2LV8Lowerw/A.C., H.D. Cool; Curved Radiator Hose
1981PlymouthPB3505.9LV8Lowerw/A.C., H.D. Cool; Curved Radiator Hose
1980DodgeB1005.2LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1980DodgeB2005.2LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1980DodgeB2005.9LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1980DodgeB3005.2LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1980DodgeB3005.9LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1979DodgeB1005.2LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1979DodgeB2005.2LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1979DodgeB2005.9LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1979DodgeB3005.2LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1979DodgeB3005.9LV8Lowerw/A.C., Two Piece Hose, H.D. Cool; Curved Radiator Hose
1972ChevroletBlazerManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1972ChevroletBlazerManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1972ChevroletC10 SuburbanManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1972ChevroletC10 SuburbanManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1972ChevroletC20 SuburbanManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1972ChevroletC20 SuburbanManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1972ChevroletK10 SuburbanManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1972ChevroletK10 SuburbanManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1972ChevroletK20 SuburbanManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1972ChevroletK20 SuburbanManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1972GMCJimmyManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1972GMCJimmyManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletBlazerManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletBlazer4.8LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletBlazerManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletC10 SuburbanManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletC20 SuburbanManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletC20 SuburbanManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletK10 SuburbanManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletK10 SuburbanManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletK20 SuburbanManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1971ChevroletK20 SuburbanManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1971GMCJimmyManual4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1971GMCJimmyManual4.1LL6GASLowerFits vehicles without air conditioning.; Curved Radiator Hose
1970ChevroletBel Air6.6LV8LowerCurved Radiator Hose
1970ChevroletBel Air5.7LV8Lower265 HP; Curved Radiator Hose
1970ChevroletBlazer4.8LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1970ChevroletBlazer4.1LL6LowerCurved Radiator Hose
1970ChevroletC10 Suburban4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1970ChevroletC20 Suburban4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1970ChevroletCaprice6.6LV8Lower330 HP; Curved Radiator Hose
1970ChevroletCaprice5.7LV8LowerCurved Radiator Hose
1970ChevroletImpala6.6LV8Lower330 HP; Curved Radiator Hose
1970ChevroletImpala5.7LV8Lower265 HP; Curved Radiator Hose
1970ChevroletK10 Suburban4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1970ChevroletK20 Suburban4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1970GMCG15/G1500 Van4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1970GMCG25/G2500 Van4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1970GMCG35/G3500 Van4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1970GMCJimmy4.1LL6LowerCurved Radiator Hose
1969ChevroletBel Air5.4LV8LowerCurved Radiator Hose
1969ChevroletBel Air5.3LV8LowerCurved Radiator Hose
1969ChevroletBel Air5.7LV8LowerCurved Radiator Hose
1969ChevroletCaprice5.4LV8LowerCurved Radiator Hose
1969ChevroletCaprice5.3LV8LowerCurved Radiator Hose
1969ChevroletCaprice5.7LV8LowerCurved Radiator Hose
1969ChevroletImpala5.4LV8LowerCurved Radiator Hose
1969ChevroletImpala5.3LV8LowerCurved Radiator Hose
1969ChevroletImpala5.7LV8LowerCurved Radiator Hose
1968ChevroletC10 Suburban4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1968ChevroletC10 Suburban4.8LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1968ChevroletC20 Suburban4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1968ChevroletC20 Suburban4.8LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1968ChevroletK10 Suburban4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1968ChevroletK20 Suburban4.1LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1968ChevroletK20 Suburban4.8LL6LowerFits vehicles without air conditioning.; Curved Radiator Hose
1967ChevroletC10 Suburban4.1LL6LowerCurved Radiator Hose
1967ChevroletC10 Suburban4.8LL6LowerCurved Radiator Hose
1967ChevroletC20 Suburban4.1LL6LowerCurved Radiator Hose
1967ChevroletC20 Suburban4.8LL6LowerCurved Radiator Hose
1967ChevroletK10 Suburban4.1LL6LowerCurved Radiator Hose
1967ChevroletK10 Suburban4.8LL6LowerCurved Radiator Hose
1967ChevroletK20 Suburban4.1LL6LowerCurved Radiator Hose
1967ChevroletK20 Suburban4.8LL6LowerCurved 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:

408874652004959

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

Related Articles