🔧 Serpentine Belt - Replacement

Your Tundra’s serpentine belt drives the alternator, water pump, power steering, and A/C compressor. Replacing it is straightforward, but the belt tension is strong, so work slowly and keep your fingers clear of the pulleys.

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

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⚠️ Safety & Precautions

• Engine must be off and fully cool before starting.
• Keep hands, hair, and clothing away from the belt path and pulleys.
• Do not crank the engine with the belt removed.
• If the belt is cracked, glazed, or frayed, inspect the tensioner and pulleys too.
• Battery disconnect is not required for this job.

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🔧 Required Tools

You'll need the following tools for this repair:

• 14mm socket
• 1/2-inch drive ratchet
• Long-handled breaker bar
• Flashlight
• Safety glasses
• Mechanic gloves

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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 completely.
• Open the hood and look at the belt routing diagram. It is usually on the radiator support or under the hood.
• Take a quick photo first.

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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 serpentine belt routing diagram under the hood.
• If the diagram is missing, take a clear photo of the existing belt path before removal.

Step 2: Release belt tension

• Find the belt tensioner at the front of the engine.
• Use a 14mm socket and 1/2-inch drive ratchet or breaker bar on the tensioner hex to rotate it and relieve belt tension.
• Move slowly to avoid slipping.

Step 3: Remove the old belt

• While holding tension off the belt, slip the belt off one easy-to-reach pulley.
• Slowly release the tensioner after the belt is free.
• Remove the belt from the remaining pulleys and lift it out.

Step 4: Inspect the pulleys

• Spin each accessible pulley by hand.
• Replace any pulley that feels rough, wobbles, or makes noise.
• Check the tensioner arm for smooth movement.

Step 5: Route the new belt

• Compare the new belt to the old one to make sure it matches length and rib count.
• Route the new belt around all pulleys except the easiest final pulley to access.
• Keep the belt ribs seated in every pulley groove.
• Double-check the routing before tensioning.

Step 6: Install the belt on the final pulley

• Use the 14mm socket and ratchet or breaker bar to rotate the tensioner again.
• Slip the belt onto the last pulley while the tension is released.
• Slowly let the tensioner return to its resting position.

Step 7: Verify alignment

• Check every pulley to make sure the belt is fully seated in the grooves.
• Make sure the belt is not twisted anywhere.
• No fastener torque is required for belt installation.

Step 8: Start and inspect

• Start the engine and watch the belt for smooth tracking.
• Listen for squealing, chirping, or rubbing.
• Shut the engine off immediately if the belt walks off a pulley.

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✅ After Repair

• Recheck belt tracking after a short idle period.
• Look for any wobble or noise from the tensioner and idlers.
• Reinspect the belt after a short test drive.

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💰 DIY vs Shop Cost

Shop Cost: $180-$320 (parts + labor)

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

You Save: $145-$240 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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