🔧 Tucson - Radiator Hose Replacement

This repair replaces a leaking, swollen, cracked, or soft radiator hose on your Tucson. The radiator hoses carry hot coolant between the engine and radiator, so the system must be cool before opening it.

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

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⚠️ Safety & Precautions

• ⚠️ Never remove the radiator cap or coolant reservoir cap when the engine is hot. Hot coolant can spray out and cause severe burns.
• 🧤 Wear gloves and safety glasses. Coolant is slippery and harmful to skin, pets, and the environment.
• 🚗 Work on level ground with the engine completely cool.
• 🔋 Battery disconnect is not normally required for radiator hose replacement on your Tucson.
• ♻️ Collect old coolant in a drain pan and recycle it properly. Do not pour coolant on the ground or into drains.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Drain pan 2-gallon minimum
• Flat-blade screwdriver 6-inch
• Hose clamp pliers 45-degree (specialty)
• Slip-joint pliers 10-inch
• Pick tool 90-degree
• 10mm socket
• 3/8-inch ratchet
• Funnel spill-free coolant fill kit (specialty)
• Shop towels
• Plastic scraper
• Torque wrench inch-pound 1/4-inch drive

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Upper radiator hose - Qty: 1
• Lower radiator hose - Qty: 1
• Radiator hose clamps - Qty: 4
• Hyundai-compatible ethylene glycol coolant concentrate - Qty: 1 gallon
• Distilled water - Qty: 1 gallon

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📋 Before You Begin

• 🅿️ Park your Tucson on level ground, shift to Park, and set the parking brake.
• ❄️ Let the engine cool fully. A safe wait time is usually at least 2-3 hours after driving.
• 🧊 Confirm the upper radiator hose feels cool and soft before opening the cooling system.
• 🪣 Place a drain pan under the radiator area before loosening any hose.
• 📌 If replacing only one hose, still inspect the other hose. Replace both if they are swollen, cracked, oil-soaked, or mushy.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the Engine Cover Area Access if Needed

• Use your hands to remove any loose plastic beauty cover if it blocks access.
• Use a 10mm socket and 3/8-inch ratchet to remove any small access fasteners if needed.
• Set fasteners aside in a cup so they do not get lost.
• Take a photo first.

Step 2: Slowly Open the Coolant Reservoir Cap

• Put on safety glasses and nitrile gloves.
• Use a shop towel over the coolant reservoir cap.
• Slowly loosen the cap by hand to release any leftover pressure.
• If you hear pressure hissing, stop and wait until it ends before fully removing the cap.

Step 3: Drain Some Coolant

• Place a drain pan 2-gallon minimum under the lower radiator hose area.
• If your radiator drain petcock is accessible, use your hand or a flat-blade screwdriver 6-inch to open it slowly.
• If the drain petcock is not easy to access, drain by removing the lower hose in the next step.
• Drain enough coolant so the hose connection is below the coolant level.
• Close the drain petcock by hand if used. Do not overtighten plastic parts.

Step 4: Remove the Upper Radiator Hose

• A hose clamp is the metal band that squeezes the hose tight to stop leaks.
• Use hose clamp pliers 45-degree or slip-joint pliers 10-inch to squeeze the clamp tabs together.
• Slide the clamp back several inches from the hose end.
• Repeat on the other end of the upper radiator hose.
• Use a pick tool 90-degree carefully between the hose and fitting to break the hose loose.
• Twist the hose by hand, then pull it off.
• Use shop towels to catch coolant drips.
• Twist first, then pull.

Step 5: Remove the Lower Radiator Hose

• Move the drain pan 2-gallon minimum directly under the lower hose.
• Use hose clamp pliers 45-degree or slip-joint pliers 10-inch to compress the lower hose clamp.
• Slide the clamp away from the hose end.
• Use the pick tool 90-degree gently to loosen the hose seal.
• Pull the lower hose off by hand and let the coolant drain into the pan.
• Repeat for the engine-side end of the lower hose.

Step 6: Clean the Hose Fittings

• Use a plastic scraper to remove stuck rubber, dried coolant, or crust from each hose fitting.
• Wipe the fittings clean with shop towels.
• Do not gouge aluminum or plastic fittings.
• The hose sealing area should feel smooth before installing the new hose.

Step 7: Install the New Lower Radiator Hose

• Compare the new lower radiator hose with the old one to confirm the bends and length match.
• Slide the new radiator hose clamps onto the hose before installing it.
• Push the hose fully onto the radiator and engine fittings by hand.
• Use hose clamp pliers 45-degree to position each clamp behind the raised bead on the fitting.
• If using screw-style clamps, tighten with a flat-blade screwdriver 6-inch and torque wrench inch-pound 1/4-inch drive.
• Torque screw-style hose clamps to 3-4 Nm (27-35 in-lbs).
• Do not overtighten. Too much force can crack plastic radiator necks.

Step 8: Install the New Upper Radiator Hose

• Compare the new upper radiator hose with the old one.
• Slide the new radiator hose clamps onto the hose.
• Push the hose fully onto the radiator and engine fittings by hand.
• Use hose clamp pliers 45-degree to place spring clamps in the same locations as the original clamps.
• If using screw-style clamps, use a flat-blade screwdriver 6-inch and torque wrench inch-pound 1/4-inch drive.
• Torque screw-style hose clamps to 3-4 Nm (27-35 in-lbs).
• Make sure the hose is not twisted or rubbing against sharp edges.

Step 9: Refill the Cooling System

• Install a funnel spill-free coolant fill kit at the coolant reservoir or radiator fill point, depending on access.
• Mix Hyundai-compatible ethylene glycol coolant concentrate with distilled water at a 50/50 ratio if using concentrate.
• Slowly pour coolant through the funnel until the reservoir reaches the full mark.
• Squeeze the upper radiator hose by hand several times to help push out trapped air.
• Keep extra coolant nearby because the level may drop while air escapes.

Step 10: Bleed Air from the Cooling System

• Start the engine and let it idle with the funnel spill-free coolant fill kit installed.
• Set the cabin heat to maximum temperature and fan to low using the climate controls.
• Watch the coolant level in the funnel. Add coolant as the level drops.
• Let the engine idle until the radiator fan cycles on or the upper hose becomes hot.
• Use shop towels to wipe any spills immediately.
• Do not touch the fan area while the engine is running.

Step 11: Check for Leaks

• With the engine idling, use a flashlight if available and visually inspect each hose end.
• Look for dripping, spraying, or white/green coolant residue.
• If a hose seeps, shut the engine off and let it cool before adjusting the clamp.
• Use hose clamp pliers 45-degree or flat-blade screwdriver 6-inch as needed to reposition or tighten the clamp.

Step 12: Reinstall Removed Access Parts

• Use a 10mm socket and 3/8-inch ratchet to reinstall any removed access fasteners.
• Torque small 10mm access fasteners to 7-10 Nm (62-89 in-lbs).
• Reinstall any plastic cover by pressing it straight down by hand.

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✅ After Repair

• ✅ Let the engine cool fully, then recheck the coolant level in the reservoir.
• ➕ Add 50/50 coolant mixture until the level is between the LOW and FULL marks.
• 🚗 Take a short 10-15 minute test drive while watching the temperature gauge.
• 🔍 Park, let it cool, then inspect all hose connections again for leaks.
• ♻️ Recycle old coolant at a proper fluid recycling center or parts store that accepts coolant.
• ⚠️ If the temperature gauge rises above normal, stop driving and shut the engine off.

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💰 DIY vs Shop Cost

Shop Cost: $180-$350 (parts + labor)

DIY Cost: $45-$120 (parts only)

You Save: $135-$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?

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.