HomeBelts and Cooling > Hoses and PipesGates 20509 Radiator Coolant Hose - Lower
Part #: 20509

Gates 20509 Radiator Coolant Hose - Lower

Molded Coolant Hose, Lower
4 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Molded Coolant Hose, Lower
Fitment: Ford and Mercury, Country Sedan, Country Squire, Custom, Custom 500, Galaxie, Galaxie 500, Ranch Wagon, Colony Park, Commuter, Marauder, Montclair, Monterey, and Park Lane
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Overview of Gates Molded Coolant Hose 20509

The Gates Molded Coolant Hose 20509 is designed specifically for Mercury vehicles, including the Colony Park and Marauder models. This radiator coolant hose is engineered to meet the cooling system requirements of these vehicles, ensuring reliable performance and durability.

  • Constructed from durable EPDM material for heat and chemical resistance
  • Molded design for precise fit and secure installation
  • End 1 inside diameter: 1.75 inches (44 mm)
  • End 2 inside diameter: 2.07 inches (53 mm)
  • Centerline length of 16.5 inches (419 mm)
  • Contains no internal spring, reducing potential failure points
  • Compatible with Mercury Colony Park and Marauder models

Details on the Molded Coolant Hose Product Line

The Molded Coolant Hose line by Gates focuses on providing pre-formed hoses that match original equipment specifications. This eliminates the need for bending or cutting during installation, reducing the risk of leaks or improper fitment. The molded construction of part number 20509 ensures consistent shape and dimensions, which is critical for maintaining proper coolant flow and system integrity in Mercury vehicles.

Product Description and Specifications

This radiator coolant hose is made from EPDM, a synthetic rubber known for its excellent resistance to heat, ozone, and coolant chemicals. The hose features two different inside diameters at each end—1.75 inches (44 mm) on one side and 2.07 inches (53 mm) on the other—allowing it to connect securely between components with varying sizes. With a centerline length of 16.5 inches (419 mm), it fits precisely within the cooling system layout of the Mercury Colony Park and Marauder. The absence of an internal spring reduces the risk of hose collapse or damage under pressure.

Common Applications and Problem Solving

  • Replacement of worn or cracked radiator coolant hoses in Mercury Colony Park and Marauder
  • Resolving coolant leaks caused by hose deterioration or improper fit
  • Preventing overheating issues related to compromised coolant flow
  • Addressing hose swelling or softening due to chemical exposure
  • Ensuring secure connections between radiator and engine components

Installation Notes and Tips

When installing the Gates Molded Coolant Hose 20509, ensure the vehicle is cool and the cooling system is depressurized. Verify the hose orientation matches the molded shape to avoid kinks or stress points. Use appropriate clamps to secure each end, matching the specified inside diameters of 1.75 inches and 2.07 inches. Inspect adjacent components for wear or damage during replacement to maintain system integrity.

Quality Assurance and Warranty

Gates manufactures the Molded Coolant Hose 20509 to meet or exceed OEM standards for fit, form, and function. The EPDM material and molded design contribute to long service life under typical operating conditions. While specific warranty details are not provided here, Gates products generally come with a limited warranty against defects in material and workmanship. Consult product documentation or authorized sources for exact warranty terms.

BrandGates
Part Number20509
PositionMolded Coolant Hose, Lower
0
Yes
Branch Quantity0
Centerline Length16.5
Centerline Length419
Contains SpringNo
End 1 Inside Diameter1.75
End 1 Inside Diameter44
End 2 Inside Diameter2.07
End 2 Inside Diameter53
MaterialEPDM
Modular HoseNo
MoldedYes
Number of Quick Connect Fittings0

This part fits 4 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1964MercuryColony Park6.4LV8GASLowerMolded Coolant Hose
1964MercuryColony Park7.0LV8GASLowerMolded Coolant Hose
1964MercuryMarauder6.4LV8GASLowerMolded Coolant Hose
1964MercuryMarauder7.0LV8GASLowerMolded 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:

20030S205096047570314704477304BH-859BH-993C0AA88277GC4AE 8286 DC4AZ 8286 AC4AZ 8286 DC4ME 8286 AC5SE 8286 AC70447COAA 8286 DCOAA88277ACOAA88277DCOAA88277KCOAZ 8286 FCOAZ8286COCA 8286 DKM-128KM-174KM-213KM-305KM-306KM-310MR729MR752

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