🔧 Tundra - Radiator Hose Replacement

Replacing your radiator hose(s) stops coolant leaks and prevents overheating. On your Tundra, you’ll typically replace the upper radiator hose (top of radiator to engine) and/or the lower radiator hose (bottom of radiator to engine).

Assumption: This covers replacing both upper and lower hoses using common factory-style spring clamps.

Difficulty Level: Beginner | 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 you.
• ⚠️ Support the truck with jack stands if you lift it; never rely on a floor jack alone.
• ⚠️ Keep coolant off belts and pulleys; wipe spills immediately.
• ⚠️ Coolant is toxic to people and pets; capture it in a drain pan and dispose properly.

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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 3-gallon)
• Funnel
• Spill-free coolant funnel kit (specialty)
• Pliers
• Hose clamp pliers (specialty)
• Pick tool (specialty)
• Flathead screwdriver
• 10mm socket
• Ratchet
• Torque wrench (10–80 ft-lbs)
• Shop rags
• Flashlight

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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: 4
• Toyota Super Long Life Coolant (pink, premixed 50/50) - Qty: 3-4 gallons

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Let the engine cool completely (upper radiator hose should feel cool).
• Place wheel chocks behind the rear tires.
• If you need more room for the lower hose, 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: Remove any front skid plate (if equipped)

• Use a 10mm socket and ratchet to remove the skid plate bolts.
• Support the plate with one hand as the last bolts come out.
• On reassembly, use a torque wrench: Torque to 40 Nm (30 ft-lbs).

Step 2: Drain coolant to a safe level

• Place a drain pan (at least 3-gallon) under the radiator drain area.
• Remove the radiator cap slowly (engine fully cold) to release any leftover pressure.
• Open the radiator drain cock as needed (turn by hand; use a flathead screwdriver only if required).
• Drain until the coolant level is below the hose(s) you’re replacing, then close the drain cock snugly. Snug, not gorilla-tight.

Step 3: Remove the upper radiator hose

• Locate the upper hose running from the top of the radiator to the engine.
• Move the clamps away from the hose ends:
  • For spring clamps, squeeze with hose clamp pliers (specialty) or pliers and slide the clamp back.
  • For worm-gear clamps, loosen with a flathead screwdriver.
• Twist the hose to break it free, then pull it off.
• If it’s stuck, use a pick tool (specialty) to gently lift the hose edge to let air in. (A pick tool is a small hooked tool used to separate stuck rubber without tearing it.)
• Wipe the radiator and engine hose nipples with shop rags.

Step 4: Remove the lower radiator hose

• Locate the lower hose running from the bottom of the radiator to the engine.
• Reposition the drain pan under the lower hose—more coolant will spill here.
• Use hose clamp pliers (specialty) or pliers to compress the spring clamps and slide them back.
• Twist and pull the hose off. Use the pick tool (specialty) carefully if needed.
• Clean both sealing surfaces with shop rags.

Step 5: Install the new hoses and clamps

• Match the new hoses to the old ones for shape and length before installing.
• Slide new clamps onto each hose end before pushing the hose on.
• Push each hose fully onto its fitting until it seats against the stop/bead.
• Position spring clamps behind the raised bead on the fitting using hose clamp pliers (specialty) or pliers.
• If using worm-gear clamps, tighten with a flathead screwdriver until snug. Overtightening can cut the hose.

Step 6: Refill coolant

• Make sure the radiator drain cock is closed.
• Install a spill-free coolant funnel kit (specialty) on the radiator fill neck (this helps burp air out).
• Pour in Toyota Super Long Life Coolant (pink, premixed 50/50) using the funnel.
• Fill the overflow reservoir to the FULL line using a funnel.

Step 7: Bleed air and check for leaks

• Start the engine and set the HVAC to HOT with the fan on low.
• Let the engine idle while you watch the coolant level in the spill-free funnel; add coolant as the level drops.
• As the thermostat opens, you should feel the upper hose get hot and see coolant flow.
• Inspect both hose ends for leaks using a flashlight.
• When bubbles stop and the level stabilizes, shut the engine off and let it cool fully, then top off as needed.

Step 8: Reinstall skid plate (if removed)

• Reinstall the skid plate bolts using a 10mm socket and ratchet.
• Use a torque wrench: Torque to 40 Nm (30 ft-lbs).

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✅ After Repair

• Test drive 10–15 minutes while watching the temperature gauge.
• Park, let the engine cool completely, then recheck the radiator level and overflow reservoir level; top off if needed.
• Recheck for leaks around both hoses the next morning (cold engine).
• Make sure no coolant dripped onto the drive belts; clean with shop rags if needed.

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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?

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