🔧 Tucson - Radiator Hose Replacement

Replacing a radiator hose means draining some coolant, removing the old hose, installing the new hose, and refilling/bleeding the cooling system. On your Tucson, the upper and lower radiator hoses are rubber coolant hoses that carry hot engine coolant between the radiator and engine.

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

---

⚠️ Safety & Precautions

• ⚠️ Never open the radiator cap or coolant reservoir cap when the engine is hot. Hot coolant can spray out and cause burns.
• ⚠️ Let the engine cool completely before starting. A safe wait time is 2-3 hours after driving.
• ⚠️ Keep coolant away from pets and children. It is poisonous and often smells sweet.
• ⚠️ Wear safety glasses and nitrile gloves when draining coolant.
• ⚠️ Dispose of old coolant properly. Do not pour it on the ground or into drains.
• ⚠️ Battery disconnect is not required for this repair.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Drain pan 2-gallon minimum
• Phillips screwdriver #2
• Flathead screwdriver 6mm
• Slip-joint pliers 10-inch
• Hose clamp pliers (specialty)
• Pick tool 90-degree
• Funnel long-neck
• Coolant spill-free funnel kit (specialty)
• Shop towels
• Flashlight

---

🔩 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
• Asian vehicle coolant, ethylene glycol phosphate-based, premixed 50/50 - Qty: 1-2 gallons
• Distilled water - Qty: 1 gallon if using concentrate coolant

---

📋 Before You Begin

• 🅿️ Park your Tucson on level ground and set the parking brake.
• ❄️ Make sure the engine is fully cold before touching the cooling system.
• 🧴 Identify which hose you are replacing: the upper hose is easier to see at the top of the radiator; the lower hose is near the bottom of the radiator.
• 🧰 A hose clamp is the metal band that squeezes the hose tight so coolant cannot leak.
• 🧰 A spill-free funnel is a funnel that locks onto the radiator neck and helps remove air pockets while refilling coolant.
• 📌 If replacing only one hose, inspect the other hose. If it feels swollen, cracked, mushy, or oil-soaked, replace it too.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Let the Engine Cool

• Use your gloved hand carefully near the radiator area to confirm there is no heat coming off the system.
• Do not remove the radiator cap until the upper radiator hose feels cool and soft.
• Cold engine only.

Step 2: Remove the Radiator Cap

• Use nitrile gloves and safety glasses.
• Place a shop towel over the radiator cap.
• Turn the cap slowly counterclockwise by hand to the first stop, pause, then remove it fully.

Step 3: Position the Drain Pan

• Use a drain pan 2-gallon minimum and place it under the radiator drain area.
• Use a flashlight to locate the radiator drain plug at the lower radiator area.
• If access is tight, you may also drain coolant by removing the lower radiator hose, but be ready for a faster coolant flow.

Step 4: Drain Enough Coolant

• Use a Phillips screwdriver #2 or your fingers, depending on drain plug style, to open the radiator drain plug slowly.
• Drain coolant until the level is below the hose you are replacing.
• Close the drain plug by hand, then snug it gently with the Phillips screwdriver #2 if needed.
• Do not overtighten the plastic drain plug.

Step 5: Loosen the Hose Clamps

• Use hose clamp pliers for spring-style clamps. Spring-style clamps are clamps you squeeze to open, then slide away from the hose end.
• Use a flathead screwdriver 6mm for worm-gear clamps. Worm-gear clamps have a screw head that loosens the band.
• Slide each clamp several inches away from the hose end.
• If the clamp is rusty, weak, or bent, replace it with a new radiator hose clamp.

Step 6: Break the Old Hose Loose

• Use slip-joint pliers 10-inch to gently twist the hose at the radiator neck and engine connection.
• If the hose 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. The radiator fitting can crack if forced.
• Twist first, pull second.

Step 7: Remove the Old Hose

• Use both hands to pull the old hose off once it twists freely.
• Keep the drain pan underneath because more coolant may spill.
• Use shop towels to wipe spilled coolant from the fan shroud, frame, and hose area.

Step 8: Clean the Hose Connections

• Use shop towels to clean the radiator neck and engine-side hose fitting.
• Use a flashlight to inspect both fittings for cracks, corrosion, or old rubber stuck to the surface.
• Do not use sandpaper on plastic radiator fittings.

Step 9: Install the New Hose

• Use your hands to slide the new hose onto the radiator neck and engine fitting.
• Make sure the hose goes fully past the raised bead on each fitting. The bead is the small raised ring that helps hold the hose in place.
• Check that the hose is not twisted, kinked, or rubbing against the fan, belt, or sharp edges.

Step 10: Position and Tighten the Clamps

• Use hose clamp pliers to position spring clamps behind the raised bead on each fitting.
• Use a flathead screwdriver 6mm to tighten worm-gear clamps evenly if your replacement clamps use screws.
• Do not place the clamp on the very edge of the hose.
• If using worm-gear clamps, tighten snug only; do not crush the hose or plastic radiator neck.

Step 11: Refill the Cooling System

• Use a long-neck funnel or coolant spill-free funnel kit at the radiator fill neck.
• Pour Asian vehicle 50/50 premixed coolant slowly into the radiator until full.
• Fill the coolant reservoir to the FULL mark using the same coolant.
• If using concentrate coolant, mix it with distilled water to a 50/50 ratio before adding it.

Step 12: Bleed Air from the Cooling System

• Use the coolant spill-free funnel kit and leave the funnel partly filled with coolant.
• Start the engine and let it idle with the cabin heater set to hot and blower on low.
• Watch the coolant level in the funnel. Add coolant as the level drops.
• Let the engine idle until the upper radiator hose becomes warm and the radiator fan cycles on.
• Use safety glasses and keep hands away from the cooling fan. The fan can start automatically.

Step 13: Install the Radiator Cap

• Use nitrile gloves and remove the spill-free funnel according to the funnel kit instructions.
• Install the radiator cap by hand and turn it clockwise until fully seated.
• Check the reservoir level and top off to the FULL mark if needed.

Step 14: Check for Leaks

• Use a flashlight to inspect both hose ends while the engine idles.
• Look for drips, wetness, steam, or coolant smell around the hose clamps.
• If you see a leak, shut the engine off, let it cool, then reposition or tighten the clamp using hose clamp pliers or a flathead screwdriver 6mm.

---

✅ After Repair

• ✅ Take a short test drive while watching the temperature gauge. It should stay in the normal range.
• ✅ After the drive, park your Tucson and let it cool completely.
• ✅ Recheck the coolant reservoir level when cold and top off to the FULL mark if needed.
• ✅ Inspect the hose ends again for dried coolant residue or wet spots.
• ✅ If the temperature rises, the heater blows cold, or you hear gurgling, air may still be trapped in the system and bleeding should be repeated.

---

💰 DIY vs Shop Cost

Shop Cost: $140-$280 USD equivalent (parts + labor)

DIY Cost: $25-$80 USD equivalent (parts only)

You Save: $115-$200 USD equivalent by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.2 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.