🔧 Veloster - Serpentine Belt Replacement

The serpentine belt (also called the drive belt) is the single belt that spins your alternator and A/C compressor. Replacing it restores proper grip and prevents squealing, charging issues, or a belt failure that can leave you stranded.

Difficulty Level: Intermediate | Estimated Time: 0.8-1.5 hours

Assumption: factory belt-routing diagram is present under-hood.

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⚠️ Safety & Precautions

• ⚠️ Work on a cool engine; keep hands away from hot parts.
• ⚠️ Support the car with jack stands; never rely on a floor jack alone.
• ⚠️ Keep fingers clear of the tensioner; it is spring-loaded and can snap back hard.
• ⚠️ Key out of ignition; do not start the engine while hands are near the belt.
• ⚠️ Battery disconnect is not required, but avoid shorting tools on the alternator.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• 21mm socket
• 3/8" drive ratchet
• 3/8" drive breaker bar
• 14mm box wrench
• 10mm socket
• Trim clip removal tool
• Torque wrench (20-150 ft-lb range)
• Flashlight
• Mechanic gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt (accessory drive belt) - Qty: 1

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📋 Before You Begin

• Park on level ground, put the transmission in 1st gear, and set the parking brake.
• Chock a rear wheel using wheel chocks.
• Pop the hood and locate the belt routing diagram (usually on the radiator support/underside of hood).
• Take a clear photo of the existing belt routing with your phone for backup.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift the front-right corner safely

• Use wheel chocks at the rear wheel.
• Use a 21mm socket and 3/8" drive breaker bar to loosen the front-right lug nuts about 1 turn (do not remove yet).
• Use a floor jack to lift at the front-right jack point.
• Place jack stands under a solid support point and lower the car onto the stands.
• Remove the wheel using a 21mm socket.

Step 2: Remove the splash shield for belt access

• Use a trim clip removal tool to pop out the plastic clips.
• Use a 10mm socket and 3/8" drive ratchet to remove any small bolts/screws holding the lower splash shield/inner liner.
• Pull the shield/liner back to expose the belt and the belt tensioner.
• Tip: lay clips in a cup.

Step 3: Relieve belt tension (automatic tensioner)

• Find the belt tensioner (a spring-loaded arm with a smooth pulley).
• Put a 14mm box wrench on the tensioner pulley bolt head.
• Slowly rotate the tensioner to relieve belt tension (spring pressure will increase as you rotate).
• While holding the tensioner rotated, slip the belt off one easy-to-reach pulley (usually the alternator or an idler pulley).
• Carefully let the tensioner return to its resting position (do not let it snap back).
• Tip: keep your knuckles clear.

Step 4: Remove the old belt and compare lengths

• Pull the belt out from around the remaining pulleys by hand.
• Lay the old belt next to the new belt and compare overall length and rib count.
• If the old belt is shredded, use a flashlight to check for rubber strands wrapped around pulleys.

Step 5: Route the new belt correctly

• Follow the under-hood routing diagram (or your photo) to loop the belt around each pulley.
• Make sure the belt ribs sit fully in the grooved pulleys, and the smooth side rides on smooth pulleys.
• Leave the easiest pulley for last (the one you can slip on/off with the tensioner released).
• Tip: one rib off will squeal.

Step 6: Re-apply tension and seat the belt

• Use a 14mm box wrench to rotate the tensioner again.
• Slide the belt onto the final pulley, then slowly release the tensioner.
• Use a flashlight to inspect every pulley: the belt must be centered and fully seated in the grooves.

Step 7: Reinstall splash shield and wheel

• Reposition the splash shield/liner and reinstall fasteners using a 10mm socket and 3/8" drive ratchet.
• Reinstall plastic clips using a trim clip removal tool (press pins in until fully seated).
• Reinstall the wheel and snug the lug nuts using a 21mm socket.
• Lower the car using a floor jack, remove jack stands, and set it back on the ground.
• Tighten lug nuts in a star pattern using a torque wrench: Torque to 90-110 Nm (66-81 ft-lbs).

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✅ After Repair

• Start the engine and watch the belt for 20-30 seconds; it should run smooth with no wandering.
• Turn A/C on and headlights on; listen for squeal or chirp.
• Shut the engine off and re-check belt seating with a flashlight.
• If there is any squeal, recheck routing and that the ribs are fully in every groove.

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💰 DIY vs Shop Cost

Shop Cost: $140-$280 (parts + labor)

DIY Cost: $25-$70 (parts only)

You Save: $115-$210 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.7-1.2 hours.

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🎯 Ready to get started?

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