🔧 Tundra - Timing Belt Replacement

Your Tundra’s 5.7L V8 does not use a timing belt. It uses a timing chain, which normally isn’t replaced on a schedule like a timing belt.

Most people asking for a “timing belt” on your Tundra actually mean the serpentine drive belt (the belt that runs the alternator, A/C, and power steering). If that’s what you meant, the steps below are for that belt.

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

---

⚠️ Safety & Precautions

• 🧤 Keep hands clear of the radiator fan and pulleys; never work with the engine running.
• 🧯 Let the engine cool so you don’t burn yourself on the radiator or hoses.
• 🔌 Battery disconnect is not required, but remove the key and keep it away from the truck.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Work gloves
• Safety glasses
• Flashlight
• Serpentine belt tool
• 14mm socket
• 3/8" drive ratchet
• 6" extension (3/8" drive)
• Trim clip remover

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine drive belt - Qty: 1

---

📋 Before You Begin

• 🅿️ Park on level ground, shift to Park, and set the parking brake.
• 📸 Take a photo of the belt routing sticker under the hood (or sketch the routing) before removing the belt.
• 🔎 Quick check: if you hear a cold-start rattle near the front of the engine for a few seconds, tell me—that’s more “timing chain” related than belt related.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm you’re replacing the correct belt

• Use a flashlight and look at the front of the engine.
• The belt you can see from the front is the serpentine drive belt (external belt). Your Tundra does not have an external “timing belt.”

Step 2: Remove any covers blocking access (if equipped)

• If a plastic shroud/cover is in the way, release clips using a trim clip remover.
• Set clips aside so they don’t fall into the engine bay.

Step 3: Relieve belt tension

• Install a 14mm socket on a 3/8" drive ratchet with a 6" extension (3/8" drive).
• Place the socket on the belt tensioner pulley arm bolt head.
• Rotate the tensioner to release tension while keeping your fingers away from pinch points.
• Move slowly; the spring is strong.

Step 4: Remove the old belt

• While holding the tensioner released with the 3/8" drive ratchet, slip the belt off one smooth pulley first.
• Carefully let the tensioner return to rest (don’t let it snap back).
• Remove the belt from the remaining pulleys by hand.

Step 5: Route the new belt

• Compare the new serpentine drive belt to the old one for length and rib count.
• Route the belt around the pulleys following the under-hood routing diagram.
• Make sure the belt ribs sit fully in the ribbed pulleys (no ribs hanging off an edge).

Step 6: Re-apply tension and seat the belt

• Use the 14mm socket and 3/8" drive ratchet to rotate the tensioner again.
• Slip the belt onto the last pulley, then slowly release the tensioner.
• Double-check every pulley: the belt must be centered and fully seated.

Step 7: Reinstall any covers

• Reinstall clips using the trim clip remover as needed to align and press them in.
• Do a final visual check with the flashlight for tools left behind.

---

✅ After Repair

• 🔍 Start the engine and watch the belt for 10-15 seconds. It should run smoothly with no wobble.
• 👂 Listen for squeal/chirp. If you hear noise, shut it off and re-check belt alignment on every pulley.
• 🧪 If the old belt was cracking or glazing, also inspect the tensioner and idler pulleys for rough bearings (spinning noise or gritty feel).

---

💰 DIY vs Shop Cost

Shop Cost: $150-$300 (parts + labor)

DIY Cost: $35-$90 (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 0.5-1.0 hours.

---

🎯 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.

---

Two quick questions so I can point you exactly right:

• ❓ Did you mean the serpentine drive belt (squealing/cracking belt up front), or are you chasing a timing chain symptom (cold-start rattle, cam/crank correlation codes)?
• ❓ What symptom made you want to replace it (noise, maintenance, check engine light, belt looks cracked)?