🔧 Tacoma - Accessory Drive Belt Replacement (No Timing Belt)

Your Tacoma’s 4.0L V6 uses a timing chain, not a timing belt—so there is no timing belt to replace on a maintenance schedule. Most people asking this are actually needing the accessory drive belt (the belt that runs the alternator, A/C, and power steering).

Difficulty Level: Beginner | Estimated Time: 0.5-1.0 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a cold engine; belts/pulleys get very hot.
• ⚠️ Keep fingers/hair/clothing away from pulleys and the fan.
• ⚠️ Do not start the engine with hands near the belt area.
• 🔋 Battery disconnect is not required, but remove the key and keep it in your pocket.

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🔧 Required Tools

You'll need the following tools for this repair:

• 14mm socket
• 3/8" drive ratchet
• 3/8" drive breaker bar
• Flashlight
• Trim clip removal tool
• Mechanic gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Accessory drive belt (serpentine belt) - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Open the hood and locate the belt routing diagram (usually on the radiator support or underside of the hood).
• If the diagram is missing, take a clear photo of the belt routing before removal.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Get access and identify the tensioner

• Use a flashlight to locate the belt tensioner (spring-loaded pulley assembly that keeps the belt tight).
• If a plastic upper cover blocks access, remove clips using a trim clip removal tool.

Step 2: Relieve belt tension

• Place a 14mm socket on the tensioner’s hex boss/bolt head.
• Use a 3/8" breaker bar to rotate the tensioner and relieve tension.
• Tip: Move it slowly—spring tension is strong.

Step 3: Remove the old belt

• While holding the tensioner rotated with the breaker bar, slide the belt off the easiest-to-reach pulley.
• Slowly release the tensioner back to rest.
• Remove the belt from the remaining pulleys by hand.

Step 4: Inspect pulleys and tensioner

• Spin each pulley by hand (no tools). They should feel smooth and quiet.
• If you feel grinding, wobble, or hear noise, stop and tell me which pulley feels bad.

Step 5: Install the new belt

• Route the new belt following the under-hood diagram (use your photo if needed).
• Make sure the belt ribs sit fully in the grooved pulleys.
• Leave the easiest pulley for last (usually a smooth idler pulley).

Step 6: Apply tension and seat the belt

• Use the 14mm socket and 3/8" breaker bar to rotate the tensioner again.
• Slip the belt onto the last pulley, then slowly release the tensioner.
• Double-check belt alignment on every pulley with the flashlight.

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✅ After Repair

• Start the engine and watch the belt for 15-30 seconds; it should run smoothly with no wandering.
• Listen for squeal or chirping. If you hear noise, shut it off and re-check belt seating.
• Reinstall any covers/clips you removed.

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💰 DIY vs Shop Cost

Shop Cost: $120-$220 (parts + labor)

DIY Cost: $25-$60 (parts only)

You Save: $60-$160 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.

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Quick check: Did you mean the accessory drive belt, or are you actually trying to fix a timing chain issue (rattle on cold start, check engine light, metal noise)?