A Guide to the Engine Timing Belt for the 2004-2009 Toyota 4Runner 4.7L V8
Everything V8 4Runner owners need to know about this critical maintenance job before buying a new aftermarket timing belt.
- This guide is ONLY for the 2004-2009 4Runner with the 4.7L V8 engine; the V6 has a timing chain.
- Replace the timing belt, water pump, tensioner, and idlers every 90,000 miles or 7-9 years, whichever comes first.
- Treat the 4.7L V8 as an interference engine; belt failure can cause catastrophic damage.
- For best results, use a complete kit from an OEM supplier like Aisin (TKT-021).
Is This For My 4Runner? V8 vs. V6 Engines
First, confirm your engine. This article is only for the 4.7L V8 engine used in the 2004-2009 4Runner, which has a timing belt. If you have the 4.0L V6, your engine has a timing chain that is designed to last the life of the vehicle and does not need routine replacement. You can find your engine size on the sticker under the hood or on your vehicle's original window sticker.
Symptoms of a Failing Timing Belt
A timing belt often fails without any warning. Unlike other parts that get noisy, a timing belt can be fine one moment and broken the next. However, there are some potential signs of a problem with the belt or its related components.
- Ticking Noise: A rhythmic ticking sound from the front of the engine could indicate 🎬 Watch this video to diagnose and fix common V8 ticking noises. a problem with the belt or the tensioner.
- Engine Won't Start: If the belt breaks, the engine will crank but will not start.
- Check Engine Light: A stretched or slipped belt can cause camshaft and crankshaft correlation errors, triggering codes like P0016 or P0017.
Is the 4.7L V8 an Interference Engine?
There is conflicting information online, with some sources calling the early (non-VVTi) 2UZ-FE a non-interference engine and later (VVTi) versions interference. An interference engine means that if the timing belt breaks, the pistons can collide with the open valves, causing catastrophic and expensive engine damage. Because of this severe risk, you should always treat it as an interference engine. Do not risk your engine's health by delaying replacement.
Choosing the Right Aftermarket Timing Belt Kit
When replacing the timing belt, it is critical to also replace the water pump, tensioner, and idler pulleys. Labor is the most expensive part of this job, so replacing these components at the same time saves you from having to pay for the same job twice. For this reason, you should always purchase a complete kit.
Tier 1: OEM Supplier Brands
- Aisin: This is the original equipment manufacturer for many of Toyota's parts. The Aisin TKT-021 kit is widely considered the best choice, providing OEM quality without the dealership price tag. These kits often include a timing belt made by Mitsuboshi.
- Mitsuboshi / Bando: Both are OEM suppliers to Toyota. If you buy a belt from one of these brands, you are getting a part that meets Toyota's original specifications.
Tier 2: High-Quality Aftermarket Brands
- Gates: Gates is a highly respected brand that produces quality timing belt kits. They are a reliable alternative to OEM and are trusted by many professional mechanics.
- Cloyes: While well-known for timing chains, Cloyes also offers timing belt kits that are considered good quality aftermarket replacements.
Tier 3: Budget-Conscious Brands
- Dayco: Dayco offers complete kits at a competitive price. While their belts are generally considered reliable, some owners have reported issues with the longevity of the tensioners and pulleys included in their kits.
Pro Tip: Given the critical nature of this part and the high cost of labor, it is strongly recommended to choose a Tier 1 kit from a brand like Aisin. The small amount of money saved on a budget kit is not worth the risk of premature failure of a pulley or tensioner.
Known Issues, Recalls, or TSBs
A search of the National Highway Traffic Safety Administration (NHTSA) database shows no recalls or technical service bulletins (TSBs) specifically for timing belt failure on the 2004-2009 Toyota 4Runner 4.7L V8. The primary maintenance requirement is replacing the belt at the recommended interval.
| Component/Service | Estimated Cost |
|---|---|
| Aftermarket Timing Belt Kit (with Water Pump) | $150 - $350 |
| Shop Labor | $800 - $1,500+ |
| Total Estimated Cost (Independent Shop) | $950 - $1,850+ |
Note: Costs are estimates and can vary significantly based on your location and the specific repair shop. Dealer pricing may be higher.
Frequently Asked Questions (FAQ)
When do I need to replace my 4Runner's timing belt?
Toyota recommends replacing the timing belt on the 4.7L V8 engine every 90,000 miles or every 7-9 years, whichever comes first. Rubber degrades over time, so even if your 4Runner has low mileage, the belt must be replaced if it is old.
Should I replace just the belt?
No. You should always replace the timing belt, water pump, tensioner, and idler pulleys at the same time using a complete kit. 🎬 Follow this step-by-step guide to replace your timing belt and water pump. The labor to access the belt is the most expensive part of the job, and a failure of an old pulley or water pump can destroy your new belt and potentially your engine.
Can I do this job myself?
This is an advanced DIY job. It requires specific tools, including a torque wrench and potentially a crank pulley holder, and meticulous attention to detail to ensure the engine timing is set correctly. An incorrectly installed timing belt can lead to severe engine damage. For most owners, this job is best left to a professional mechanic.
🎬 See what's involved in this advanced job with a detailed walkthrough.What's the difference between a timing belt and a serpentine belt?
The 4.7L V8 engine has both. The timing belt is internal, synchronizes the engine's camshafts and crankshaft, and is made of rubber. The serpentine belt is external and runs accessories like the alternator and power steering pump. They are separate parts with different maintenance schedules.
Helpful Videos
Technical Specifications
OEM Part Numbers: 13568-09070 13568-59095 13568-39016
Belt Teeth: 211, Belt Width: 34mm
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Toyota 4Runner: