🔧 Accord - Radiator Hose Replacement

The radiator hoses carry coolant between the radiator and the engine. Replacing a cracked, swollen, or leaking hose prevents overheating and coolant loss.

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

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⚠️ Safety & Precautions

• ⚠️ Work only on a fully cold engine (coolant can cause severe burns).
• ⚠️ Never open the radiator cap when hot.
• ⚠️ Support the car with jack stands before going underneath.
• ⚠️ Clean spills immediately—coolant is slippery and harmful to pets.

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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 (2-ton minimum each)
• Wheel chocks
• Drain pan (at least 2-gallon)
• Funnel
• Pliers (hose clamp pliers preferred)
• Flat-blade screwdriver
• 10mm socket
• Ratchet
• 12mm wrench
• Pick tool (small) (specialty)
• Torque wrench (3/8" drive)
• Shop rags

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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: 2-4
• Engine coolant (Honda Type 2 premix) - Qty: 1-2 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 completely (overnight is best).
• ⬆️ Jack up the front and set the car securely on jack stands.
• 🧰 If you’re replacing the lower hose, plan to remove the lower splash shield for access.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve pressure safely

• Use your hand to slowly loosen the radiator cap only when the engine is cold.
• Use a shop rag to cover the cap as you remove it.

Step 2: Drain enough coolant

• Place a drain pan under the radiator drain area.
• Use a flat-blade screwdriver to open the radiator drain cock (petcock) a few turns and drain until the radiator level drops below the hose you’re replacing.
• Close the drain cock by hand snug. Do not over-tighten.
• Tip: Drain less = less mess later.

Step 3: Remove the upper radiator hose (radiator to engine)

• Use pliers (or hose clamp pliers) to squeeze the spring clamp and slide it back on the hose.
• Use your hand to twist the hose to break it free, then pull it off the radiator neck.
• Repeat at the engine-side connection and remove the hose.
• If it’s stuck, use a pick tool 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).

Step 4: Remove the lower radiator hose (radiator to thermostat housing)

• Use a floor jack and jack stands (already set) to safely access the bottom area.
• Use a 10mm socket and ratchet to remove the lower splash shield fasteners if equipped.
• Position the drain pan under the lower hose area (more coolant will come out).
• Use pliers to compress the spring clamps and slide them back.
• Twist and pull the hose off the radiator, then off the engine-side fitting.

Step 5: Prep the fittings (important for sealing)

• Use a shop rag to wipe the radiator neck(s) and engine fittings clean.
• Make sure old rubber isn’t stuck on the fitting. Use the pick tool gently if needed.
• Inspect the radiator neck for cracks. If cracked, do not continue until the radiator is replaced.

Step 6: Install the new hose(s) and clamps

• Slide the clamp(s) onto the new hose before installing it.
• Push the hose fully onto the fitting until it bottoms out against the stop bead.
• Use pliers to position each spring clamp centered over the fitting bead.
• If using screw clamps instead, use a flat-blade screwdriver to tighten them snug (do not crush the hose).

Step 7: Reinstall splash shield (if removed)

• Use a 10mm socket and ratchet to reinstall the splash shield fasteners.
• Torque to 9 Nm (80 in-lbs) if using a torque wrench on the small 10mm bolts.

Step 8: Refill and bleed air from the cooling system

• Use a funnel to fill the radiator with Honda Type 2 premix coolant until full.
• Fill the overflow reservoir to the MAX line.
• Locate the cooling system air bleed bolt near the thermostat housing area.
• Use a 12mm wrench to open the bleed bolt slightly.
• Add coolant until a steady stream (no bubbles) comes out, then close it.
• Torque to 10 Nm (7 ft-lbs) on the bleed bolt.
• Reinstall the radiator cap.

Step 9: Warm up and top off

• Start the engine and let it idle.
• Set the heater to full hot (this helps move coolant through the heater core).
• Watch the temperature gauge and check for leaks at both ends of each hose.
• Let the engine run until the cooling fans cycle on and off at least once.
• Shut the engine off, let it cool полностью, then recheck the overflow reservoir and top off to MAX if needed.

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✅ After Repair

• 🔍 Inspect for seepage around each clamp after the first drive.
• 🌡️ Confirm the temperature gauge stays normal and the heater blows hot.
• 🧴 Recheck coolant level in the overflow bottle for the next 2-3 cold starts and top off if needed.
• 🧼 Dispose of old coolant properly (never dump it on the ground).

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💰 DIY vs Shop Cost

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

DIY Cost: $60-$160 (parts only)

You Save: $190-$290 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-1.5 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.