🔧 Outlander - Radiator Hose Replacement

Replacing a radiator hose stops coolant leaks and prevents overheating. On your Outlander, the job is mostly about safely draining some coolant, swapping the hose, then refilling and bleeding air out of the cooling system.

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

Assumption: You’re replacing either the upper or lower radiator hose; steps include both.

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⚠️ Safety & Precautions

• ⚠️ Never open the radiator cap on a hot engine; hot coolant can spray and burn.
• ⚠️ Support the Outlander with jack stands before going underneath; never rely on a floor jack alone.
• ⚠️ Coolant is toxic to people and pets; catch every drop and clean spills.
• ⚠️ Keep hands and tools away from the radiator fan area; it can turn on unexpectedly.
• 🔋 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 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Drain pan (at least 2-gallon)
• Funnel
• Hose clamp pliers
• Channel-lock pliers
• Pick tool (hook pick)
• Trim clip removal tool
• 10mm socket
• 3/8" drive ratchet
• 6" extension (3/8")
• Flathead screwdriver
• Shop towels
• 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
• Hose clamps - Qty: 2
• Mitsubishi Super Long Life Coolant (premixed) - 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 (best: sit overnight).
• Set the cabin heat to HOT before you start bleeding later; this helps purge air from the heater circuit.
• Raise the front with a floor jack and support with jack stands at proper lift points.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the lower engine cover (if equipped)

• Use a trim clip removal tool to pop out the plastic clips.
• Use a 10mm socket with a 3/8" drive ratchet and 6" extension (3/8") to remove any bolts.
• Set the cover and fasteners aside so you don’t lose them.

Step 2: Relieve pressure safely

• Place a shop towel over the radiator cap.
• Slowly loosen the cap by hand. If you hear hissing, stop and wait until it fully vents.

Step 3: Drain enough coolant to drop the level below the hose

• Slide a drain pan (at least 2-gallon) under the radiator.
• Open the radiator drain cock (small plastic drain valve) by hand if accessible; if tight, use a flathead screwdriver gently.
• Drain until coolant is below the hose you’re replacing (upper hose = usually a little; lower hose = typically more).
• Close the drain cock by hand when done. Do not overtighten plastic.

Step 4: Remove the old hose clamps

• If you have spring clamps (factory-style), squeeze the tabs with hose clamp pliers and slide the clamp back on the hose.
• If you have worm-gear clamps (screw type), loosen them with a flathead screwdriver.
• Take a photo before removal.

Step 5: Remove the radiator hose

• Twist the hose to break it free (use channel-lock pliers gently if needed).
• If it’s stuck, work a pick tool (hook pick) carefully between the hose and fitting to release it.
• Pull the hose off the radiator neck and the engine-side fitting.
• Wipe the fittings clean with shop towels.

Step 6: Install the new hose

• Slide the clamps onto the new hose first.
• Push the hose fully onto each fitting until it seats against the stop/bead.
• Position the clamps behind the raised bead on the fitting, then secure them:
  • Spring clamp: release using hose clamp pliers so it snaps tight.
  • Worm-gear clamp: tighten with a flathead screwdriver until snug (do not strip the clamp).
• Make sure the hose is not rubbing on sharp edges or the belt area.

Step 7: Refill coolant

• Insert a funnel into the radiator fill neck.
• Slowly add Mitsubishi Super Long Life Coolant (premixed) until the radiator is full.
• Fill the coolant reservoir to the FULL line.

Step 8: Bleed air from the cooling system

• Leave the radiator cap off for now.
• Start the engine and let it idle while watching the coolant level.
• As the engine warms up, the level may drop; add coolant using the funnel as needed.
• Turn the cabin heat to HOT and confirm you get warm air (this helps confirm coolant is flowing through the heater core).
• Carefully “burp” the system by gently squeezing the upper radiator hose with gloved hands to help push trapped air out.
• When you see fewer bubbles and the level stabilizes, install the radiator cap by hand.

Step 9: Reinstall the lower engine cover

• Reinstall bolts using a 10mm socket, 3/8" drive ratchet, and 6" extension (3/8").
• Reinstall clips using a trim clip removal tool to align, then press them in.

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✅ After Repair

• Start the engine and check for leaks at both ends of the hose with a work light.
• Let the engine reach normal operating temperature and verify the temperature gauge stays normal.
• Shut it off, let it cool fully, then recheck the radiator level and reservoir level; top off if needed using a funnel.
• Over the next 1-2 drives, recheck for seepage and recheck the reservoir level.

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💰 DIY vs Shop Cost

Shop Cost: $200-$450 (parts + labor)

DIY Cost: $40-$120 (parts only)

You Save: $160-$330 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-1.5 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.