🔧 Passport - Radiator Hose Replacement

Replacing a radiator hose means removing the old hose and clamps, installing the new hose correctly seated on both fittings, then refilling and bleeding the cooling system so it doesn’t overheat.

Before I tailor the exact steps: are you replacing the upper radiator hose (top of radiator to engine) or the lower radiator hose (bottom of radiator to engine)?

Difficulty Level: Intermediate | Estimated Time: 1.0-2.5 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 Passport with jack stands if you go underneath; never rely on a jack.
• ⚠️ Coolant is toxic—keep it away from kids and pets, and clean spills immediately.
• ⚠️ Keep fingers clear of the cooling fans; they can turn on unexpectedly.
• ⚠️ Battery disconnect is not required for a hose swap, but keep tools away from the battery positive terminal.

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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 (2+ gallon)
• Long-reach hose clamp pliers
• Slip-joint pliers
• Pick tool set
• Flat-blade screwdriver
• 10mm socket
• 3/8" drive ratchet
• 3/8" drive extension (6")
• Trim clip remover
• Funnel with spill stopper (coolant funnel)
• 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
• Honda-type premixed coolant (50/50) - Qty: 1-2 gallons

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📋 Before You Begin

• Park the Passport on level ground, set the parking brake, and let the engine cool completely.
• Put wheel chocks behind the rear tires.
• Place a drain pan under the front of the vehicle.
• If you’ll access the lower hose from underneath, lift the front with a floor jack and set it on jack stands.
• Identify your clamp type: spring clamp (squeezes with pliers) or worm-gear clamp (tightens with a screwdriver).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Depressurize the cooling system

• Confirm the engine is cool, then slowly loosen the cap on the coolant reservoir using your hand and a shop towel.
• If you have a radiator cap (some setups do), loosen it slowly with a shop towel as well.

Step 2: Drain coolant to below the hose level

• Position the drain pan (2+ gallon) under the radiator.
• Open the radiator drain (if accessible) by turning it by hand or with a flat-blade screwdriver as needed.
• Drain only enough coolant so the level is below the hose you’re replacing, then close the drain.
• Save clean coolant only if uncontaminated.

Step 3: Gain access to the hose

• Upper hose access: From above, locate the hose running from the top of the radiator to the engine.
• Lower hose access: From below, remove the needed lower cover/undertray fasteners using a 10mm socket, 3/8" ratchet, and trim clip remover.

Step 4: Release the clamps

• If it’s a spring clamp, squeeze it with long-reach hose clamp pliers and slide it back on the hose.
• If it’s a worm-gear clamp, loosen it with a flat-blade screwdriver and slide it back.
• Do this on both ends of the hose.
• Take a photo of clamp positions first.

Step 5: Remove the old hose (without breaking the fittings)

• Twist the hose to break it free using slip-joint pliers (gentle pressure).
• If it’s stuck, carefully work around the hose end with a pick tool to break the seal.
• Pull the hose off and aim it into the drain pan to catch any remaining coolant.
• Don’t pry hard on plastic necks.

Step 6: Prep the connections

• Wipe the radiator/engine hose fittings clean using shop towels.
• Inspect the fittings for cracks, heavy corrosion, or a damaged “bead” (the raised ring that helps keep the hose on).

Step 7: Install the new hose

• Slide the new clamps onto the new hose first (use long-reach hose clamp pliers if spring clamps).
• Push the hose fully onto each fitting until it seats against the stop.
• Position clamps behind the bead on each fitting, then secure them.
• If using worm-gear clamps, tighten with a flat-blade screwdriver until snug—do not crush the hose.

Step 8: Reinstall any covers removed

• Reinstall the undertray/cover using a 10mm socket, 3/8" ratchet, and any clips with the trim clip remover.

Step 9: Refill coolant

• Refill with Honda-type premixed coolant (50/50) using a funnel with spill stopper (coolant funnel).
• Fill the reservoir to the MAX line when finished.

Step 10: Bleed air and verify operation

• Start the engine and set the HVAC to HOT with the fan on low.
• Let it idle and watch the coolant level; add coolant as the level drops using the coolant funnel.
• Once the radiator fans cycle on and off, shut the engine off and let it cool fully, then recheck the reservoir level.
• Check for leaks at both hose ends using a flashlight and shop towels.

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✅ After Repair

• Test drive 10–15 minutes, then recheck for leaks after parking.
• After the next full cool-down, recheck the coolant reservoir and top off if needed.
• Verify the temperature gauge stays normal and the heater blows hot.
• Dispose of old coolant properly (parts stores often accept waste fluids).

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💰 DIY vs Shop Cost

Shop Cost: $250-$550 (parts + labor)

DIY Cost: $40-$160 (parts only)

You Save: $210-$390 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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