What is the primary function of the upper radiator hose?

The upper radiator hose carries hot coolant from the engine's thermostat housing to the radiator. This allows the coolant to be cooled before circulating back into the engine.

Why is a molded hose important?

A molded hose has the specific shape and bends required for your vehicle's engine bay. This ensures it fits correctly without kinking or rubbing, which is crucial for proper coolant flow and hose longevity.

What other cooling system components should I check when replacing this hose?

When replacing the upper radiator hose, it's recommended to also inspect and potentially replace the lower radiator hose and the thermostat. These parts often wear out around the same time and are easily accessible during the hose replacement job.

Gates Upper Radiator Hose 2002-2007 International/Navistar 4

Name: Gates 02-07 International/Navistar 4300 Diesel Upper Eng. To Rad. Molded Coolant Hose
Brand: Gates
SKU: gates-gates-02-07-international-navistar-4300-diesel-upper-eng-to-rad-molded-coo-t14-876741
Price: 61.68 USD
Availability: BackOrder

Gates 02-07 International/Navistar 4300 Diesel Upper Eng. To Rad. Molded Coolant Hose

$61.68

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Gates upper radiator hose for 2002-2007 International/Navistar 4300 Diesel. Ensures proper engine cooling.

Key Features

Fits 2002-2007 International/Navistar 4300 Diesel.
Connects engine to radiator for coolant flow.
Molded design for a direct fit.
Durable rubber construction withstands heat and pressure.

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Product Details

When you're working on the cooling system for your 2002-2007 International or Navistar 4300 with a diesel engine, replacing the upper radiator hose is a common and important task. This hose connects the engine's thermostat housing to the top of the radiator, allowing coolant to flow from the engine to be cooled. A cracked or leaking hose can quickly lead to overheating, leaving you stranded.

This molded hose from Gates is built to fit your specific application, meaning it has the correct bends and connections to install without a struggle. Gates uses durable rubber compounds designed to withstand the high temperatures and pressures found in a diesel cooling system. This helps ensure a long service life and reliable performance, keeping your engine running at the right temperature.

It's always a good idea to inspect your lower radiator hose and thermostat at the same time you replace the upper hose, as these components often wear out around the same interval. Having the right parts on hand can make the job go much smoother.