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Gates 21490 Radiator Coolant Hose - LowerOE Quality 60-Day Returns
Part #: 21490

Gates 21490 Radiator Coolant Hose - Lower

Molded Coolant Hose, Lower
29 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
Molded Coolant Hose, Lower
Fitment: Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac, Cavalier, Cimarron, Firenza, J2000, J2000 Sunbird, Skyhawk, and Sunbird
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Gates 21490 Molded Coolant Hose

The Gates 21490 molded coolant hose is built for lower radiator hose service on select GM compact cars from the 1980s and early 1990s. Made from EPDM rubber and formed to OEM-style dimensions, it supports a direct replacement for the original coolant routing on applications such as the Chevrolet Cavalier, Buick Skyhawk, and Cadillac Cimarron.

Key Features

  • EPDM construction for coolant-system durability
  • Molded hose shape for factory-style routing
  • End 1 inside diameter: 1.25 in. (32 mm)
  • End 2 inside diameter: 1.7 in. (43 mm)
  • Centerline length: 13.8 in. (351 mm)
  • No spring, no branch, and no quick-connect fittings
  • Lower radiator coolant hose application

Product Details

Gates Molded Coolant Hose line is engineered for upper, lower, bypass, heater, and other coolant routing needs with OEM-quality specifications. Part number 21490 follows the molded profile needed for the listed lower hose applications, helping maintain proper hose alignment and coolant flow in vehicles that require a shaped replacement rather than a universal straight hose. This part cross-references Dayco 71159 for the same application.

Vehicle Fitment

  • Fits 1989-1991 Chevrolet Cavalier, Lower; Molded Coolant Hose
  • Fits 1989 Buick Skyhawk, Lower; Molded Coolant Hose
  • Fits 1983-1988 Buick Skyhawk, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
  • Fits 1983-1988 Chevrolet Cavalier, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
  • Fits 1983-1988 Oldsmobile Firenza, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
  • Fits 1983-1986 Cadillac Cimarron, Lower; Molded Coolant Hose
  • Fits 1986 Pontiac Sunbird, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
  • Fits 1984 Pontiac J2000 Sunbird, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
  • Fits 1983 Pontiac J2000, Lower; HVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose

Common Replacement Reasons

  • Cracked or hardened lower radiator hose
  • Coolant seepage at the hose body or ends
  • Collapsed hose from age or heat cycling
  • Incorrect hose shape after prior repair
  • Loss of proper coolant circulation through the lower hose path

Installation Notes and Quality Assurance

Verify hose routing, end diameters, and centerline length against the original part before installation. Inspect adjoining necks and clamps for wear, and confirm the hose is seated without twist or kinks. Gates molded coolant hoses are produced to OEM-quality specifications for replacement use in the listed applications.

Search terms: Gates 21490, Chevrolet Cavalier lower radiator hose, Buick Skyhawk coolant hose, Cadillac Cimarron molded hose.

BrandGates
Part Number21490
PositionMolded Coolant Hose, Lower
MaterialEpdm
End 1 Inside Diameter1.25
End 1 Inside Diameter32
End 2 Inside Diameter1.7
End 2 Inside Diameter43
Contains SpringNo
Centerline Length13.8
Centerline Length351
Branch Quantity0
9839Yes
98450
Modular HoseNo
MoldedYes
Number of Quick Connect Fittings0

This part fits 29 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1991ChevroletCavalier2.2LL4GASLowerMolded Coolant Hose
1990ChevroletCavalier2.2LL4GASLowerMolded Coolant Hose
1989BuickSkyhawk2.0LL4GASLowerMolded Coolant Hose
1989ChevroletCavalier2.0LL4GASLowerMolded Coolant Hose
1988BuickSkyhawk2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1988ChevroletCavalier2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1988OldsmobileFirenza2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1987BuickSkyhawk2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1987ChevroletCavalier2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1987OldsmobileFirenza2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1986BuickSkyhawk2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1986CadillacCimarron2.0LL4GASLowerMolded Coolant Hose
1986ChevroletCavalier2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1986OldsmobileFirenza2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1986PontiacSunbird2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1985BuickSkyhawk2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1985CadillacCimarron2.0LL4GASLowerMolded Coolant Hose
1985ChevroletCavalier2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1985OldsmobileFirenza2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1984BuickSkyhawk2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1984CadillacCimarron2.0LL4GASLowerMolded Coolant Hose
1984ChevroletCavalier2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1984OldsmobileFirenza2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1984PontiacJ2000 Sunbird2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1983BuickSkyhawk2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1983CadillacCimarron2.0LL4GASLowerMolded Coolant Hose
1983ChevroletCavalier2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1983OldsmobileFirenza2.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant Hose
1983PontiacJ20002.0LL4GASLowerHVAC heater hose with A/C, fits Serpentine Belt application.; Molded Coolant 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:

14-1633-614-2519-4140599951409355620177S210521490225512332320728251319443612687115982078312B71159C1490C1593KM-1500MC121MH-4490MH-4593

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

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