HomeHVAC > Hoses and PipesGates 18423 HVAC Heater Hose - Auxiliary Heater Pipe-1 To Auxiliary Heater or Auxiliary Heater To Auxiliary Heater Pipe-2
Part #: 18423

Gates 18423 HVAC Heater Hose - Auxiliary Heater Pipe-1 To Auxiliary Heater or Auxiliary Heater To Auxiliary Heater Pipe-2

Molded Heater Hose, Auxiliary Heater Pipe-1 To Auxiliary Heater and Auxiliary Heater To Auxiliary Heater Pipe-2
⚙️ 53 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Molded Heater Hose, Auxiliary Heater Pipe-1 To Auxiliary Heater and Auxiliary Heater To Auxiliary Heater Pipe-2
🚗Fitment: Buick, Oldsmobile, Pontiac, and Toyota, 4Runner, 98, Bonneville, Delta 88, LeSabre, Pickup, Reatta, Riviera, and Toronado
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Overview of Gates Molded Heater Hose 18423

The Gates Molded Heater Hose 18423 is designed for reliable HVAC system performance in select Buick, Oldsmobile, Pontiac, and Toyota vehicles. Engineered with durable EPDM material, this molded heater hose ensures consistent heat transfer and long-lasting service in automotive heating applications.

  • Constructed from high-quality EPDM for heat and chemical resistance
  • Molded design for precise fit and easy installation
  • Centerline length of 246 mm (9.7 inches) for accurate replacement
  • Inside diameter of 0.5 inches (13 mm) on both ends
  • Compatible with multiple Buick, Oldsmobile, Pontiac, and Toyota models

Detailed Product Description

The Gates Molded Heater Hose 18423 is part of the Molded Heater Hose product line, which focuses on delivering pre-formed hoses that match original equipment specifications. This hose is molded to exact dimensions, including a centerline length of 246 mm (9.7 inches) and consistent inside diameters of 0.5 inches (13 mm) on both ends, ensuring a secure and leak-free connection. Made from EPDM, the hose resists heat, ozone, and coolant chemicals, making it suitable for HVAC heater core connections in vehicles.

Compatible Vehicles and Applications

This HVAC heater hose is compatible with various models, including Buick LeSabre, Oldsmobile Delta 88, Pontiac Bonneville, Riviera, Toronado, Reatta, and Toyota 4Runner and Pickup trucks. The part number 18423 is specifically designed to replace worn or damaged heater hoses in these vehicles, maintaining proper coolant flow and heating system efficiency.

  • Replaces cracked or leaking heater hoses
  • Prevents coolant leaks in HVAC systems
  • Restores proper heater core function
  • Eliminates overheating issues related to faulty hoses
  • Ensures consistent cabin heating performance

Installation Notes and Tips

When installing the Gates Molded Heater Hose 18423, ensure the hose is routed according to the vehicle’s original configuration to avoid kinks or interference with other components. Verify the inside diameter and length match the original hose to maintain proper coolant flow. Use appropriate clamps to secure the hose ends firmly and check for leaks after installation.

Quality Assurance and Warranty

Gates Molded Heater Hose 18423 is manufactured to meet or exceed OEM standards for durability and performance. The EPDM material provides resistance to heat and coolant chemicals, contributing to a longer service life. While specific warranty details are not provided, Gates products typically come with a limited warranty against defects in material and workmanship.

BrandGates
Part Number18423
PositionMolded Heater Hose, Auxiliary Heater Pipe-1 To Auxiliary Heater and Auxiliary Heater To Auxiliary Heater Pipe-2
MaterialEpdm
End 1 Inside Diameter.5
End 1 Inside Diameter13
End 2 Inside Diameter.5
End 2 Inside Diameter13
Centerline Length246
Centerline Length9.7
Branch Quantity0
9839Yes
98450
Centerline Length (in)9.7
Centerline Length (mm)246
MoldedYes
Number of Quick Connect Fittings0

This part fits 53 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1990BuickLeSabre3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1990BuickReatta3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1990BuickRiviera3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1990Oldsmobile983.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1990OldsmobileDelta 883.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1990OldsmobileToronado3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1990PontiacBonneville3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1989BuickLeSabre3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1989BuickReatta3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1989BuickRiviera3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1989Oldsmobile983.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1989OldsmobileDelta 883.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1989OldsmobileToronado3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1989PontiacBonneville3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1989Toyota4Runner2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1989Toyota4Runner2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1989Toyota4Runner3.0LV6GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1989Toyota4Runner3.0LV6GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1989ToyotaPickup2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1989ToyotaPickup2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1989ToyotaPickup3.0LV6GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1989ToyotaPickup3.0LV6GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1988BuickLeSabre3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1988BuickReatta3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1988BuickRiviera3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1988Oldsmobile983.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1988OldsmobileDelta 883.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1988OldsmobileToronado3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1988PontiacBonneville3.8LV6GASN/ARadiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1988Toyota4Runner2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1988Toyota4Runner2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1988Toyota4Runner3.0LV6GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1988Toyota4Runner3.0LV6GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1988ToyotaPickup2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1988ToyotaPickup2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1988ToyotaPickup3.0LV6GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1988ToyotaPickup3.0LV6GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1987Toyota4Runner2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1987Toyota4Runner2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1987ToyotaPickup2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1987ToyotaPickup2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1986Toyota4Runner2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1986Toyota4Runner2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1986ToyotaPickup2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1986ToyotaPickup2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1985Toyota4Runner2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1985Toyota4Runner2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1985ToyotaPickup2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1985ToyotaPickup2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1984Toyota4Runner2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1984Toyota4Runner2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater Hose
1984ToyotaPickup2.4LL4GASAuxiliary Heater Pipe-1 To Auxiliary HeaterMolded Heater Hose
1984ToyotaPickup2.4LL4GASAuxiliary Heater To Auxiliary Heater Pipe-2Molded Heater 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:

1042314066S18423255312252553133530324303363033642221643137137683928724589164872458916587311A71376B87311BP-1702

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