HomeHVAC > Hoses and PipesGates 18779 HVAC Heater Hose
Part #: 18779

Gates 18779 HVAC Heater Hose

Molded Heater Hose, Tee-2 To Reservoir, Heater To Engine, Heater To Pipe-2, and Pipe-1 To Water Pump
⚙️ 32 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$22.82Free 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
📦Molded Heater Hose, Tee-2 To Reservoir, Heater To Engine, Heater To Pipe-2, and Pipe-1 To Water Pump
🚗Fitment: Ford, Mazda, and Mercury, 323, Escort, MX-3, Protege, and Tracer
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Gates Molded Heater Hose 18779

The Gates Molded Heater Hose 18779 is designed for reliable HVAC system performance in select Ford, Mazda, and Mercury 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 rubber for heat and ozone resistance
  • Molded design for precise fit and leak prevention
  • Centerline length of 14.1 inches (358 mm) for accurate installation
  • Inside diameter of 0.62 inches (16 mm) on both ends
  • Compatible with Ford Escort, Mazda 323, MX-3, Protege, and Mercury Tracer models

Detailed Product Description

This HVAC heater hose from Gates features a molded construction that matches original equipment specifications, providing a secure and leak-free connection within the vehicle's heating system. The EPDM material offers resistance to heat, coolant, and environmental factors, making it suitable for extended use in automotive HVAC applications. With a centerline length of 14.1 inches (358 mm) and consistent 0.62 inch (16 mm) inside diameters on both ends, the hose is designed to fit precisely in the heating circuit of compatible Ford, Mazda, and Mercury vehicles.

About the Molded Heater Hose Product Line

The Gates Molded Heater Hose line focuses on delivering hoses that are pre-formed to exact OEM shapes, reducing installation time and improving fitment accuracy. This product line is engineered to meet the specific routing and dimensional requirements of various vehicle models, including the Ford Escort and Mazda Protege, ensuring reliable HVAC system operation.

Applications and Common Issues Addressed

  • Replacement of cracked or leaking heater hoses in Ford Escort and Mazda 323
  • Resolving coolant leaks that affect cabin heating performance
  • Addressing hose deterioration caused by heat and chemical exposure
  • Restoring proper coolant flow in Mercury Tracer heating systems
  • Preventing HVAC system overheating due to compromised hoses

Installation Notes and Tips

Ensure the vehicle's cooling system is cool before beginning installation. Verify hose routing matches OEM specifications to avoid kinks or interference. Use appropriate clamps to secure hose ends and check for leaks after installation. The molded design simplifies alignment but confirm fitment with the specific Ford, Mazda, or Mercury model year.

Quality Assurance and Warranty

Gates Molded Heater Hose 18779 is manufactured to meet stringent quality standards for durability and performance. The EPDM construction provides resistance to heat and ozone, contributing to extended service life. Warranty coverage details should be confirmed with the product documentation or supplier.

BrandGates
Part Number18779
PositionMolded Heater Hose, Tee-2 To Reservoir, Heater To Engine, Heater To Pipe-2, and Pipe-1 To Water Pump
MaterialEpdm
End 1 Inside Diameter.62
End 1 Inside Diameter16
End 2 Inside Diameter.62
End 2 Inside Diameter16
Centerline Length14.1
Centerline Length358
Branch Quantity0
9839Yes
98450
Centerline Length (in)14.1
Centerline Length (mm)358
MoldedYes
Number of Quick Connect Fittings0

This part fits 32 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1996FordEscort1.8LL4GASHeater To EngineMolded Heater Hose
1996MazdaMX-31.6LL4GASHeater To Pipe-2Radiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1996MercuryTracer1.8LL4GASHeater To EngineMolded Heater Hose
1995FordEscort1.8LL4GASHeater To EngineMolded Heater Hose
1995Mazda3231.6LL4GASHeater To Pipe-2Molded Heater Hose
1995MazdaMX-31.6LL4GASHeater To Pipe-2Radiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1995MercuryTracer1.8LL4GASHeater To EngineMolded Heater Hose
1994FordEscort1.8LL4GASHeater To EngineMolded Heater Hose
1994Mazda3231.6LL4GASHeater To Pipe-2Molded Heater Hose
1994Mazda3231.8LL4GASHeater To Pipe-2Molded Heater Hose
1994MazdaMX-31.6LL4GASHeater To Pipe-2Radiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1994MazdaProtege1.8LL4GASHeater To Pipe-2Molded Heater Hose
1994MercuryTracer1.8LL4GASHeater To EngineMolded Heater Hose
1993FordEscort1.8LL4GASHeater To EngineMolded Heater Hose
1993Mazda3231.6LL4GASHeater To Pipe-2Molded Heater Hose
1993Mazda3231.8LL4GASHeater To Pipe-2Molded Heater Hose
1993MazdaMX-31.6LL4GASHeater To Pipe-2Radiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1993MazdaProtege1.8LL4GASHeater To Pipe-2Molded Heater Hose
1993MercuryTracer1.8LL4GASHeater To EngineMolded Heater Hose
1992FordEscort1.8LL4GASHeater To EngineMolded Heater Hose
1992Mazda3231.6LL4GASHeater To Pipe-2Molded Heater Hose
1992MazdaMX-31.6LL4GASHeater To Pipe-2Radiator and HVAC compatible coolant and heater hose.; Molded Heater Hose
1992MazdaProtege1.8LL4GASHeater To Pipe-2Molded Heater Hose
1992MercuryTracer1.8LL4GASHeater To EngineMolded Heater Hose
1991FordEscort1.8LL4GASHeater To EngineMolded Heater Hose
1991Mazda3231.6LL4GASHeater To Pipe-2Molded Heater Hose
1991Mazda3231.8LL4GASHeater To Pipe-2Molded Heater Hose
1991MazdaProtege1.8LL4GASHeater To Pipe-2Molded Heater Hose
1991MercuryTracer1.8LL4GASHeater To EngineMolded Heater Hose
1990Mazda3231.6LL4GASHeater To Pipe-2Molded Heater Hose
1990Mazda3231.8LL4GASHeater To Pipe-2Molded Heater Hose
1990MazdaProtege1.8LL4GASHeater To 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:

1077916053M1877945921046318780761513287655BR706124YBR706124YAC87655EA7661212F1CZ 18472 A

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