🔧 Grand Cherokee - Radiator Hose Replacement

This repair replaces a leaking, swollen, cracked, or soft radiator hose on your Grand Cherokee. The 5.7L V8 uses an upper and lower radiator hose; the steps below cover both, so replace the hose that is damaged.

Difficulty Level: Beginner | Estimated Time: 1-2 hours

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⚠️ Safety & Precautions

• ⚠️ Only work on the cooling system when the engine is fully cold. Hot coolant can cause serious burns.
• ⚠️ Do not remove the radiator cap or coolant pressure cap while the engine is hot.
• ⚠️ Coolant is poisonous to people and animals. Catch it in a drain pan and recycle it properly.
• ⚠️ Keep coolant off drive belts and electrical connectors.
• ⚠️ Battery disconnect is not normally required for radiator hose replacement on your Grand Cherokee.

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🔧 Required Tools

You'll need the following tools for this repair:

• Flat-blade screwdriver
• Hose clamp pliers
• Slip-joint pliers
• Pick tool set
• Trim clip removal tool
• 8mm socket
• 10mm socket
• 3/8-inch drive ratchet
• 3/8-inch drive extension
• Drain pan 2-gallon minimum
• Funnel with long neck
• Cooling system pressure tester (specialty)
• Shop towels
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Upper radiator hose - Qty: 1 if replacing upper hose
• Lower radiator hose - Qty: 1 if replacing lower hose
• Radiator hose clamps - Qty: 2 per hose if clamps are weak, rusty, or damaged
• Mopar-compatible OAT coolant concentrate meeting MS-12106 - Qty: 1 gallon
• Distilled water - Qty: 1 gallon if using concentrate
• Premixed 50/50 Mopar-compatible OAT coolant meeting MS-12106 - Qty: 1-2 gallons if using premix

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📋 Before You Begin

• Park your Grand Cherokee on level ground and let the engine cool completely.
• Set the parking brake and place the transmission in Park.
• Open the hood and locate the coolant reservoir and radiator hoses.
• The upper radiator hose runs from the top of the radiator to the engine thermostat area.
• The lower radiator hose runs from the bottom of the radiator to the lower engine/water pump area.
• A spring clamp is a factory clamp that squeezes the hose using spring tension. Hose clamp pliers make it much easier to remove.
• Use only OAT coolant meeting Chrysler/Mopar MS-12106. Do not mix it with green universal coolant.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Cool the Engine and Remove the Pressure Cap

• Put on safety glasses and nitrile gloves.
• Make sure the engine is cold to the touch.
• Slowly remove the coolant pressure cap from the coolant reservoir by hand.
• If you hear pressure escaping, stop and wait longer before removing the cap fully.
• Cold engine only.

Step 2: Raise Access if Needed

• For the upper hose, you usually can work from above with basic hand tools.
• For the lower hose, use the 8mm socket, 10mm socket, 3/8-inch drive ratchet, and trim clip removal tool to remove any lower splash shield panels blocking access.
• Set all screws and clips aside in order so they go back in the same spots.

Step 3: Drain Some Coolant

• Place the drain pan 2-gallon minimum under the radiator drain area and lower hose area.
• If using the radiator drain, open it carefully with your hand or a flat-blade screwdriver if needed.
• Drain enough coolant so the level sits below the hose you are replacing.
• If the drain is hard to reach, loosen the lower hose slowly and let coolant drain into the pan.
• Close the radiator drain by hand once coolant flow slows.
• Do not overtighten the plastic radiator drain.

Step 4: Remove the Hose Clamps

• Use hose clamp pliers to squeeze the tabs on the spring clamp.
• Slide the clamp several inches back onto the hose.
• If your hose has worm-gear clamps, loosen them with a flat-blade screwdriver.
• Repeat this on both ends of the hose.
• Take a photo first.

Step 5: Break the Hose Loose

• Twist the hose by hand to break it free from the radiator or engine fitting.
• If it is stuck, use a pick tool carefully between the hose and fitting to loosen the rubber seal.
• Do not pry hard against plastic radiator necks. They can crack.
• If needed, use slip-joint pliers gently on the hose only, not on the radiator neck.

Step 6: Remove the Old Hose

• Pull the hose off both fittings by hand.
• Keep the drain pan 2-gallon minimum under the hose because more coolant will spill.
• Compare the old hose to the new hose before installing it.
• Make sure the bends, length, and inside diameter match.

Step 7: Clean the Hose Fittings

• Use shop towels to wipe the radiator neck and engine fitting clean.
• Use the pick tool only to remove stuck rubber pieces if needed.
• Do not scratch aluminum or plastic sealing surfaces.
• The hose fittings must be clean and smooth so the new hose seals properly.

Step 8: Install the New Hose

• Slide the clamps onto the new hose before installing the hose.
• Push the new hose fully onto the radiator fitting and engine fitting by hand.
• The hose should seat past the raised bead on each fitting.
• Use hose clamp pliers to move each spring clamp into its original position.
• If using worm-gear clamps, tighten with a flat-blade screwdriver until snug.
• Do not overtighten worm-gear clamps on plastic radiator fittings.
• Clamp behind the bead.

Step 9: Reinstall Lower Panels if Removed

• Use the 8mm socket, 10mm socket, 3/8-inch drive ratchet, and trim clip removal tool to reinstall any splash shield panels.
• Hand-start all screws first to avoid cross-threading.
• Tighten small splash shield fasteners snug only.

Step 10: Refill the Cooling System

• Place the funnel with long neck into the coolant reservoir opening.
• Add premixed 50/50 Mopar-compatible OAT coolant meeting MS-12106.
• If using concentrate, mix Mopar-compatible OAT coolant concentrate meeting MS-12106 with distilled water at a 50/50 ratio before adding it.
• Fill the reservoir to the COLD FILL mark.
• Install the coolant pressure cap by hand.

Step 11: Warm the Engine and Bleed Air

• Start the engine and let it idle.
• Set the cabin heat to maximum temperature and low fan speed using the climate controls.
• Watch the temperature gauge. It should rise normally and stay stable.
• After the thermostat opens, the upper hose will become warm and firm.
• Shut the engine off and let it cool completely.
• Recheck the coolant level and top off to the COLD FILL mark using the funnel with long neck.

Step 12: Pressure-Test for Leaks

• Install the cooling system pressure tester onto the coolant reservoir.
• Pump the tester to the pressure listed on the coolant cap.
• Inspect both hose ends for leaks.
• If coolant leaks, release pressure, reposition the clamp with hose clamp pliers, and retest.
• Remove the pressure tester and reinstall the cap by hand.

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✅ After Repair

• Drive your Grand Cherokee for 10-15 minutes while watching the temperature gauge.
• Let the engine cool fully, then recheck coolant level at the reservoir.
• Look under the front of the vehicle for drips after the test drive.
• Recheck the hose clamps after one full heat cycle.
• Recycle old coolant at an approved automotive fluid recycling location.
• If the engine overheats, the heater blows cold, or coolant level keeps dropping, stop driving and inspect for trapped air or another leak.

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💰 DIY vs Shop Cost

Shop Cost: $180-$350 per hose, including parts, coolant, and labor

DIY Cost: $35-$110 per hose, plus coolant as needed

You Save: $100-$240 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.5 hours.

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🎯 Ready to get started?

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