🔧 RAV4 - Radiator Hose Replacement

Replacing a radiator hose stops coolant leaks and prevents overheating. On your RAV4 there are two main radiator hoses: the upper hose (top of radiator to engine) and the lower hose (bottom of radiator to engine). The steps below cover both—pick the hose you’re replacing.

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

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⚠️ Safety & Precautions

• 🛑 Never open the radiator cap hot; wait until fully cool.
• 🧤 Coolant is toxic—wear gloves and keep it off the ground.
• 🔥 Keep hands clear of the radiator fans; they can turn on unexpectedly.
• 🧱 Support the vehicle with jack stands if you go underneath.
• 🔌 Battery disconnect is not required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• Drain pan (at least 2-gallon)
• Funnel
• Slip-joint pliers
• Hose clamp pliers
• Pick tool
• Razor blade or hose cutter
• 10mm socket
• 10mm ratchet
• 10mm wrench
• Trim clip removal tool
• Flashlight
• Shop rags

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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
• Hose clamps - Qty: 2
• Toyota-compatible coolant (pink, pre-mixed) - Qty: 1-2 gallons

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📋 Before You Begin

• 🅿️ Park on level ground, set the parking brake, and let the engine cool completely.
• 🧊 Put a drain pan under the front of the radiator before loosening anything.
• 🧽 Wipe dirt off hose ends and fittings so debris doesn’t fall into the cooling system.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve pressure safely

• Use a shop rag and slowly loosen the radiator cap only when the engine is fully cool.
• If it hisses or pushes coolant, tighten it back and wait longer.

Step 2: Drain enough coolant

• Place the drain pan (at least 2-gallon) under the radiator drain.
• Use slip-joint pliers if needed to turn the drain cock (petcock) carefully. (A petcock is the small plastic drain valve on the radiator.)
• Drain until the coolant level is below the hose you’re replacing, then close the drain.

Step 3: Gain access

• For the upper hose: use a 10mm socket with 10mm ratchet to remove the engine cover fasteners (if equipped) and lift it off.
• For the lower hose: raise the front with a floor jack, support with jack stands, then use a trim clip removal tool and 10mm socket to remove the lower splash shield fasteners (if it blocks access).

Step 4: Remove the hose clamps

• Use hose clamp pliers (they lock onto spring clamps) to squeeze the clamp and slide it back on the hose.
• If you have screw-type clamps, use a 10mm socket or 10mm wrench to loosen them.
• Tip: Take a quick photo of clamp positions.

Step 5: Break the hose loose

• Twist the hose by hand to break it free from the fitting.
• If it’s stuck, carefully work around the end with a pick tool to loosen it. (A pick tool is a small hook used to separate stuck rubber.)
• If the hose won’t come off, use a razor blade or hose cutter to slit the hose lengthwise at the very end, then peel it off—don’t cut into the metal neck.

Step 6: Install the new hose

• Compare the new hose to the old one for matching shape and length.
• Slide the clamps onto the new hose first.
• Push the hose fully onto each fitting until it bottoms out.
• Position clamps behind the raised bead on the fitting, then release/tighten the clamp using hose clamp pliers or a 10mm socket.

Step 7: Reinstall covers and shields

• Use a 10mm socket and 10mm ratchet to reinstall any splash shield and engine cover fasteners.
• Lower the vehicle safely using the floor jack after removing the jack stands.

Step 8: Refill coolant and bleed air

• Use a funnel to refill the radiator with Toyota-compatible coolant (pink, pre-mixed) to the top.
• Fill the coolant reservoir to the “FULL” line.
• Start the engine and set the heater to hot with the fan on low.
• Let it warm up and occasionally squeeze the upper hose (wear gloves) to help burp air out.
• Top off the radiator as the level drops, then reinstall the radiator cap once the level stabilizes.

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✅ After Repair

• 🧪 With the engine running, inspect both ends of the replaced hose for leaks using a flashlight.
• 🌡️ Test drive 10–15 minutes, then recheck coolant level in the reservoir after it cools 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-$500 (parts + labor)

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

You Save: $130-$460 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?

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