🔧 Enclave - Radiator Hose Replacement

On your Enclave, replacing a radiator hose means safely draining some coolant, removing the old hose and clamps, and installing the new hose without leaks. Because the cooling system runs hot and under pressure, the key is working on a fully cooled engine and refilling/bleeding the system correctly.

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

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⚠️ Safety & Precautions

• ⚠️ Only work when the engine is completely cold; hot coolant can cause severe burns.
• ⚠️ Never open the surge tank cap when hot or pressurized.
• ⚠️ Support the SUV with jack stands if lifting; never rely on a jack alone.
• ⚠️ Coolant is toxic—catch it in a drain pan and keep away from kids/pets.
• ⚠️ Wipe up spills immediately; coolant is slippery.

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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)
• Trim clip remover
• Flathead screwdriver
• 7mm nut driver
• 8mm nut driver
• 10mm socket
• 3/8" drive ratchet
• 3" extension for 3/8" drive ratchet
• Hose clamp pliers (specialty)
• Pick tool
• Funnel
• Shop rags
• Torque wrench (10–80 Nm range)

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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: 2-4
• DEX-COOL coolant (50/50 premix) - Qty: 2-3 gallons

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Let the engine cool for at least 2–3 hours (overnight is best).
• Place a drain pan under the front of the vehicle before loosening any hoses.
• Hose clamp pliers are pliers that squeeze spring clamps and hold them open.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover (if equipped)

• Pull up firmly by hand at the corners to release the rubber grommets.
• Set the cover aside.

Step 2: Relieve any residual pressure safely

• Place a shop rag over the surge tank cap.
• Slowly turn the cap counterclockwise by hand to the first stop to vent, then remove it fully.
• If it hisses hard, stop and wait longer.

Step 3: Raise the front (needed for lower hose access)

• Use a floor jack (rated 3-ton minimum) to lift at the front jacking point.
• Set the vehicle onto jack stands (rated 3-ton minimum).
• Shake the vehicle slightly to confirm it’s stable.

Step 4: Remove the lower splash shield (for best access)

• Use a trim clip remover for plastic push pins.
• Use a 7mm nut driver or 8mm nut driver for small screws (varies by fastener).
• Set the shield and hardware aside in a small pile.

Step 5: Drain enough coolant to get below hose level

• Position the drain pan (at least 2-gallon) under the radiator area.
• If accessible, open the radiator drain using a flathead screwdriver (some radiators use a hand-turn drain).
• If the drain isn’t accessible, you can drain by loosening the lower hose clamp in Step 7 and letting coolant flow into the pan.

Step 6: Replace the upper radiator hose (top hose)

• Locate the upper hose running from the radiator (top connection) to the engine coolant outlet.
• Release spring clamps using hose clamp pliers (specialty), then slide the clamp back on the hose 2–3 inches.
• If you have worm-gear clamps, loosen them using a 7mm nut driver or 8mm nut driver.
• Twist the hose to break it free, then pull it off. If stuck, carefully work around the edge with a pick tool (don’t gouge the plastic/radiator neck).
• Install the new hose fully seated on both ends.
• Reposition the clamps to the same “clamp mark” location near the hose ends.

Step 7: Replace the lower radiator hose (bottom hose)

• Locate the lower hose at the bottom of the radiator and where it connects to the engine side.
• Keep the drain pan (at least 2-gallon) directly underneath; more coolant will come out.
• Release the clamps using hose clamp pliers (specialty) and slide them back.
• Remove the hose by twisting and pulling. Use a pick tool carefully only if needed.
• Install the new lower hose fully seated, then reinstall clamps in the correct position.
• Make sure the hose isn’t rubbing anything.

Step 8: Reinstall the splash shield

• Reposition the shield.
• Reinstall fasteners using the trim clip remover (to align clips) and a 7mm nut driver/8mm nut driver as needed.

Step 9: Lower the vehicle

• Use the floor jack (rated 3-ton minimum) to lift slightly, remove jack stands (rated 3-ton minimum), then lower fully.

Step 10: Refill coolant and bleed air

• Insert a funnel into the surge tank and fill with DEX-COOL coolant (50/50 premix) to the “COLD” mark.
• Reinstall the surge tank cap hand-tight.
• Start the engine and set HVAC to heat: use the cabin controls to set high temp and medium fan.
• Let it idle 5–10 minutes while watching for leaks at both hose ends.
• Shut the engine off, let it cool 15–20 minutes, then carefully remove the cap and top off to the “COLD” mark.
• Repeat the warm-up/cool-down/top-off once more if the level drops.

Step 11: Reinstall the engine cover

• Align the cover with the mounting points and press down by hand until it snaps into the grommets.

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✅ After Repair

• Inspect for seepage around each clamp with a flashlight after the first drive.
• Check the surge tank level the next morning (cold) and adjust to the “COLD” mark.
• Watch the temperature gauge on the first few trips; shut down if it overheats.
• Dispose of old coolant properly (never pour it on the ground).

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💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $40-$120 (parts only)

You Save: $210-$330 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.