🔧 Grand Cherokee - Radiator Hose Replacement

On your Grand Cherokee, the radiator hoses carry coolant between the radiator and the engine. Replacing a leaking, swollen, or cracked hose is straightforward, but you must work on a fully cool engine to avoid a dangerous hot-coolant spray.

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

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⚠️ Safety & Precautions

• ⚠️ Only work when the engine is completely cold; hot coolant can cause severe burns.
• ⚠️ Keep hands/tools away from the electric cooling fan; it can turn on unexpectedly.
• ⚠️ Support the SUV with jack stands if you go underneath; never rely on a jack alone.
• ⚠️ Clean spills immediately; coolant is toxic to pets and people.
• ⚠️ 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
• Drain pan (at least 3-gallon)
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Slip-joint pliers
• Hose clamp pliers (specialty)
• Flathead screwdriver
• Pick tool set
• Trim clip removal tool
• 8mm socket
• 10mm socket
• 3/8" ratchet
• 3/8" extension (6")
• Funnel (spill-free type)
• Shop rags

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Radiator hose (upper or lower) - Qty: 1
• Hose clamps - Qty: 2
• Coolant (Mopar OAT 50/50 premix) - Qty: 2 gallons

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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 (ideally 3+ hours).
• Slowly loosen the coolant reservoir cap to relieve any residual pressure, then reinstall it loosely while you set up. Use shop rags for grip.
• If you’re doing the lower hose, plan to raise the front and support it on jack stands.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Identify which hose you’re replacing

• Open the hood and locate the two main hoses: the upper hose runs to the top area of the radiator, and the lower hose runs to the bottom area of the radiator.
• Look closely at each end to identify the connection type:
• Spring clamp: a round clamp you squeeze with hose clamp pliers (specialty) or slip-joint pliers.
• Screw clamp: a clamp with a screw you loosen/tighten with a flathead screwdriver or 8mm socket.
• Take a photo before you remove anything.

Step 2: Make room for access (upper hose area)

• If needed, loosen the air intake duct clamps using an 8mm socket and 3/8" ratchet, then move the duct aside.
• If you remove any small brackets or retainers, use a 10mm socket and 3/8" ratchet as required.
• Torque: If you removed any 10mm fasteners, Torque to the same snugness they had originally (hose replacement itself typically has no bolt torque points).

Step 3: Position the drain pan and prepare to catch coolant

• Place a drain pan under the radiator end of the hose you’re removing.
• Lay shop rags under the connection to control splash.

Step 4: Release the clamp at the radiator end

• For a spring clamp: squeeze the clamp ears with hose clamp pliers (specialty) and slide the clamp back on the hose about 2 inches.
• For a screw clamp: loosen it with a flathead screwdriver or 8mm socket until it spins freely, then slide it back.
• Don’t remove the clamp from the hose yet.

Step 5: Break the hose free (without cracking fittings)

• Twist the hose end back and forth by hand to break it loose.
• If it’s stuck, carefully work the edge with a pick tool to lift the hose off the nipple a little at a time.
• Pull the hose off and let coolant drain into the drain pan.
• Important: Do not pry hard against plastic radiator necks; they can crack.

Step 6: Release the clamp and remove the hose at the engine end

• Repeat the clamp release using hose clamp pliers (specialty) or an 8mm socket/flathead screwdriver (depending on clamp type).
• Twist and pull the hose off the engine-side fitting and remove the hose from the vehicle.

Step 7: Prep the fittings and compare parts

• Wipe both fittings clean with shop rags.
• Compare the old hose and new hose side-by-side to confirm same bends, diameter, and length.
• If the inside of the old hose left rubber stuck on the fitting, gently remove it with a pick tool and wipe clean.

Step 8: Install the new hose

• Slide the clamps onto the new hose before installing it.
• Push the hose fully onto the engine-side fitting first.
• Position the clamp:
• Spring clamp: use hose clamp pliers (specialty) to move it into the original clamping location.
• Screw clamp: tighten with a flathead screwdriver or 8mm socket until firmly snug.
• Install the radiator-side end the same way, ensuring the hose is fully seated and routed like the original.
• Torque: Spring clamps are self-tensioning (no torque spec). For screw clamps, tighten only until the hose cannot rotate by hand.

Step 9: Reinstall anything removed for access

• Reinstall the air intake duct and tighten the clamps using an 8mm socket and 3/8" ratchet.
• Reinstall any brackets/retainers using a 10mm socket and 3/8" ratchet.

Step 10: Refill coolant and purge trapped air

• Use a funnel (spill-free type) to fill the coolant reservoir with Mopar OAT 50/50 premix up to the MAX line.
• Start the engine and set the HVAC to HOT with the fan on low (this helps coolant circulate through the heater core).
• Let the engine idle and watch the temperature gauge. As the engine warms up, top off as needed.
• Once warm, shut the engine off, let it cool fully, then recheck and adjust the level again.

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✅ After Repair

• Check for leaks at both ends of the new hose with the engine idling and again after a short drive.
• Verify cabin heat works normally; weak heat can mean air is still trapped.
• After the next cold soak (overnight is best), recheck coolant level and top off to the MAX line.
• Dispose of old coolant properly (do not dump).

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💰 DIY vs Shop Cost

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

DIY Cost: $60-$180 (parts only)

You Save: $190-$320 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-1.8 hours.

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🎯 Ready to get started?

Before I tailor the steps exactly to your Grand Cherokee, answer these two quick questions: are you replacing the upper or lower radiator hose, and do you have spring clamps or screw clamps on the hose ends?

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.