🔧 Focus - Radiator Hose Replacement

Replacing a radiator hose means draining some coolant, removing the old hose and clamps, then installing the new hose and refilling/bleeding the cooling system. This prevents overheating and coolant leaks that can damage your engine.

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

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⚠️ Safety & Precautions

• ⚠️ Never open the coolant reservoir cap on a hot engine; hot coolant can spray out.
• ⚠️ Support your Focus with jack stands; never rely on a floor jack alone.
• ⚠️ Coolant is toxic to people and pets—catch all coolant and clean spills.
• Let the engine cool fully (upper radiator hose should feel cool to the touch).
• 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
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Drain pan (at least 2-gallon)
• Hose clamp pliers (specialty)
• Channel-lock pliers
• Pick tool (small) (specialty)
• Flat-blade screwdriver
• 7mm socket
• 8mm socket
• 1/4" ratchet
• 3" extension
• Funnel
• Trim clip tool (specialty)
• Torque wrench (inch-pound or small ft-lb)

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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 spring clamps - Qty: 2-4
• Engine coolant (Motorcraft Orange concentrate or equivalent meeting Ford spec) - Qty: 1 gallon
• Distilled water - Qty: 1 gallon
• Shop towels - Qty: 1

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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.
• Locate the coolant reservoir (also called the degas bottle—it’s the plastic tank where you add coolant).
• Set your drain pan under the front of the car before you loosen any hoses.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Depressurize the cooling system

• Slowly loosen the coolant reservoir cap by hand (only when cold), then remove it fully.

Step 2: Raise the front (for the lower hose)

• Use a floor jack (rated 3-ton minimum) to lift the front of your Focus at the correct front jacking point.
• Place jack stands (rated 3-ton minimum) and lower the car onto them.

Step 3: Remove the lower splash shield (if equipped)

• Use a 7mm socket with a 1/4" ratchet and 3" extension to remove the small screws.
• If your screws are 8mm, use an 8mm socket instead.
• Use a trim clip tool (specialty) to pop any plastic clips without breaking them.

Step 4: Drain enough coolant for a hose swap

• Position the drain pan (at least 2-gallon) under the lower radiator area.
• If your radiator has a drain cock (small plastic drain valve), open it carefully by hand or with a flat-blade screwdriver if needed.
• If there is no drain cock (or it’s stuck), you can drain by loosening the lower hose clamp instead (next step). Expect a fast spill.

Step 5: Remove the lower radiator hose

• Use hose clamp pliers (specialty) to compress the spring clamp and slide it back on the hose.
• Twist the hose by hand to break it loose from the fitting.
• If it’s stuck, use a pick tool (small) (specialty) to gently lift the hose edge to let air in, then twist again.
• Pull the hose off and aim it into the drain pan.

Step 6: Remove the upper radiator hose

• From the top of the engine bay, place the drain pan under the front of the engine area (coolant will still drip).
• Use hose clamp pliers (specialty) to move the spring clamps back from each end of the upper hose.
• Twist the hose to free it, then pull it off both fittings.

Step 7: Prep the fittings and compare parts

• Use shop towels to wipe the radiator neck and engine-side fittings clean.
• Compare the new hose to the old hose for matching bends and end shapes.
• If your spring clamps feel weak or rusty, replace them. Good clamps prevent comebacks.

Step 8: Install the new hoses

• Slide the clamps onto the new hose first.
• Push the hose fully onto each fitting until it seats against the stop/bead.
• Use hose clamp pliers (specialty) to position the spring clamp in the same spot as original (behind the raised bead on the fitting).
• If you are using screw-type clamps instead of spring clamps, tighten with a flat-blade screwdriver or the correct socket and stop when snug; do not crush the plastic radiator neck.

Step 9: Reinstall the splash shield and lower the car

• Reinstall the shield using the 7mm socket (or 8mm socket as needed) and any clips with the trim clip tool (specialty).
• Use the floor jack (rated 3-ton minimum) to lift slightly, remove jack stands, then lower the car.

Step 10: Refill coolant and bleed air

• Mix coolant 50/50: use Motorcraft Orange concentrate with distilled water (unless you bought pre-mix).
• Use a funnel to fill the coolant reservoir to the MAX line.
• Start the engine and set the heater to HOT (this opens the heater circuit).
• Let it idle until the temperature gauge reaches normal operating range; watch for leaks.
• Shut the engine off, let it cool, then recheck and top off to MAX.

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✅ After Repair

• Check for leaks at both ends of each hose while the engine is running and after a test drive.
• Verify the heater blows hot air (a sign coolant is circulating).
• Recheck coolant level the next morning when fully cold; top off if needed.
• Dispose of old coolant properly at a recycling center or parts store that accepts fluids.

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💰 DIY vs Shop Cost

Shop Cost: $250-$500 (parts + labor)

DIY Cost: $50-$140 (parts only)

You Save: $200-$360 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.