🔧 Durango - Radiator Hose Replacement

Replacing a radiator hose stops coolant leaks and prevents overheating. You’ll drain some coolant, swap the hose, then refill and bleed (remove trapped air) so your cooling system works correctly.

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

Quick questions (so I guide you perfectly): Is it the upper hose (top of radiator to engine) or lower hose (bottom of radiator to engine)? And do your hose ends use spring clamps or screw clamps?

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⚠️ Safety & Precautions

• ⚠️ Never open the coolant cap on a hot engine; scalding risk.
• ⚠️ Support the Durango on jack stands if you lift it—never rely on a jack alone.
• ⚠️ Coolant is toxic—keep it off skin, paint, and away from pets.
• ⚠️ If the electric fans turn on, keep hands clear (they can run unexpectedly).
• 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
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Drain pan (at least 10-quart)
• Hose clamp pliers
• Channel-lock pliers
• Pick tool set
• Flat-blade screwdriver
• 1/4" drive ratchet
• 8mm socket
• 10mm socket
• Trim clip remover
• Funnel
• Clean shop rags
• Torque wrench (inch-pound)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Radiator hose (upper or lower, as needed) - Qty: 1
• Hose clamps (matching style/size) - Qty: 2
• Engine coolant (OAT type, 50/50 premix) - Qty: 1-2 gallons
• Distilled water (if using concentrate coolant) - Qty: 1-2 gallons

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📋 Before You Begin

• Park on level ground, set the parking brake, and use wheel chocks.
• Let the engine cool completely (ideally 2+ hours).
• Place a drain pan under the front of the Durango before loosening anything.
• Take a photo of hose routing first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve pressure safely

• Put on safety glasses and nitrile gloves.
• Slowly loosen the coolant reservoir cap by hand. If you hear pressure, tighten it back and wait longer for the engine to cool.

Step 2: Raise the front (if needed for access)

• Use a floor jack (rated 3-ton minimum) to lift the front at the approved jacking point.
• Set the Durango onto jack stands (rated 3-ton minimum) and keep wheel chocks in place.

Step 3: Remove lower splash shield (if equipped)

• Use a trim clip remover for plastic fasteners.
• Use an 8mm socket and 1/4" drive ratchet for small bolts/screws.
• Set hardware aside in a small tray.

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

• Place the drain pan (at least 10-quart) under the radiator.
• If accessible, open the radiator drain (petcock) by hand or with a flat-blade screwdriver (only if it has a screwdriver slot).
• If the drain isn’t accessible, you can carefully loosen the lower hose clamp (next step) and let coolant drain into the pan.

Step 5: Identify your hose and clamp style

• Upper hose: runs from the top radiator outlet to the engine/thermostat housing area.
• Lower hose: runs from the bottom radiator outlet to the engine/water pump area.
• Spring clamp = a constant-tension clamp you squeeze with pliers to move it. Use hose clamp pliers (they lock and hold the clamp open).
• Screw clamp = a clamp with a screw. Use a flat-blade screwdriver or 8mm socket.

Step 6: Remove the first clamp

• Put rags under the connection using clean shop rags.
• For a spring clamp: squeeze it with hose clamp pliers and slide it back on the hose 2-3 inches.
• For a screw clamp: loosen it with an 8mm socket and 1/4" drive ratchet (or flat-blade screwdriver), then slide it back.

Step 7: Break the hose loose (without damaging the fitting)

• Twist the hose near the end by hand. If it’s stuck, gently work a pick tool under the hose edge to break the seal.
• Do not pry hard against the radiator neck—plastic/aluminum fittings can crack.
• Twist first; pull last.

Step 8: Remove the hose

• Pull the hose off the first fitting and aim it into the drain pan for any remaining coolant.
• Repeat Steps 6–7 for the other end and remove the hose fully.

Step 9: Inspect and clean the sealing surfaces

• Wipe the radiator neck and engine-side fitting using clean shop rags.
• Remove crusty buildup carefully with a pick tool, but don’t gouge the metal/plastic.
• If a fitting is cracked or deeply pitted, stop—replacing the hose won’t seal reliably.

Step 10: Install the new hose (correct orientation)

• Match the new hose bends to the old one before installing.
• Slide the clamps onto the hose first.
• Push the hose fully onto each fitting until it bottoms out (no visible gap).

Step 11: Position and tighten clamps

• Place each clamp behind the raised bead on the fitting (this helps prevent blow-off).
• For spring clamps: use hose clamp pliers to move the clamp into position and release it.
• For screw clamps: tighten with an 8mm socket and 1/4" drive ratchet until snug and evenly seated.
• Torque to 3–5 Nm (27–44 in-lbs) if you’re using a torque wrench on a worm-gear clamp and the clamp manufacturer provides a spec.

Step 12: Reinstall splash shield (if removed)

• Reinstall with the trim clip remover (clips) and 8mm socket (bolts).

Step 13: Refill coolant

• Use a funnel and add OAT type, 50/50 premix coolant into the coolant reservoir to the “MAX” line.
• If you drained a lot, add in small amounts and wait between pours so it can flow into the system.

Step 14: Bleed air and check for leaks

• Start the engine and set the HVAC to HOT with the fan on low.
• Let it idle while watching the hose connections with a flashlight and clean shop rags ready.
• As the engine warms up, the coolant level may drop—top off with the funnel as needed.
• When the radiator hose feels hot and firm and the cabin heat is steady, shut the engine off and let it cool fully, then recheck level.

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✅ After Repair

• After the first full cool-down, recheck coolant level and add to the “MAX” line if needed.
• Inspect for seepage around both hose ends after your first 10–15 minute drive.
• Look under the Durango the next morning for drips.
• Dispose of old coolant properly (most parts stores accept it).

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💰 DIY vs Shop Cost

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

DIY Cost: $40-$140 (parts only)

You Save: $110-$460 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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