🔧 Impala - Radiator Hose Replacement

Replacing a radiator hose fixes coolant leaks and helps prevent overheating. You’ll remove the old hose, install the correct new hose with secure clamps, then refill and bleed the cooling system so it doesn’t trap air.

Difficulty Level: Intermediate | Estimated Time: 1.0-2.0 hours

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⚠️ Safety & Precautions

• 🛑 Never open the coolant cap on a hot engine; wait until fully cool.
• 🧤 Coolant is toxic—wear gloves and keep it off paint and away from pets.
• 🔥 Keep hands clear of the radiator fans; they can turn on unexpectedly.
• 🔋 Battery disconnect is not required, but keep tools away from the battery terminals.
• 🧯 Clean spills immediately; coolant on belts can cause slipping.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Drain pan (at least 2-gallon)
• Slip-joint pliers
• Hose clamp pliers (specialty)
• Flathead screwdriver
• 8mm socket
• 10mm socket
• 1/4" ratchet
• 3" extension
• Pick tool (specialty)
• Trim clip removal tool
• Funnel
• Shop towels
• Torque wrench (inch-pound or small ft-lb)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Radiator hose (upper) - Qty: 1
• Radiator hose (lower) - Qty: 1
• Hose clamps - Qty: 2
• Dex-Cool coolant (pre-mixed 50/50) - Qty: 2-3 gallons

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📋 Before You Begin

• 🧊 Park on level ground and let the engine cool completely (cold to the touch).
• 🛞 Set the parking brake and place wheel chocks behind the rear wheels.
• 🪣 Place a drain pan under the radiator area.
• If you’re doing the lower hose, plan to raise the front with a floor jack and support with jack stands.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm which hose you’re replacing

• Upper radiator hose runs from the top of the radiator to the engine.
• Lower radiator hose runs from the bottom of the radiator to the engine/water pump area.
• Upper is usually easier to access.

Step 2: Remove covers/ducting if they block access

• Remove any plastic engine cover by pulling upward carefully (use gloves for grip).
• If an air duct is in the way, loosen clamps using a flathead screwdriver or 8mm socket, then move the duct aside.
• If you find plastic push-clips, pop them out using a trim clip removal tool.

Step 3: Relieve cooling system pressure (engine cold)

• Place a shop towel over the coolant reservoir cap.
• Slowly loosen the cap by hand to release any leftover pressure, then remove it.

Step 4: Drain coolant to below the hose level

• Position the drain pan under the radiator lower area.
• If you can access the radiator drain, open it carefully by hand or with a flathead screwdriver (depending on style), and drain enough coolant so it’s below the hose you’re removing.
• If no drain access, you can drain by loosening the lower hose clamp (next steps) and controlling the flow into the pan.

Step 5: Raise the front (recommended for lower hose)

• Lift the front using a floor jack (rated 3-ton minimum) at the proper front lift point.
• Support with jack stands (rated 3-ton minimum).
• Never work under a car supported only by a jack.

Step 6: Remove the hose clamps

• If it has spring clamps, squeeze them using hose clamp pliers (specialty) and slide the clamp back on the hose.
• If it has worm-gear clamps, loosen using a flathead screwdriver or 8mm socket and slide the clamp back.
• Take a photo before removal.

Step 7: Break the hose free and remove it

• Twist the hose near the fitting using gloved hands to break it loose.
• If it’s stuck, gently work the edge with a pick tool (specialty) to let air in, then twist again.
• Pull the hose off and aim it into the drain pan as coolant drains.
• Do not pry hard on the radiator neck. It can crack.

Step 8: Prep the fittings and compare parts

• Wipe the radiator/engine hose connections with shop towels.
• Compare the new hose to the old hose (same bends, same ends).
• Slide the new hose clamps onto the new hose before installing it.

Step 9: Install the new radiator hose

• Push the hose fully onto each fitting by hand until it bottoms out.
• Position clamps behind the bead (raised ridge) on the fitting.
• For spring clamps: release using hose clamp pliers (specialty) to lock into place.
• For worm-gear clamps: tighten using a 8mm socket or flathead screwdriver until snug.
• Torque to 3-5 Nm (27-44 in-lbs) for worm-gear clamps if using a torque wrench.
• Don’t over-tighten; you can cut the hose.

Step 10: Reinstall anything you removed

• Reinstall ducts and tighten using a 8mm socket or flathead screwdriver.
• Reinstall clips using a trim clip removal tool (reverse to push them back in).

Step 11: Refill coolant

• Place a funnel in the coolant reservoir.
• Fill with Dex-Cool coolant (pre-mixed 50/50) to the “COLD” mark.
• Reinstall the reservoir cap hand-tight.

Step 12: Bleed air and verify no leaks

• Start the engine and set the HVAC to heat, high fan (use the car’s climate controls).
• Let the engine idle and watch the temperature gauge.
• Look for leaks at both ends of the new hose using safety glasses.
• After the thermostat opens (upper hose gets hot), shut off the engine and let it cool fully.
• Recheck coolant level and top off to the “COLD” mark using the funnel.

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✅ After Repair

• 🧪 Road test 10-15 minutes, then recheck for seepage around clamps.
• 🌡️ Confirm the cabin heat works and the temperature gauge stays normal.
• 🧊 Next morning (cold engine), recheck coolant level and top off if needed.
• 🧼 Clean any spilled coolant and dispose of old coolant properly.

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💰 DIY vs Shop Cost

Shop Cost: $250-$550 (parts + labor)

DIY Cost: $60-$180 (parts only)

You Save: $190-$370 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-2.0 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.