🔧 Tucson - Radiator Hose Replacement

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

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

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⚠️ Safety & Precautions

• ⚠️ Never open the radiator cap or coolant reservoir cap when the engine is hot. Hot coolant can spray out and cause serious burns.
• ⚠️ Work only with the engine fully cold, ideally after sitting overnight.
• ⚠️ Coolant is poisonous to people and pets. Catch it in a drain pan and clean spills right away.
• ⚠️ Do not drive the vehicle if it overheats after the repair.
• ⚠️ Battery disconnect is not required for this hose replacement.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• Ratchet wrench 3/8-inch drive
• Flat-blade screwdriver 6-inch
• Hose clamp pliers (specialty)
• Needle-nose pliers 6-inch
• Plastic trim clip removal tool
• Drain pan 2-gallon minimum
• Funnel with narrow spout
• Coolant hydrometer or refractometer (specialty)
• Torque wrench 1/4-inch drive
• Nitrile gloves
• Safety glasses
• Shop towels

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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 if replacing lower hose
• Radiator hose clamps - Qty: 2 per hose if clamps are weak, rusty, or damaged
• Hyundai-compatible phosphate-based ethylene glycol coolant - Qty: 1 gallon concentrate or premix as needed
• Distilled water - Qty: 1 gallon if using concentrate

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📋 Before You Begin

• 🅿️ Park your Tucson on level ground and set the parking brake.
• ❄️ Let the engine cool completely before touching any cooling system part.
• 🔍 Identify which hose you are replacing: the upper radiator hose is easier to reach at the top of the radiator; the lower radiator hose is lower and may require under-cover access.
• 🧴 A hose clamp holds the hose tight to the metal or plastic fitting. Spring clamps are squeezed open with pliers; worm clamps loosen with a screwdriver or socket.
• 📦 If replacing only one hose, still inspect both hoses. If one is aged, the other may be close behind.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the hood and remove the engine cover if needed

• Use your hands to lift the plastic engine cover straight up if it blocks access to the upper radiator hose.
• Set the cover aside where it will not get scratched.
• Pull upward evenly at each corner.

Step 2: Remove the lower splash shield if replacing the lower hose

• Use a 10mm socket and ratchet wrench 3/8-inch drive to remove the splash shield bolts under the front of the vehicle.
• Use a plastic trim clip removal tool to remove any plastic push clips.
• Lower the shield and set it aside.
• When reinstalling small splash shield bolts, tighten snug only. If a torque wrench is used, Torque to 7-9 Nm (62-80 in-lbs).

Step 3: Relieve cooling system pressure

• Put on safety glasses and nitrile gloves.
• Slowly loosen the coolant reservoir cap by hand only after the engine is fully cold.
• If you hear any pressure release, stop and wait until it finishes before removing the cap fully.

Step 4: Drain enough coolant

• Place a drain pan 2-gallon minimum under the radiator drain area or under the hose you are replacing.
• If using the radiator drain, open it carefully by hand or with needle-nose pliers 6-inch only if extra grip is needed.
• Drain coolant until the level is below the hose connection.
• If the drain is hard to access, loosen the lowest hose slowly and let coolant drain into the pan.
• Go slowly to avoid a coolant mess.

Step 5: Move the hose clamps back

• For spring clamps, use hose clamp pliers (specialty) to squeeze the clamp tabs together, then slide the clamp a few inches back on the hose.
• For worm-drive clamps, use a flat-blade screwdriver 6-inch to loosen the clamp screw, then slide the clamp back.
• A specialty hose clamp plier locks the clamp open, making it easier and safer for beginners.

Step 6: Remove the old radiator hose

• Use your hands to twist the hose gently side to side to break it loose.
• If it is stuck, use a flat-blade screwdriver 6-inch carefully at the hose edge to help loosen it.
• Do not pry hard against plastic radiator necks. They can crack.
• Pull the hose off both fittings and keep the open ends pointed toward the drain pan.
• Twist first, pull second.

Step 7: Clean and inspect the hose fittings

• Use shop towels to wipe the radiator and engine hose fittings clean.
• Inspect the plastic radiator neck for cracks, chips, or soft spots.
• Inspect the engine-side fitting for corrosion or old rubber stuck to it.
• If a fitting is damaged, do not install the new hose until that part is repaired.

Step 8: Install the new radiator hose

• Compare the new hose to the old hose before installing it. The bends and length should match.
• Slide the clamps onto the new hose first.
• Push the hose fully onto the radiator fitting and engine fitting by hand.
• The hose must sit past the raised bead on each fitting. The bead is the small raised ring that helps seal the hose.
• Do not force a twisted hose.

Step 9: Position and tighten the hose clamps

• For spring clamps, use hose clamp pliers (specialty) to move each clamp back near the end of the hose, behind the raised bead.
• For worm-drive clamps, use a flat-blade screwdriver 6-inch to tighten the clamp until snug.
• Do not overtighten worm clamps on plastic radiator fittings.
• If using screw-type clamps with a torque wrench and suitable driver, Torque to 3-5 Nm (27-44 in-lbs).

Step 10: Close the drain and refill coolant

• Close the radiator drain by hand if it was opened.
• Use a funnel with narrow spout to refill the coolant reservoir with Hyundai-compatible coolant.
• If using concentrate, mix it 50/50 with distilled water before adding it.
• Fill to the proper cold level mark on the reservoir.

Step 11: Bleed air from the cooling system

• Leave the coolant reservoir cap off.
• Start the engine and let it idle.
• Set the heater to maximum temperature and low fan speed using the climate controls.
• Watch the coolant level in the reservoir and add coolant with the funnel with narrow spout as the level drops.
• When the upper radiator hose gets warm and the heater blows warm air, most trapped air has moved out.
• Install the coolant reservoir cap by hand.
• Keep hands away from fans and belts.

Step 12: Reinstall the splash shield and engine cover

• If removed, lift the splash shield into place.
• Use a plastic trim clip removal tool by hand to reinstall push clips.
• Use a 10mm socket and torque wrench 1/4-inch drive to tighten splash shield bolts to Torque to 7-9 Nm (62-80 in-lbs).
• Press the engine cover back down by hand until it seats.

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✅ After Repair

• ✅ Let the engine idle until it reaches normal operating temperature. Watch the temperature gauge closely.
• ✅ Check both hose ends for leaks while wearing safety glasses.
• ✅ Shut the engine off and let it cool completely, then recheck the coolant level.
• ✅ Use a coolant hydrometer or refractometer (specialty) to verify freeze protection if you mixed concentrate and water.
• ✅ Test drive for 10-15 minutes, then inspect again for drips, coolant smell, or overheating.
• ✅ Dispose of old coolant properly. Do not pour it onto the ground or into a drain.

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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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