🔧 Serpentine Belt - Replacement

The serpentine belt drives the alternator, A/C compressor, and other accessories. If it’s cracked, glazed, squealing, or frayed, replace it before it fails and leaves you stranded.

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

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⚠️ Safety & Precautions

• Work with the engine off and completely cool.
• Keep fingers, clothing, and tools away from the belt path while releasing tension.
• Do not start the engine with the belt removed.
• No battery disconnect is required for this repair.
• If your Outback has a belt routing label under the hood, use it as the final reference before installation.

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🔧 Required Tools

You'll need the following tools for this repair:

• 3/8-inch drive ratchet
• 14mm socket
• Breaker bar
• Flashlight
• Gloves
• Safety glasses
• Fender cover

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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.
• Open the hood and let the engine cool fully.
• Take a quick photo of the belt routing before removal.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Locate the belt tensioner

• Open the hood and find the serpentine belt on the front of the engine.
• Look for the automatic tensioner pulley near the belt path.
• Take a photo before touching anything.

Step 2: Release belt tension

• Use a 14mm socket with a breaker bar or 3/8-inch drive ratchet on the tensioner.
• Rotate the tensioner in the direction that loosens the belt.
• Hold steady and slip the belt off one easy pulley with your other hand.
• There is no torque spec for this step because no fasteners are removed.

Step 3: Remove the old belt

• Slowly release the tensioner and remove the belt from all pulleys.
• Inspect the belt path for dirt, oil, or damaged pulleys.
• If a pulley feels rough or wobbly by hand, do not reuse it without repair.

Step 4: Route the new belt

• Compare the new belt to the old one to confirm length.
• Route the new belt around all pulleys except one easy-to-reach pulley near the tensioner.
• Use the routing label under the hood if it is present.
• Keep the belt fully seated in every pulley groove.

Step 5: Install the belt on the last pulley

• Use the 14mm socket and breaker bar to move the tensioner again.
• Slide the belt onto the last pulley while holding tension off the belt.
• Slowly release the tensioner and verify the belt is centered on every pulley.
• There is no torque spec for this step because no fasteners are removed.

Step 6: Final inspection

• Inspect every pulley groove visually.
• Make sure the belt ribs are not riding on the edges.
• Check that the belt is not twisted anywhere in the loop.

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✅ After Repair

• Start the engine and listen for squealing, chirping, or slapping noises.
• Watch the belt for 30-60 seconds to confirm it runs true.
• Turn the A/C on and off to confirm normal accessory operation.
• If noise remains, recheck belt routing and pulley alignment.

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💰 DIY vs Shop Cost

Shop Cost: $180-$350 (parts + labor)

DIY Cost: $35-$80 (parts only)

You Save: $145-$270 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-2 hours.

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🎯 Ready to get started?

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