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How-to » Preventive Maintenance » Belts & Hoses » How to Replace Heater Core Hoses
 Note: This is a general guide and may not apply to your vehicle.

How to Replace Heater Core Hoses

for the 2005 Ford F-150 XLT 8 Cyl 5.4L change
PARTS
  • Heater Hose
  • Hose Clamp
TOOLS
  • Screwdriver
  • Cooling System Pressure Tester
  • 3 more tools
STEPS
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Safety Tip:
Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or closed toe shoes.

1
Open the hood and locate the heater core hoses.
2
Inspect the heater core hoses for signs of leaking.
3
If you cannot find where the coolant is leaking from, pressure test the system - with the engine and cooling system cold - and re-inspect for leaking. When pressure testing, be sure not to exceed the radiator cap / system pressure rating.
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4
Release pressure from cooling system after finding leak.
5
Drain the cooling system.
6
Loosen hose clamps and carefully remove the leaking hose.
7
Install the new hose, install new hose clamps, and refill cooling system with recommended anti-freeze / water mixture at 50/50 concentration.
8
Pressure test cooling system again to check for any other leaks. Repair any new leaks.
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9
Start engine and let it reach operating temperature. Let engine cool down and re-check coolant level.
10
Install radiator cap, close the engine compartment hood, test drive.
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