🔧 Focus - Radiator Hose Replacement

On your Focus, the radiator hoses carry coolant between the engine and radiator. Replacing a leaking, swollen, or cracked hose prevents overheating and coolant loss.

Difficulty Level: Intermediate | Estimated Time: 1.0-2.0 hours

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⚠️ Safety & Precautions

• ⚠️ Never open the coolant reservoir cap on a hot engine; hot coolant can spray and burn.
• ⚠️ Support the car with jack stands if you lift it—never rely on a jack alone.
• ⚠️ Keep coolant off belts and electrical connectors; wipe spills immediately.
• ⚠️ Coolant is toxic—catch and dispose of it properly.
• Battery disconnect is not required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• Drain pan (at least 2-gallon)
• Hose clamp pliers (specialty)
• Slip-joint pliers
• Pick tool set
• Flat-blade screwdriver
• 8mm socket
• 1/4" ratchet
• Funnel
• Trim clip remover (specialty)
• Shop rags
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Radiator hose (upper) - Qty: 1
• Radiator hose (lower) - Qty: 1
• Hose clamps (matching type/size) - Qty: 2-4
• Engine coolant (Ford/Motorcraft-approved; match what’s on reservoir cap) - Qty: 1-2 gallons
• Distilled water - Qty: 1-2 gallons

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Let the engine cool completely (ideally 2+ hours).
• Slowly loosen the coolant reservoir cap to release any residual pressure, then retighten it.
• If you need more access underneath, lift the front with a floor jack and support with jack stands.
• “Spring clamp” = clamp you squeeze with pliers.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Identify the hose you’re replacing

• The upper radiator hose runs from the top of the radiator to the engine/thermostat housing area.
• The lower radiator hose runs from the bottom of the radiator down to the engine area.
• Use a flashlight to trace the hose from the radiator tank to the engine connection.

Step 2: Drain enough coolant to get the hose off cleanly

• Place a drain pan (at least 2-gallon) under the radiator/lower hose area.
• If equipped/accessible, open the radiator drain (petcock) by hand or with a flat-blade screwdriver just enough to start flow.
• If the drain isn’t accessible, you can drain by loosening the lower hose clamp (next step) and letting coolant flow into the pan.

Step 3: Remove the hose clamps

• For spring clamps: squeeze the clamp with hose clamp pliers (specialty) and slide it back on the hose.
• For worm-gear clamps: loosen with an 8mm socket and 1/4" ratchet or a flat-blade screwdriver.
• Torque note: Spring clamps have no torque spec. Worm-gear clamps are tightened snug—do not crush the plastic radiator neck.

Step 4: Break the hose loose (without damaging the fitting)

• Twist the hose by hand to break it free.
• If it’s stuck, carefully work around the edge with a pick tool set to separate the hose from the fitting.
• Pull the hose off and direct any remaining coolant into the drain pan.
• Don’t pry hard on plastic radiator necks.

Step 5: Prepare the new hose

• Compare the new hose to the old one (length, bends, end diameters).
• Slide the new clamps onto the hose before installation (use hose clamp pliers (specialty) if spring clamps).
• Wipe the radiator and engine fittings clean with shop rags.

Step 6: Install the new hose

• Push the hose fully onto each fitting until it seats against the stop/bead.
• Position the clamps in the same location as original (behind the raised bead on the fitting).
• Tighten worm-gear clamps with an 8mm socket and 1/4" ratchet until snug, or release spring clamps using hose clamp pliers (specialty).

Step 7: Refill coolant

• Mix coolant with distilled water if you bought concentrate (use a funnel and follow the coolant label for mix ratio).
• Fill the coolant reservoir slowly using a funnel to the MAX line.
• Leave the reservoir cap off for initial air purge (next step).

Step 8: Bleed air and check for leaks

• Start the engine and set the heater to HOT with the fan on medium.
• Let it idle and watch the coolant level in the reservoir; add as needed using a funnel.
• When the engine warms up, you should feel the radiator hose get hot as the thermostat opens.
• Once the level stabilizes, install the reservoir cap by hand.
• Inspect both hose ends carefully with a flashlight for seepage.

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✅ After Repair

• Test drive 10-15 minutes, then recheck the reservoir level after it cools; top off if needed.
• Look under the car for drips and recheck clamp position if you see any wetness.
• If the temperature gauge climbs higher than normal, stop and recheck coolant level/air in system.
• Dispose of old coolant properly (parts stores often accept used fluids).

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💰 DIY vs Shop Cost

Shop Cost: $250-$550 (parts + labor)

DIY Cost: $40-$160 (parts only)

You Save: $210-$390 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-2.0 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.