🔧 1500 - Radiator Hose Replacement

Replacing a radiator hose stops coolant leaks and prevents overheating. The job is mostly about safely draining some coolant, swapping the hose, and refilling/bleeding the cooling system so no air pockets remain.

Difficulty Level: Intermediate | Estimated Time: 1.0-2.5 hours

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⚠️ Safety & Precautions

• ⚠️ Only work on a fully cold engine; hot coolant can spray and burn.
• ⚠️ Never open the coolant cap when hot; pressure can release suddenly.
• ⚠️ Support the truck with jack stands if you lift it—never rely on a jack alone.
• ⚠️ Keep coolant off belts and pulleys; it can cause slipping.
• ⚠️ Clean spills immediately; coolant is toxic to people and pets.

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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 3 gallons)
• Funnel with long neck
• Pliers
• Hose clamp pliers (specialty)
• Flat-blade screwdriver
• 8mm socket
• 10mm socket
• 1/4" ratchet
• 3" extension
• Trim clip removal tool
• Pick tool (hose pick) (specialty)
• Shop towels
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Radiator hose (upper or lower, as applicable) - Qty: 1
• Hose clamps - Qty: 2
• Engine coolant (Mopar OAT 50/50 premix or OAT concentrate + distilled water) - Qty: 1-2 gallons
• Distilled water - Qty: 1-2 gallons (if using concentrate)
• Coolant cap - Qty: 1 (optional, if old cap is weak)

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Let the engine cool completely (best: sit overnight).
• Place wheel chocks behind the rear tires.
• Put a drain pan under the radiator area before loosening anything.
• Tip: Take a photo of hose routing first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Assumption: This covers the main radiator hose (upper or lower) with common spring-style clamps; steps note the alternate screw-style clamp method.

Step 1: Remove pressure from the cooling system (cold engine)

• Use your hand to slowly loosen the coolant reservoir cap (degas bottle cap) until any tiny hiss stops, then remove it completely.
• Set the cap somewhere clean.

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

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

Step 3: Drain enough coolant so the hose won’t dump everywhere

• Slide the drain pan (at least 3 gallons) under the radiator lower area.
• If equipped with a radiator drain (petcock), open it carefully using pliers as needed and drain 1-2 gallons.
• If there’s no easy drain, you can skip the petcock and be ready for a spill when the lower hose comes off (keep the drain pan positioned).

Step 4: Clear access to the hose

• Use a 10mm socket, 1/4" ratchet, and 3" extension to remove any intake/airbox fasteners that block access (if applicable).
• Use a trim clip removal tool to pop any plastic push-clips holding a shroud/cover (if applicable).
• Use a flashlight to confirm which hose you’re replacing:
  • Upper hose: from top of radiator to engine.
  • Lower hose: from bottom of radiator to engine.

Step 5: Loosen the hose clamps

• If you have spring clamps (most common), squeeze the clamp tabs using hose clamp pliers (specialty) and slide the clamp back on the hose about 2 inches.
• If you have screw-style clamps, loosen them using a flat-blade screwdriver until the hose can move.
• Tip: Position clamps so you can reach them later.

Step 6: Break the hose free

• Twist the hose by hand to break the seal at the radiator neck and the engine fitting.
• If it’s stuck, slide a pick tool (hose pick) (specialty) under the hose end to gently separate it from the fitting (do not gouge the plastic radiator neck).
• Pull the hose off slowly while keeping the drain pan positioned to catch coolant.

Step 7: Prep the fittings and compare parts

• Use shop towels to wipe the radiator neck and engine fitting clean.
• Inspect for cracks, pitting, or broken necks. If a radiator neck is damaged, don’t install the new hose—coolant leaks will continue.
• Hold the new hose next to the old one and confirm the same shape, length, and end diameters.

Step 8: Install the new hose and clamps

• Slide the new clamps onto the hose first (use pliers if needed).
• Push the hose fully onto the radiator neck and engine fitting until it bottoms out.
• Position the clamps behind the raised bead on each fitting.
• For spring clamps, use hose clamp pliers (specialty) to move them into place.
• For screw clamps, tighten using a flat-blade screwdriver until snug (do not crush the hose).

Step 9: Reinstall any removed intake/shrouds

• Reinstall components using a 10mm socket, 1/4" ratchet, and 3" extension.
• If any small bolts were removed, snug them evenly (plastic parts crack if overtightened).

Step 10: Refill coolant

• Use a funnel with long neck to fill the coolant reservoir with Engine coolant (Mopar OAT 50/50 premix) to the MAX line (cold).
• If using concentrate, mix with distilled water to make a 50/50 mix before filling.

Step 11: Bleed air from the system

• Start the engine and let it idle with the cap off for a few minutes while watching the coolant level (use a flashlight).
• Set the HVAC to HOT and fan to LOW to help move coolant through the heater core.
• If your cooling system has a bleeder screw near the thermostat housing, crack it open slightly using an 8mm socket just until air spits out, then close it once a steady coolant stream appears.
• Top off coolant as the level drops. Do not let it run empty.
• Reinstall the reservoir cap once bubbles reduce and the level stabilizes.
• Tip: Keep hands away from the fan area.

Step 12: Lower the truck and final top-off

• Shut the engine off and let it cool.
• Use the floor jack (rated 3-ton minimum) to lift slightly, remove jack stands (rated 3-ton minimum), and lower to the ground.
• Recheck coolant level cold and add as needed using the funnel with long neck.

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✅ After Repair

• Check for leaks at both hose ends with the engine idling and fully warmed up.
• Watch the temperature gauge on a short test drive; it should stay normal.
• After the first heat-cycle (drive, then fully cool), recheck the coolant level and top off to the MAX (cold) line.
• If you smell coolant or see drips, re-seat the hose and reposition/tighten the clamps.

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💰 DIY vs Shop Cost

Shop Cost: $250-$550 (parts + labor)

DIY Cost: $40-$140 (parts only)

You Save: $110-$510 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?

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