🔧 Serpentine Belt - Replacement

The serpentine belt drives key engine accessories like the alternator, water pump, and A/C compressor. On your Ram, replacement is straightforward, but belt routing must be correct and the tensioner must be released carefully so the new belt seats properly.

Difficulty Level: Beginner | Estimated Time: 0.5-1 hour

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⚠️ Safety & Precautions

• Work with the engine completely off and cool.
• Keep hands, tools, and clothing clear of the fan and pulleys.
• Do not start the engine until the belt is fully seated on every pulley.
• No battery disconnect is required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• 3/8-inch drive ratchet
• 15mm socket
• Breaker bar
• Belt tensioner tool (specialty) - a tool that makes it easier to rotate the tensioner
• Flashlight
• Gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool fully before working near the belt path.
• Open the hood and locate the belt routing diagram on the radiator support or underside of the hood.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the belt routing

• Use a flashlight to find the belt routing diagram.
• Study the path before removing the old belt.
• Take a photo for backup.

Step 2: Release belt tension

• Use a 3/8-inch drive ratchet, 15mm socket, or breaker bar on the belt tensioner.
• Rotate the tensioner in the direction that relieves belt tension.
• Slowly hold the tensioner back and slip the belt off one smooth pulley.
• Move slowly to avoid snapping back.

Step 3: Remove the old belt

• Use your hands to pull the belt off the remaining pulleys.
• Inspect the belt path for cracks, oil contamination, or missing ribs.
• If you see heavy oil on the belt path, fix the leak first.

Step 4: Route the new belt

• Compare the new belt to the old belt to make sure the length matches.
• Route the new belt around the pulleys except for the easiest final pulley to access.
• Keep the belt fully seated in each pulley groove as you go.
• Double-check every groove.

Step 5: Install the belt on the tensioner

• Use the 3/8-inch drive ratchet, 15mm socket, or breaker bar to release the tensioner again.
• Slip the belt onto the last pulley slowly.
• Let the tensioner return fully and confirm the belt is seated.

Step 6: Verify belt alignment

• Inspect every pulley from top to bottom.
• Make sure the belt ribs are centered in the pulley grooves.
• No torque spec applies for belt installation itself.

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✅ After Repair

• Start the engine and watch the belt for 30 to 60 seconds.
• Listen for squealing, chirping, or slapping noises.
• Shut the engine off and recheck belt seating if anything looks off.
• Recheck after a short test drive.

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💰 DIY vs Shop Cost

Shop Cost: $160-$300 (parts + labor)

DIY Cost: $30-$80 (parts only)

You Save: $130-$220 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1 hour.

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🎯 Ready to get started?

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