🔧 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 pressurized coolant hoses, so the engine must be completely cool before opening the cooling system.

Assumption: This guide covers the upper or lower radiator hose; the steps note the differences where needed.

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

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⚠️ Safety & Precautions

• ⚠️ Never open the radiator cap or coolant reservoir cap when the engine is hot; hot coolant can spray and cause serious burns.
• ⚠️ Coolant is poisonous to people and animals. Wipe spills right away and store used coolant safely.
• ⚠️ Use jack stands if raising the front of the vehicle. A jack alone is not safe.
• ⚠️ Disconnecting the battery is not required for this radiator hose replacement.
• ⚠️ Do not mix random coolant types. Your Grand Cherokee uses Mopar OAT-type coolant or an approved equivalent.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Drain pan 2-gallon minimum
• Flat-blade screwdriver 1/4 inch
• Hose clamp pliers
• Slip-joint pliers 10 inch
• Pick tool 90-degree
• Trim clip removal tool
• 8mm socket
• 10mm socket
• 3/8 inch ratchet
• 3/8 inch extension 6 inch
• Torque wrench inch-pound
• Funnel spill-free cooling system kit (specialty)
• Floor jack rated 3-ton minimum
• Jack stands rated 3-ton minimum
• 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 if replacing lower hose
• Radiator hose clamps - Qty: 2 per hose if clamps are weak, rusty, or damaged
• Mopar OAT coolant concentrate or premixed OAT coolant - Qty: 1-2 gallons
• Distilled water - Qty: 1 gallon if using coolant concentrate

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📋 Before You Begin

• Park your Grand Cherokee on level ground and let the engine cool completely for at least 2-3 hours.
• Set the parking brake and place the transmission in Park.
• If replacing the lower radiator hose, raise the front with a floor jack rated 3-ton minimum and support it with jack stands rated 3-ton minimum.
• A hose clamp pliers tool squeezes the spring clamp tabs so the clamp can slide back without fighting it.
• A spill-free funnel locks into the coolant fill opening and helps burp trapped air from the cooling system.
• Set the cabin heat control to full hot before final warm-up. This helps coolant circulate through the heater core.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Let the Engine Cool

• Put on safety glasses and nitrile gloves.
• Touch the upper radiator hose carefully with your hand. It should feel cool, not warm or firm.
• Slowly loosen the coolant reservoir cap by hand only after the engine is fully cool.
• Cool engine first. No exceptions.

Step 2: Remove Access Panels if Needed

• Use a trim clip removal tool to remove any plastic push clips blocking access near the radiator support or lower splash shield.
• Use an 8mm socket, 3/8 inch ratchet, and 3/8 inch extension 6 inch to remove small shield fasteners if the lower hose area is covered.
• Set all clips and bolts in a cup so they do not get lost.

Step 3: Drain Some Coolant

• Place a drain pan 2-gallon minimum under the radiator drain area and lower hose area.
• If replacing the upper hose only, drain enough coolant so the level is below the upper hose connection.
• If replacing the lower hose, drain more coolant because the lower hose sits near the bottom of the system.
• Use a flat-blade screwdriver 1/4 inch only if your radiator drain valve needs gentle turning.
• Do not force the drain valve. If it feels stuck, leave it alone and expect coolant to drain when the hose is removed.

Step 4: Move the Hose Clamps Back

• Use hose clamp pliers to squeeze the spring clamp tabs at the radiator end of the hose.
• Slide the clamp several inches back onto the hose.
• Repeat this at the engine end of the hose using hose clamp pliers or slip-joint pliers 10 inch.
• If your replacement uses worm-gear clamps, loosen them with a flat-blade screwdriver 1/4 inch.
• Take a photo before removing.

Step 5: Break the Hose Loose

• Twist the old hose by hand to break it free from the metal or plastic neck.
• If it is stuck, use a pick tool 90-degree to gently work around the hose edge.
• Do not dig into the radiator neck. The radiator neck can crack if pried too hard.
• If the hose will not release, use a flat-blade screwdriver 1/4 inch very gently between the rubber and fitting, then twist again by hand.

Step 6: Remove the Old Radiator Hose

• Pull the hose off the radiator side first by hand.
• Hold the hose upward to reduce spilling, then remove the engine side by hand.
• Let coolant drain into the drain pan 2-gallon minimum.
• Compare the old hose to the new radiator hose before installing it. The bends and length must match.

Step 7: Clean the Hose Connections

• Use shop towels to wipe the radiator neck and engine-side hose neck clean.
• Inspect the radiator neck for cracks, deep corrosion, or broken plastic.
• Do not use sandpaper on plastic radiator fittings.
• If old rubber is stuck, use a pick tool 90-degree gently to lift it away.

Step 8: Install the New Hose

• Slide the clamps onto the new radiator hose before installing the hose.
• Push the hose fully onto the engine-side neck by hand until it seats past the raised bead.
• Push the other end fully onto the radiator neck by hand until it seats past the raised bead.
• The raised bead is the bump on the fitting that helps keep the hose from sliding off.
• Make sure the hose is not twisted, kinked, or touching the fan, belt, pulleys, or sharp brackets.

Step 9: Position and Tighten the Clamps

• Use hose clamp pliers to move each spring clamp into its original position behind the raised bead.
• If using worm-gear clamps, tighten them evenly with a flat-blade screwdriver 1/4 inch.
• For worm-gear clamps, tighten snug only; do not crush plastic radiator fittings.
• If using constant-tension spring clamps, there is no torque spec. Seat the clamp squarely in the original clamp mark.
• If any shield bolts were removed, reinstall them with an 8mm socket and torque wrench inch-pound. Torque to 4 Nm (35 in-lbs).

Step 10: Refill the Cooling System

• Install the funnel spill-free cooling system kit at the coolant fill point.
• Add Mopar OAT coolant concentrate or premixed OAT coolant slowly through the funnel.
• If using concentrate, mix it 50/50 with distilled water before filling.
• Fill until the coolant level reaches the proper cold mark on the reservoir.
• Do not use HOAT, green universal coolant, or unknown leftover coolant.

Step 11: Bleed Air from the System

• Leave the funnel spill-free cooling system kit installed.
• Start the engine and set the heater to full hot with the blower on low.
• Watch the coolant level in the funnel. Add coolant as the level drops.
• Let the engine warm up until the thermostat opens and the upper hose gets hot.
• Use safety glasses and keep hands away from belts and the cooling fan.
• Squeeze the upper hose gently by hand a few times to help move trapped air.
• When bubbles stop and heat blows warm from the vents, turn the engine off.

Step 12: Final Coolant Level Check

• Let the engine cool fully again.
• Remove the funnel spill-free cooling system kit carefully.
• Install the coolant cap by hand until fully seated.
• Check the coolant reservoir level and top off to the cold mark if needed.
• Use shop towels to dry the hose connections so leaks are easy to spot.

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✅ After Repair

• ✅ Start the engine and inspect both hose ends for drips or seepage.
• ✅ Watch the temperature gauge during the first drive. It should stay in the normal range.
• ✅ After the first full heat-up and cool-down cycle, recheck coolant level at the reservoir.
• ✅ Recheck the hose clamps after one day of driving.
• ✅ Dispose of used coolant at a proper recycling or hazardous-waste collection site.
• ✅ If the engine overheats, the cabin heat goes cold, or the coolant level keeps dropping, stop driving and recheck for trapped air or leaks.

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💰 DIY vs Shop Cost

Shop Cost: $180-$350 parts + labor

DIY Cost: $35-$120 parts only

You Save: $145-$230 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-1.5 hours.

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🎯 Ready to get started?

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