🔧 Grand Cherokee - Radiator Hose Replacement

Replacing a radiator hose stops coolant leaks and prevents overheating. On your Grand Cherokee there’s usually an upper hose (top of radiator) and a lower hose (bottom of radiator), and the steps are very similar.

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

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⚠️ Safety & Precautions

• ⚠️ Never open the radiator cap on a hot engine; hot coolant can spray and burn.
• ⚠️ Support the SUV with jack stands if you lift it—never rely on a jack alone.
• ⚠️ Coolant is toxic to people and pets; catch it in a pan and clean spills immediately.
• ⚠️ Keep hands/tools clear of the fan area; the fan can start unexpectedly on some setups.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Drain pan (at least 10-quart)
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Flat-blade screwdriver (medium)
• 8mm nut driver
• Hose clamp pliers (specialty)
• Pick tool (small hook)
• Slip-joint pliers
• Razor scraper (plastic)
• Funnel
• Shop rags
• Work light
• Tire iron or 22mm lug socket
• Torque wrench (20–200 ft-lbs range)

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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
• Hose clamps - Qty: 2
• Engine coolant (HOAT, Mopar-compatible) - Qty: 1–2 gallons
• Distilled water - Qty: 1–2 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 (cold upper hose to the touch).
• Set your HVAC to HEAT (full hot). This helps coolant flow through the heater core during refill.
• Place a drain pan under the radiator area before loosening anything.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Identify which hose you’re replacing

• The upper radiator hose runs from the top of the radiator to the engine’s thermostat housing area.
• The lower radiator hose runs from the bottom of the radiator to the water pump area (lower front of engine).
• Match the new hose bends to the old hose.

Step 2: Safely relieve any leftover pressure

• Use shop rags to cover the radiator cap (or coolant reservoir cap), then slowly loosen it.
• If you hear hissing, stop and wait until it fully vents, then remove the cap.

Step 3: Drain enough coolant to get the hose off without a mess

• Position the drain pan under the lower radiator area.
• If accessible, open the radiator drain (petcock) by hand or with a flat-blade screwdriver (only if it has a screwdriver slot).
• Drain until the coolant level is below the hose you’re replacing, then close the drain snugly (do not overtighten).

Step 4 (If needed): Gain access to the lower hose

• If the lower hose is hard to reach from above, raise the front with a floor jack (rated 3-ton minimum) and support with jack stands (rated 3-ton minimum).
• If you remove a front wheel for access, loosen/tighten lug nuts with a tire iron or 22mm lug socket and final-tighten with a torque wrench: Torque to 135 Nm (100 ft-lbs).

Step 5: Remove the hose clamps

• If you have spring clamps (squeezed tabs), compress them using hose clamp pliers (specialty) and slide the clamp back on the hose.
• If you have worm-gear clamps (screw type), loosen them using an 8mm nut driver or flat-blade screwdriver, then slide the clamp back.
• Slide the clamp 2–3 inches away from the hose end.

Step 6: Break the hose loose (without breaking the radiator neck)

• Twist the hose at the connection by hand; if it’s stuck, use slip-joint pliers gently to rotate it (don’t crush it if you plan to reuse).
• If it still won’t release, carefully slip a pick tool (small hook) under the hose edge to break the seal.
• Pull the hose off and aim it into the drain pan as coolant drains out.

Step 7: Clean and inspect the connection points

• Wipe the radiator neck/engine fitting with shop rags.
• If there’s crusty buildup, lightly clean it with a razor scraper (plastic).
• Inspect the radiator neck for cracks and the fitting bead (the “lip” that holds the hose) for damage.

Step 8: Install the new hose and clamps

• Slide the new clamp(s) onto the new hose before installing the hose.
• Push the hose fully onto the radiator neck and engine fitting until it bottoms out.
• Position the clamp behind the raised bead/lip on the fitting, then tighten:
  • Use hose clamp pliers (specialty) to release spring clamps into place.
  • Use an 8mm nut driver for worm-gear clamps and tighten until snug (do not strip).

Step 9: Refill coolant

• Insert a funnel and refill with the correct HOAT, Mopar-compatible coolant mixed 50/50 with distilled water (unless using pre-mix).
• Fill the radiator (if it has a cap) and bring the overflow reservoir to the correct “COLD” line.

Step 10: Bleed air (burp) and check for leaks

• Start the engine and let it idle while watching the temperature gauge.
• Turn the cabin heat on high and verify you get hot air.
• As it warms up, carefully squeeze the upper hose a few times to help move trapped air.
• Shut the engine off, let it cool, then top off the radiator/reservoir as needed using the funnel.

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✅ After Repair

• Recheck for leaks around both ends of the hose with the engine fully warmed up.
• Verify the temperature gauge stays normal and the heater remains hot.
• After the next 1–2 drives (and once fully cooled), recheck the reservoir level and top off if needed.
• Dispose of old coolant properly (most parts stores accept waste fluids).

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💰 DIY vs Shop Cost

Shop Cost: $250–$550 (parts + labor)

DIY Cost: $40–$140 (parts only)

You Save: $210–$410 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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🎯 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.