🔧 Grand Caravan - Radiator Hose Replacement

Replacing a radiator hose stops coolant leaks and prevents overheating. On your Grand Caravan, there are usually two main radiator hoses: the upper (hot coolant to the radiator) and the lower (cooled coolant back to the engine).

Assumption: I’m covering both upper and lower hose styles (spring-clamp and quick-connect) since both are commonly used on this platform.

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

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⚠️ Safety & Precautions

• ⚠️ Never open the coolant cap on a hot engine; hot coolant can spray and burn you.
• ⚠️ Support the van with jack stands; never rely on a jack alone.
• ⚠️ Coolant is toxic to people and pets—catch it in a drain pan and clean spills immediately.
• ⚠️ Keep hands/loose clothing away from the cooling fans; they can turn on unexpectedly.
• Battery disconnect is not required, but keep tools away from the battery positive terminal.

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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)
• Trim clip remover
• Flathead screwdriver
• Hose clamp pliers (specialty)
• Pick tool (small hook pick)
• Coolant funnel with spill stopper
• Pliers
• 8mm socket
• 10mm socket
• Ratchet
• 3/8" torque wrench
• Work light

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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
• Radiator hose clamps - Qty: 2-4
• OAT engine coolant (Mopar compatible, 50/50 premix) - Qty: 1-2 gallons
• Distilled water - Qty: 1 gallon (only if using concentrate coolant)

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📋 Before You Begin

• Park on level ground, set the parking brake, and install wheel chocks.
• Let the engine cool completely (radiator hoses should feel cool to the touch).
• Set the HVAC to Heat (full hot) later during bleeding; this helps move coolant through the heater core.
• Place a drain pan under the radiator area before you disconnect any hose.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise the front safely (for lower hose access)

• Use a floor jack (rated 3-ton minimum) to lift the front jacking point.
• Set the van onto jack stands (rated 3-ton minimum) and confirm it’s stable.

Step 2: Remove the lower splash shield (if equipped)

• Use a trim clip remover and flathead screwdriver to remove the plastic clips/screws holding the shield.
• Set hardware aside so you don’t lose it. Take a quick photo for reassembly.

Step 3: Relieve pressure and prep for draining

• Slowly loosen the coolant reservoir cap by hand (only when cool).
• Place the drain pan (at least 10-quart) under the radiator lower corner area.

Step 4: Drain enough coolant so the hose won’t gush

• If you can access the radiator drain, open it carefully and drain into the pan. Use pliers only if needed (don’t crush the plastic).
• If the drain is hard to reach, you can skip it and simply be ready for coolant loss when the hose comes off (still keep the pan in place).

Step 5: Remove the upper radiator hose (if replacing)

• Locate the upper hose running from the radiator to the engine.
• For spring clamps: use hose clamp pliers (specialty) to squeeze the clamp and slide it back on the hose.
• For worm-gear clamps (screw type): loosen using a flathead screwdriver.
• Break the hose seal: gently twist the hose by hand. If stuck, use a pick tool (small hook pick) to lift the hose edge slightly to let air in (don’t gouge the plastic neck).
• Pull the hose off and aim it into the drain pan.

Step 6: Remove the lower radiator hose (if replacing)

• Locate the lower hose at the bottom of the radiator area.
• For spring clamps: use hose clamp pliers (specialty) and slide the clamp back.
• If your lower hose uses a quick-connect fitting: release the lock clip (design varies) using a pick tool (small hook pick), then pull the connector straight off.
• Keep the hose aimed into the drain pan as it comes free.

Step 7: Transfer clamps and compare parts

• Move reusable clamps onto the new hose (or install new clamps).
• Compare the new hose to the old hose (length, bends, ends) before installing.

Step 8: Install the new hose(s)

• Push the hose fully onto the radiator/engine fitting until it bottoms out.
• Position the clamp behind the raised “bead” on the fitting (this bead keeps the hose from slipping off).
• For spring clamps: use hose clamp pliers (specialty) to set the clamp in the same position as factory.
• For worm-gear clamps: tighten using a flathead screwdriver until snug; do not overtighten (you can crack plastic fittings).
• If quick-connect: push on until you feel/ hear a positive click, then confirm the lock clip is fully seated.

Step 9: Reinstall splash shield

• Reinstall using the trim clip remover and flathead screwdriver as needed.

Step 10: Refill coolant

• Lower the van off the jack stands (rated 3-ton minimum) using the floor jack (rated 3-ton minimum).
• Fill the reservoir using a coolant funnel with spill stopper with OAT engine coolant (Mopar compatible, 50/50 premix).
• On the 3.6L, there is typically an air-bleed screw near the thermostat housing area; if present, open it with an 8mm socket just enough to vent air, then close once a steady coolant stream (no bubbles) appears. Only crack it loose—don’t force it.

Step 11: Warm up and bleed remaining air

• Start the engine and let it idle.
• Set HVAC to full heat and medium fan.
• Watch the coolant level and top off as it drops (use the coolant funnel with spill stopper).
• Once the engine reaches operating temperature and you have hot cabin heat, shut the engine off and let it cool completely.
• Recheck the reservoir level and add coolant to the proper mark.

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✅ After Repair

• Inspect for leaks at every hose end with the engine idling and again after a test drive.
• Verify the heater blows hot and the temperature gauge stays normal.
• After the next full cool-down (later the same day or next morning), recheck coolant level and top off if needed.
• If you see repeated bubbling/low coolant, stop driving and recheck clamp position and hose seating.

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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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🎯 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.