🔧 Tucson - Radiator Hose Replacement

This repair replaces a leaking, swollen, cracked, or soft radiator hose on your Tucson. The upper and lower radiator hoses carry hot coolant between the engine and radiator, so the cooling system must be opened carefully and refilled afterward.

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

---

⚠️ Safety & Precautions

• ⚠️ Only work on the cooling system when the engine is completely cold. Hot coolant can spray out and cause serious burns.
• 🧤 Wear safety glasses and gloves. Coolant is slippery, toxic, and harmful to pets.
• 🚫 Do not remove the radiator cap or reservoir cap when the engine is warm.
• 🧊 Let the Tucson sit at least 2-3 hours after driving before starting.
• 🔋 Battery disconnect is not normally required for radiator hose replacement.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Drain pan 2-gallon minimum
• Funnel with narrow neck
• Pliers 10-inch
• Hose clamp pliers (specialty)
• Flat-blade screwdriver 6-inch
• Pick tool 90-degree
• 10mm socket
• 3/8-inch ratchet
• 3/8-inch extension 6-inch
• Clean shop towels
• Torque wrench inch-pound

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Upper radiator hose - Qty: 1 if replacing upper hose
• Lower radiator hose - Qty: 1 if replacing lower hose
• Radiator hose clamps - Qty: 2 per hose if replacing clamps
• Hyundai-compatible ethylene glycol coolant concentrate - Qty: 1 gallon
• Distilled water - Qty: 1 gallon if using concentrate
• Premixed 50/50 Hyundai-compatible coolant - Qty: 1-2 gallons if not using concentrate

---

📋 Before You Begin

• 🚗 Park your Tucson on level ground and set the parking brake.
• 🧊 Make sure the engine is fully cold before opening the cooling system.
• 🪣 Place a drain pan under the radiator area before loosening any hose.
• 📌 A hose clamp is the metal band that squeezes the hose tight so coolant cannot leak.
• 📌 Hose clamp pliers are pliers shaped to squeeze spring clamps evenly and safely.
• 📌 If the coolant is old, dirty, rusty, or contaminated, replace more coolant instead of only topping off.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the Hood and Verify the Cold Engine

• Use your hand carefully near the radiator area to confirm there is no heat coming from the engine.
• Use safety glasses and nitrile gloves before touching coolant parts.
• Slowly loosen the coolant reservoir cap by hand only if the engine is cold.
• Cold engine only. No exceptions.

Step 2: Position the Drain Pan

• Use a drain pan 2-gallon minimum and place it under the radiator hose you are replacing.
• For the upper radiator hose, place the pan under the upper radiator outlet area.
• For the lower radiator hose, place the pan under the lower radiator outlet area because more coolant will drain.

Step 3: Remove Any Access Cover if Needed

• Use a 10mm socket, 3/8-inch ratchet, and 3/8-inch extension to remove any small access fasteners blocking the hose area.
• Set the fasteners aside in order so they go back in the same locations.
• Reinstall 10mm cover bolts later and tighten gently; typical small cover fasteners are snug only, about Torque to 5-8 Nm (44-71 in-lbs).

Step 4: Loosen the First Hose Clamp

• Use hose clamp pliers to squeeze the spring clamp tabs together.
• Slide the clamp back along the hose about 1-2 inches.
• If your Tucson has worm-drive screw clamps, use a flat-blade screwdriver 6-inch to loosen the clamp screw.
• Do not pry against the plastic radiator neck. It can crack.

Step 5: Loosen the Second Hose Clamp

• Use hose clamp pliers to squeeze and move the clamp on the other end of the hose.
• For screw-style clamps, use a flat-blade screwdriver 6-inch and loosen only enough to move the clamp.
• Keep the clamps on the old hose until it is off so you can compare positions.

Step 6: Break the Hose Free

• Use your hand to twist the hose gently back and forth to break it loose.
• If it is stuck, use a pick tool 90-degree to carefully lift the hose edge and break the seal.
• Do not dig into the radiator neck or engine outlet with the pick tool.
• If the hose is being replaced anyway, use pliers 10-inch to grip and twist the hose gently, not the radiator neck.
• Twist first, pull second.

Step 7: Remove the Old Hose

• Use your hands to pull one end of the hose off first, then remove the other end.
• Let coolant drain into the drain pan.
• Use clean shop towels to wipe spilled coolant from nearby parts.
• Compare the old hose to the new hose before installing. The bends and length must match.

Step 8: Clean the Hose Connections

• Use clean shop towels to wipe the radiator neck and engine outlet clean.
• Use a pick tool 90-degree only to remove stuck rubber pieces if needed.
• Do not scratch or gouge the sealing surfaces.
• Check the radiator neck for cracks before installing the new hose.

Step 9: Install the New Hose

• Use your hands to slide the new radiator hose fully onto both fittings.
• Push the hose until it seats past the raised bead on each fitting. The bead is the small ridge that helps hold the hose in place.
• Make sure the hose is not twisted and does not rub the fan, belts, pulleys, or sharp brackets.

Step 10: Position and Tighten the Clamps

• Use hose clamp pliers to move spring clamps back to their original positions behind the raised bead.
• If using screw-style clamps, use a flat-blade screwdriver 6-inch and tighten evenly.
• For screw-style clamps, use an inch-pound torque wrench if the clamp has a torque spec and tighten to Torque to 3-5 Nm (27-44 in-lbs).
• Do not overtighten clamps. Too much force can damage the hose or plastic radiator neck.

Step 11: Refill the Cooling System

• Use a funnel with narrow neck at the coolant reservoir or radiator fill point, depending on access.
• Add Hyundai-compatible 50/50 coolant slowly until the reservoir reaches the “FULL” mark.
• If using concentrate, mix coolant and distilled water 50/50 before adding it.
• Use clean shop towels to wipe any spilled coolant immediately.

Step 12: Bleed Air from the Cooling System

• Start the engine and let it idle with the heater set to full hot and blower on low.
• Watch the temperature gauge. It should rise normally and stay near the middle.
• As air escapes, the coolant level may drop. Use the funnel with narrow neck to add more 50/50 coolant as needed.
• Let the engine idle until the upper radiator hose gets warm, showing the thermostat has opened.
• Install the cap by hand once the coolant level stabilizes.

Step 13: Check for Leaks

• Use a flashlight if available and inspect both hose ends closely.
• Use clean shop towels to dry the hose connections, then look for fresh wetness.
• If a clamp seeps, shut the engine off, let it cool, then reposition or gently tighten the clamp.

Step 14: Reinstall Any Removed Covers

• Use a 10mm socket, 3/8-inch ratchet, and 3/8-inch extension to reinstall any access cover fasteners.
• Tighten small cover bolts to Torque to 5-8 Nm (44-71 in-lbs).

---

✅ After Repair

• ✅ Take a short 5-10 minute test drive while watching the temperature gauge.
• 🧊 Let the Tucson cool completely, then recheck the coolant level and top off to the correct mark.
• 🔍 Recheck both hose ends for leaks after the first drive and again the next day.
• ♻️ Dispose of old coolant properly. Do not pour it on the ground or into drains.
• ⚠️ If the temperature gauge rises above normal, stop driving and shut the engine off safely.

---

💰 DIY vs Shop Cost

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

DIY Cost: $25-$90 (parts only)

You Save: $155-$260 by doing it yourself!

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

---

🎯 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.