🔧 Sequoia - Radiator Hose Replacement

Replacing a radiator hose means safely draining some coolant, removing the old hose and clamps, and installing a new hose without leaks. A worn hose can swell, crack, or burst and quickly cause overheating.

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 you.
• ⚠️ Support the truck with jack stands if you go underneath; never rely on a jack alone.
• ⚠️ Keep coolant away from kids and pets; it’s toxic and attractive-tasting.
• Disconnecting the battery 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-quart)
• Funnel
• Pliers
• Hose clamp pliers (specialty)
• Pick tool (specialty)
• Flat-blade screwdriver
• 10mm socket
• 3/8" drive ratchet
• 3/8" drive extension set
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Shop towels

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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 your Sequoia on level ground and let the engine cool completely (best: overnight).
• Set the parking brake and place wheel chocks behind the rear wheels.
• Set the HVAC to HOT and the fan to LOW later during bleeding (this helps circulate coolant through the heater core).
• If you’re doing the lower hose, plan to raise the front and support it with jack stands.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm which hose you’re replacing

• The upper radiator hose runs from the top of the radiator to the engine.
• The lower radiator hose runs from the bottom of the radiator to the engine area and is harder to reach.
• It’s common to replace both at once.

Step 2: Remove the engine cover (if equipped)

• Use a 10mm socket and ratchet to remove the engine cover fasteners, then lift the cover off.

Step 3: Relieve pressure and set up for draining

• Place a drain pan under the radiator.
• Slowly loosen the radiator cap by hand only after the engine is fully cool.
• If it hisses or pushes back, stop and wait longer.

Step 4: Drain enough coolant to get below the hose level

• From the lower area of the radiator, open the drain cock using a flat-blade screwdriver (some are hand-turn; use the tool only if needed).
• Drain coolant until the level is below the hose you’re removing, then close the drain cock snugly by hand.
• Use shop towels to wipe any spills.

Step 5: Remove the old hose clamp(s)

• Use hose clamp pliers (specialty) to compress spring clamps and slide them back on the hose.
• If your hose uses screw clamps, loosen them with a flat-blade screwdriver.
• A clamp is the metal ring that squeezes the hose.

Step 6: Remove the old radiator hose

• Twist the hose by hand to break it loose, then pull it off.
• If it’s stuck, carefully work around the edge with a pick tool (specialty) to free it.
• Do not pry hard on the radiator neck; it can crack and cause a bigger repair.

Step 7: Clean and inspect the hose connections

• Use shop towels to clean the radiator neck and engine-side neck.
• Check for corrosion, cracks, or deep pitting on the necks. If you see damage, stop—installing a new hose may not seal.

Step 8: Install the new radiator hose

• Slide the clamp(s) onto the new hose first.
• Push the hose fully onto each connection until it seats against the stop/bead.
• Position the clamp behind the raised bead on the neck, then release with hose clamp pliers (specialty).
• If using screw clamps, tighten with a flat-blade screwdriver until snug—do not crush the hose.

Step 9: Refill coolant

• Use a funnel to fill the radiator with Toyota Super Long Life Coolant (pink) premixed.
• Fill the coolant reservoir to the FULL line.

Step 10: Bleed air and check operation

• Start the engine and let it idle with the radiator cap off.
• Turn the heater to HOT and fan to LOW.
• Watch the coolant level; as the thermostat opens, the level may drop—add coolant as needed using the funnel.
• When you see steady flow and fewer bubbles, install the radiator cap by hand.

Step 11: Warm up and final top-off

• Let the engine reach normal operating temperature and confirm the heater blows hot.
• Shut the engine off, let it cool, then recheck the reservoir level and top off if needed.
• Inspect the new hose ends for seepage.

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✅ After Repair

• Test drive 10–15 minutes while watching the temperature gauge.
• Park, let it cool, then recheck for leaks and recheck reservoir level.
• If you smell coolant or see wetness at a clamp, reposition and re-secure the clamp.
• Dispose of old coolant properly (sealed container; take to a recycling/collection center).

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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.