🔧 Radiator Hose - Replacement

This guide covers replacing the upper or lower radiator hose on your F-150. A radiator hose carries coolant between the engine and radiator, and it should be replaced if it is cracked, swollen, leaking, soft, or oil-contaminated.

Difficulty Level: Beginner | Estimated Time: 1-2 hours

Assumption: Steps cover both upper and lower radiator hoses; replace the leaking or damaged hose only unless both are worn.

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⚠️ Safety & Precautions

• ⚠️ Never open the cooling system when hot. Hot coolant can spray out and cause severe burns.
• ⚠️ Let the engine cool completely, ideally 2-3 hours after driving.
• ⚠️ Coolant is poisonous to people and pets. Catch it in a drain pan and dispose of it properly.
• ⚠️ Do not mix random coolant types. Use Ford-approved coolant compatible with your F-150.
• ⚠️ Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Drain pan 2-gallon minimum
• Flathead screwdriver
• Hose clamp pliers
• Slip-joint pliers
• Pick tool set
• Plastic trim clip remover
• 8mm socket
• 10mm socket
• Ratchet 3/8-inch drive
• Funnel
• Clean shop towels
• Coolant hydrometer or refractometer

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Radiator hose - Qty: 1
• Radiator hose clamps - Qty: 2
• Ford-approved engine coolant concentrate or premix - Qty: 1-2 gallons
• Distilled water - Qty: 1 gallon if using concentrate

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📋 Before You Begin

• 🅿️ Park your F-150 on level ground and set the parking brake.
• 🌡️ Make sure the engine is completely cool before touching the radiator cap, degas bottle cap, or hoses.
• 🧰 A hose clamp plier is a tool that squeezes spring clamps open so the hose can slide off safely.
• 🧰 A pick tool is a small hooked tool used to loosen a stuck hose from its fitting without cutting the metal or plastic connection.
• ♻️ Place a drain pan under the front of the truck before removing any hose.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Let the Engine Cool

• Use your hand near, not on, the upper radiator hose to check for heat.
• If the hose area feels warm, wait longer before starting.
• Slowly loosen the coolant reservoir cap by hand only after the engine is fully cool.
• Cold engine only.

Step 2: Remove Any Splash Shield Access Panel

• Use a plastic trim clip remover to remove plastic push clips if equipped.
• Use an 8mm socket or 10mm socket with a 3/8-inch ratchet to remove lower shield fasteners if they block access.
• Set all clips and bolts aside in order so they go back in the same spots.

Step 3: Drain Enough Coolant

• Place the 2-gallon drain pan under the radiator drain area or under the hose you are replacing.
• If using the radiator drain, open it carefully by hand or with slip-joint pliers only if needed.
• Drain coolant until the level is below the hose being replaced.
• If the drain is hard to access, use hose clamp pliers and remove the lower end of the hose slowly, letting coolant flow into the pan.
• Go slow to avoid spills.

Step 4: Release the Hose Clamps

• Use hose clamp pliers to squeeze each spring clamp open.
• Slide each clamp several inches back onto the hose.
• If screw-style clamps are installed, use a flathead screwdriver to loosen them.
• Do not pry hard on plastic radiator fittings because they can crack.

Step 5: Remove the Old Radiator Hose

• Twist the hose by hand to break it loose from the radiator or engine fitting.
• If the hose is stuck, use a pick tool to gently work around the hose edge.
• Pull the hose straight off once it breaks free.
• If replacing the lower hose, keep the drain pan directly underneath because more coolant will come out.
• Twist first, pull second.

Step 6: Clean the Hose Connections

• Use clean shop towels to wipe the radiator and engine hose fittings.
• Remove old coolant residue, dirt, or rubber pieces.
• Inspect the fittings for cracks, corrosion, or rough edges before installing the new hose.

Step 7: Install the New Hose

• Compare the new radiator hose to the old hose before installing it.
• Slide the new clamps onto the hose first.
• Push the hose fully onto each fitting by hand until it seats past the raised bead on the fitting.
• A raised bead is the lip on the fitting that helps keep the hose from sliding off.
• Use hose clamp pliers to position each clamp behind the raised bead.
• If using screw-style clamps, tighten with a flathead screwdriver until snug. Do not overtighten.

Step 8: Close the Drain and Reinstall Shields

• Close the radiator drain by hand if it was opened.
• Use the 8mm socket or 10mm socket with the 3/8-inch ratchet to reinstall any splash shield fasteners.
• Reinstall plastic clips with the plastic trim clip remover or by pressing them in by hand.
• Torque small splash shield fasteners to 5-8 Nm (44-71 in-lbs) if threaded fasteners are used.

Step 9: Refill the Cooling System

• Use a funnel to fill the coolant reservoir with the correct Ford-approved coolant mixture.
• If using concentrate, mix coolant with distilled water to a 50/50 mix unless the bottle is already premixed.
• Fill to the cold fill mark on the coolant reservoir.
• Install the coolant reservoir cap by hand.

Step 10: Bleed Air from the Cooling System

• Start the engine and let it idle with the heater set to full hot and fan on low.
• Watch the temperature gauge. It should rise normally and stay steady.
• Let the engine idle until the upper radiator hose gets warm, showing coolant is circulating.
• Shut the engine off and let it cool completely.
• Use the funnel to top off the coolant reservoir to the cold fill mark after it cools.

Step 11: Check Coolant Strength

• Use a coolant hydrometer or refractometer to confirm the coolant freeze protection is correct.
• A refractometer is a small tester that checks coolant concentration using a drop of coolant.
• For normal use, a 50/50 coolant mix is the usual target.

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✅ After Repair

• ✅ Check around both hose ends for leaks while the engine is running.
• ✅ After the first drive, let your F-150 cool completely and recheck the coolant level.
• ✅ Recheck the hose clamps after one heat cycle to make sure they stayed seated.
• ✅ If the temperature gauge rises above normal, shut the engine off and let it cool before inspecting.
• ✅ Dispose of old coolant at a recycling center or parts store that accepts used coolant.

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💰 DIY vs Shop Cost

Shop Cost: $180-$350 parts + labor

DIY Cost: $35-$120 parts only

You Save: $145-$230 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-1.5 hours.

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🎯 Ready to get started?

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