🔧 Tundra - Radiator Hose Replacement

Replacing a radiator hose stops coolant leaks and prevents overheating. On your Tundra, there are two main hoses: the upper (radiator to engine) and the lower (radiator to water inlet).

Quick question (pick one): Are you replacing the upper hose, the lower hose, or both?

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

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⚠️ Safety & Precautions

• ⚠️ Never open the radiator cap on a hot engine; hot coolant can spray and burn.
• ⚠️ Support the truck with jack stands if you lift it; never rely on a jack.
• ⚠️ Keep coolant off belts and pulleys; wipe spills immediately.
• ⚠️ Coolant is toxic—use a drain pan and keep away from kids/pets.
• ⚠️ 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
• Drain pan (at least 10 liters)
• Funnel
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• 10mm socket
• 3/8" ratchet
• 6" extension
• Hose clamp pliers
• Channel-lock pliers
• Pick tool (specialty)
• Razor scraper (plastic)
• Shop rags
• Torque wrench (10–80 ft-lbs 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
• Toyota Super Long Life Coolant (pink) premixed - 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 fully (ideally sit overnight).
• If you need more access, raise the front with a floor jack and support with jack stands on the frame.
• Place a drain pan under the radiator drain area before opening anything.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the lower engine cover (if equipped)

• Use a 10mm socket with a 3/8" ratchet and extension to remove the bolts holding the front skid/under cover.
• Set the hardware aside in a tray so nothing gets lost.

Step 2: Drain enough coolant to get below the hose level

• Remove the radiator cap only when cold; use shop rags and turn slowly.
• Position the drain pan under the radiator drain (petcock).
• Open the drain slowly and drain 1–2 gallons (usually enough for the upper hose; more may be needed for the lower hose).
• Tip: Drain only what you need.

Step 3: Identify the hose you’re replacing

• Upper hose: runs from the top of the radiator to the engine housing.
• Lower hose: runs from the bottom of the radiator down to the engine water inlet area.

Step 4: Release the hose clamps

• If you have spring clamps, squeeze them using hose clamp pliers and slide them back on the hose.
• If you have screw-type clamps, loosen them using channel-lock pliers carefully (or a suitable driver if your clamp uses a hex/slot head).
• Tip: Take a photo before moving clamps.

Step 5: Remove the old hose

• Twist the hose by hand to break it free from the fitting.
• If it’s stuck, use a pick tool (specialty) to gently lift the hose edge off the metal neck, then twist again. A pick tool is a small hooked tool used to separate stuck rubber without prying hard.
• Pull the hose off and aim it into the drain pan for any remaining coolant.

Step 6: Clean and inspect the fittings

• Wipe the radiator neck and engine-side fitting with shop rags.
• If there’s stuck rubber, use a plastic razor scraper to remove it without scratching.
• Inspect the radiator neck for cracks and the engine fitting for corrosion.

Step 7: Install the new hose

• Slide the clamps onto the new hose first.
• Push the hose fully onto the fittings until it bottoms out.
• Position the clamps in the same spot as original (behind the raised bead on the neck), then release/tighten the clamps using hose clamp pliers (spring type) or channel-lock pliers (screw type).

Step 8: Reinstall the lower engine cover

• Reinstall the skid/under cover using the 10mm socket, ratchet, and extension.
• Torque to 10 Nm (7 ft-lbs) for 10mm under-cover bolts.

Step 9: Refill coolant

• Close the radiator drain.
• Use a funnel to refill with Toyota Super Long Life Coolant (pink) premixed at the radiator.
• Fill the coolant reservoir to the “FULL” line.

Step 10: Bleed air and check for leaks

• Start the engine and set the heater to max hot.
• Let it idle and watch the temperature gauge.
• As it warms up, carefully squeeze the upper hose using nitrile gloves to help move air. Stop if it feels too hot.
• When the thermostat opens, the coolant level may drop—top off as needed using the funnel.
• Check both hose ends for seepage.

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✅ After Repair

• Recheck coolant level after the first full heat cycle and again the next morning (engine cold). Top off radiator and reservoir if needed.
• Inspect for leaks with the engine running and again after a short test drive.
• Make sure the heater blows hot and the temperature gauge stays normal.

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💰 DIY vs Shop Cost

Shop Cost: ₹4,000-₹10,000 (parts + labor)

DIY Cost: ₹1,500-₹6,000 (parts only)

You Save: ₹2,500-₹4,000 by doing it yourself!

Shop labor rates in Panipat vary, often ₹800-₹2,000/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.