🔧 Patriot - Radiator Hose Replacement

Replacing a radiator hose stops coolant leaks and prevents overheating. On your Patriot, the job is mainly removing the old hose at the radiator and engine, then refilling and bleeding the cooling system so no air pockets remain.

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 cause burns.
• ⚠️ Support the vehicle with jack stands if you lift it; never rely on a floor jack alone.
• ⚠️ Keep coolant off belts and electrical connectors; wipe spills immediately.
• ⚠️ Coolant is toxic—use a drain pan and dispose of it properly.
• 🔋 Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• Drain pan (at least 10-quart)
• Hose clamp pliers (specialty)
• Slip-joint pliers
• Pick tool
• Flat-blade screwdriver
• 8mm socket
• 10mm socket
• 1/4" drive ratchet
• 3" extension (1/4" drive)
• Trim clip tool
• Funnel
• 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
• Radiator hose clamps - Qty: 2
• Engine coolant (OAT, MS.90032 compatible) - Qty: 2 gallons
• Distilled water - Qty: 1 gallon

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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 2+ hours).
• Set the HVAC to HEAT and the fan to LOW for the later bleed step.
• Assumption: You want to replace either the upper or lower radiator hose; steps below cover both.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve any residual pressure

• With the engine cold, place shop towels around the coolant reservoir cap.
• Slowly loosen the cap to the first stop to vent pressure, then remove it fully by hand.

Step 2: Raise the front (if needed for access)

• Lift the front using a floor jack (rated 2-ton minimum).
• Set the vehicle onto jack stands (rated 2-ton minimum) at the proper lift points.

Step 3: Drain coolant to below hose level

• Place a drain pan (at least 10-quart) under the radiator area.
• If your Patriot has a radiator drain cock you can access, open it using a flat-blade screwdriver and drain until the level is below the hose you’re replacing.
• If the drain cock isn’t accessible, carefully loosen the lower radiator hose clamp using hose clamp pliers (specialty) and let coolant drain into the pan.
• Hose clamp pliers are pliers that lock and squeeze spring clamps safely.

Step 4: Remove air intake pieces if they block access

• If the upper hose area is tight, loosen intake tube/air box fasteners using a 8mm socket or 10mm socket with a 1/4" drive ratchet.
• Release any plastic push-clips using a trim clip tool.
• Move the intake parts aside without yanking on sensor wiring.

Step 5: Remove the old hose (upper hose procedure)

• At the radiator end, compress and slide the clamp back using hose clamp pliers (specialty).
• At the engine end, do the same with hose clamp pliers (specialty).
• Twist the hose to break it free using slip-joint pliers (gentle squeezing), then pull it off by hand.
• If it’s stuck, carefully work the seal loose with a pick tool between the hose and fitting (do not gouge the metal/plastic neck).

Step 6: Remove the old hose (lower hose procedure)

• Position the drain pan (at least 10-quart) under the lower hose because more coolant will spill.
• Compress and slide the clamp(s) back using hose clamp pliers (specialty).
• Twist the hose to break it free using slip-joint pliers, then remove it by hand.
• Use a pick tool only if needed to release the hose from the fitting.

Step 7: Inspect and clean the hose connection necks

• Wipe the radiator and engine hose necks with shop towels.
• Make sure no old rubber is stuck on the necks. Use a pick tool carefully if needed.
• Clean sealing surfaces prevent repeat leaks.

Step 8: Install the new hose and clamps

• Slide new clamps onto the new hose by hand.
• Push the new hose fully onto the radiator neck and the engine neck (it should seat past the bead/stop).
• Position clamps behind the bead on each neck using hose clamp pliers (specialty).
• If using worm-gear clamps (screw type), tighten with a flat-blade screwdriver until snug—do not crush the plastic neck.

Step 9: Reinstall anything removed for access

• Reinstall the intake/air box pieces using a 8mm socket or 10mm socket with a 1/4" drive ratchet and 3" extension (1/4" drive).
• Reinstall any clips with a trim clip tool.

Step 10: Refill coolant

• Mix coolant to a 50/50 ratio unless you bought pre-mixed: use engine coolant (OAT, MS.90032 compatible) and distilled water.
• Refill at the coolant reservoir using a funnel until it reaches the “FULL COLD” mark.

Step 11: Bleed air from the cooling system

• Leave the reservoir cap off.
• Start the engine and let it idle. Keep the heater set to HEAT, fan LOW.
• As the engine warms, add coolant as the level drops using a funnel.
• Carefully squeeze the upper radiator hose by hand (wear nitrile gloves) to help purge air.
• When the radiator hose gets hot (thermostat opened) and the heater blows hot, install the cap by hand.

Step 12: Final leak check

• Inspect both hose ends with safety glasses on while the engine runs.
• Shut off the engine and check for drips under the radiator area.

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✅ After Repair

• After a full cool-down, recheck the reservoir level and top off to the “FULL COLD” line using a funnel.
• Test drive 10–15 minutes, then recheck for leaks around both hose ends.
• If the temperature gauge rises abnormally or the cabin heater goes cold, shut down and let it cool—air may still be trapped.

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💰 DIY vs Shop Cost

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

DIY Cost: $45-$140 (parts only)

You Save: $105-$455 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.