🔧 F-150 - Radiator Hose Replacement

Replacing a radiator hose means draining some coolant, removing the old hose, installing the new hose, and refilling the cooling system. On your F-150, the upper and lower radiator hoses are both part of the engine cooling system, so replace the hose that is leaking, swollen, cracked, or soft.

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

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⚠️ Safety & Precautions

• ⚠️ Never open the coolant reservoir cap when the engine is hot. Hot coolant can spray out and cause burns.
• 🧤 Wear gloves and safety glasses because coolant is toxic and slippery.
• 🐾 Keep coolant away from pets and children. It tastes sweet but is poisonous.
• 🔋 Battery disconnect is not required for this repair.
• 🌡️ Let the engine cool completely before starting, ideally at least 2-3 hours after driving.
• ♻️ Collect all old coolant in a drain pan and recycle or dispose of it properly.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Large drain pan
• Flat-head screwdriver
• Hose clamp pliers
• Slip-joint pliers
• 8mm socket
• 1/4-inch ratchet
• Plastic trim tool
• Coolant funnel kit
• Clean shop towels
• Flashlight

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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
• Motorcraft-compatible orange coolant concentrate or premixed coolant - Qty: 1-2 gallons
• Distilled water - Qty: 1-2 gallons 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 fully cool before touching the cooling system.
• 🧰 Open the hood and use a flashlight to identify the hose you are replacing.
• 📌 The upper radiator hose runs from the top area of the radiator to the engine. The lower radiator hose runs from the lower radiator area toward the engine/water pump area.
• 🧪 Use the correct coolant type. Mixing incompatible coolants can cause sludge or cooling system problems.
• 🪛 A hose clamp plier squeezes spring-style hose clamps so they can slide back on the hose.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Let the Engine Cool

• Use your hand carefully near the upper radiator hose to check for heat, without touching hot metal parts.
• If the hose or coolant reservoir feels warm or pressurized, wait longer.
• Cold engine only.

Step 2: Remove the Coolant Reservoir Cap

• Use gloves and safety glasses.
• Slowly turn the coolant reservoir cap by hand counterclockwise.
• If you hear pressure escaping, stop and wait until it finishes before removing the cap fully.

Step 3: Position the Drain Pan

• Place a large drain pan under the radiator area below the hose you are replacing.
• Use a flashlight to make sure the pan is centered under the hose connection.
• Coolant may splash when the hose comes loose.

Step 4: Drain Enough Coolant

• If replacing the upper radiator hose, you only need to lower the coolant level below the upper hose connection.
• If replacing the lower radiator hose, expect most of the radiator coolant to drain out.
• If equipped with an accessible radiator drain, use a flat-head screwdriver to carefully open the drain and let coolant flow into the pan.
• If the drain is not easily accessible, drain by loosening the hose slowly in the next step.

Step 5: Release the Hose Clamps

• Use hose clamp pliers to squeeze the tabs on the spring clamp.
• Slide the clamp several inches back onto the hose.
• If your replacement hose uses worm-drive clamps, use an 8mm socket and 1/4-inch ratchet to loosen them.
• Repeat this on both ends of the hose.

Step 6: Remove the Old Hose

• Twist the hose gently by hand to break it loose from the radiator or engine fitting.
• If it is stuck, use slip-joint pliers to gently rotate the hose, not crush the fitting.
• Use a plastic trim tool to help lift the hose edge if needed.
• Do not pry hard on plastic radiator fittings because they can crack.
• Pull the hose off and let coolant drain into the pan.
• Twist first, pull second.

Step 7: Clean the Hose Fittings

• Use clean shop towels to wipe the radiator and engine hose fittings.
• Use a flashlight to inspect the fittings for cracks, corrosion, or leftover rubber pieces.
• Do not use sandpaper or a metal scraper on plastic radiator fittings.

Step 8: Install the New Hose

• Compare the new radiator hose to the old one by hand before installing it.
• Slide the clamps onto the new hose before pushing the hose onto the fittings.
• Push the hose fully onto the radiator and engine fittings until it seats past the raised bead.
• The raised bead is the small ridge on the fitting that helps keep the hose from sliding off.

Step 9: Position and Tighten the Clamps

• Use hose clamp pliers to move spring clamps back into their original positions, just behind the raised bead.
• If using worm-drive clamps, use an 8mm socket and 1/4-inch ratchet to snug the clamps evenly.
• Do not overtighten worm-drive clamps on plastic fittings.
• Torque to snug only; no published clamp torque is required for standard service hose clamps.

Step 10: Refill the Cooling System

• Install a coolant funnel kit on the coolant reservoir opening.
• Pour the correct coolant mixture into the reservoir slowly.
• If using concentrate, mix coolant and distilled water to a 50/50 mix before filling.
• Fill to the cold fill range marked on the reservoir.

Step 11: Bleed Air from the Cooling System

• Leave the coolant funnel kit installed.
• Start the engine and let it idle.
• Set the heater controls inside the cab to full hot and low fan speed.
• Watch the coolant level in the funnel and add coolant if the level drops.
• Let the engine warm up until the upper radiator hose gets warm and the heater blows hot air.
• Use a flashlight to check the hose connections for leaks while the engine idles.

Step 12: Finalize the Coolant Level

• Turn the engine off and let it cool completely.
• Remove the coolant funnel kit carefully.
• Install the coolant reservoir cap by hand until fully seated.
• After the engine cools, recheck the coolant level and top off to the cold fill range if needed.

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✅ After Repair

• ✅ Start the engine and check for leaks around both ends of the new hose.
• 🌡️ Watch the temperature gauge during the first drive. It should stay in the normal range.
• 🔥 Confirm the heater blows warm air after the engine reaches operating temperature.
• 🧪 Recheck coolant level the next morning when the engine is cold.
• 🔍 Inspect the hose again after 1-2 short drives for seepage or clamp movement.
• ♻️ Take old coolant to a proper recycling or hazardous waste location.

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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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