🔧 Accord - Radiator Hose Replacement

On your Accord, the radiator hoses carry coolant between the radiator and the engine. A cracked, swollen, or leaking hose can cause overheating, so replacement is important to prevent engine damage.

Quick question: Are you replacing the upper hose (top of radiator) or the lower hose (bottom of radiator)? If you’re not sure, I’ll show how to identify both in the steps.

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

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⚠️ Safety & Precautions

• ⚠️ Never open the radiator cap hot—coolant can spray and burn you.
• ⚠️ Support the front with jack stands if you go underneath (never rely on a jack alone).
• ⚠️ Coolant is toxic—use a drain pan and clean spills immediately.
• ⚠️ Keep hands clear of the cooling fan; it can turn on unexpectedly.
• 🔋 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 2-gallon)
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Slip-joint pliers
• Hose clamp pliers (specialty)
• Pick tool (small)
• Razor blade scraper
• Flat-blade screwdriver (medium)
• Phillips screwdriver #2
• 10mm socket
• 3/8" ratchet
• 3" extension for 3/8" ratchet
• 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
• Hose clamps - Qty: 2
• Honda-compatible coolant (Type 2 premix) - Qty: 1-2 gallons

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Let the engine cool completely (best: sit overnight).
• Set the cabin heater later to HOT during bleeding (this opens the heater circuit).
• Take a photo of hose routing first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Identify which hose you’re replacing

• Open the hood and locate the radiator at the front of the engine bay.
• The upper radiator hose connects near the top of the radiator to the engine.
• The lower radiator hose connects near the bottom of the radiator and is usually easier to reach from underneath.

Step 2: Remove pressure safely

• Use your hand to verify the upper hose is cool and not pressurized.
• Place shop towels over the radiator cap and slowly loosen it by hand to the first stop, then remove it once any hiss is gone.

Step 3: Drain enough coolant to get below the hose level

• Place a drain pan under the radiator.
• If you need underside access, raise the front with a floor jack and support with jack stands.
• Open the radiator drain (petcock) by hand or with a flat-blade screwdriver if needed, and drain until the coolant level is below the hose you’re changing.
• Close the drain when done (snug only—do not overtighten).

Step 4: Remove the old hose clamps

• Use hose clamp pliers to compress the spring clamp and slide it back on the hose.
• If the clamp is a screw-type, loosen it using a flat-blade screwdriver (medium).
• Clamp pliers hold pressure for you.

Step 5: Remove the old radiator hose

• Twist the hose near the end to break it free. Use slip-joint pliers gently if it’s stuck.
• If it won’t budge, carefully work the edge loose with a pick tool (small) to break the seal.
• Pull the hose off and aim it into the drain pan—some coolant will spill.

Step 6: Clean the hose connection surfaces

• Wipe the radiator neck and engine neck with shop towels.
• If there’s stuck rubber, gently clean it with a razor blade scraper (do not gouge the plastic/metal).

Step 7: Install the new hose and clamps

• Slide the new hose clamps onto the new hose first (use hose clamp pliers if spring clamps).
• Push the new hose fully onto each neck until it seats against the stop/bead.
• Position clamps behind the raised bead on the neck, then release/tighten the clamp.
• Clamps must sit straight, not angled.

Step 8: Reinstall any splash shield (if removed)

• If you removed the lower splash shield, reinstall it using a 10mm socket and Phillips screwdriver #2 as applicable.
• Lower the car from the jack stands using the floor jack.

Step 9: Refill coolant

• Insert a funnel and refill the radiator with Honda-compatible coolant (Type 2 premix) until full.
• Fill the coolant reservoir to the MAX line.

Step 10: Bleed air and verify the repair

• Start the engine and set the heater to HOT with the fan on low.
• Let the engine idle and watch the coolant level in the radiator; add coolant as the level drops (use the funnel).
• Once the radiator fan cycles on and off and you see fewer bubbles, install the radiator cap by hand.
• Shut the engine off, let it cool fully, then recheck the radiator and reservoir levels and top off as needed.

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✅ After Repair

• With the engine warmed up, inspect both hose ends for seepage.
• Take a short drive, then recheck for leaks and confirm the temperature gauge stays normal.
• After a full cool-down, recheck the reservoir and top off to MAX.
• Dispose of old coolant properly (do not pour on the ground).

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💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

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

You Save: $210-$330 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.