TOYOTA 90080-10089 Upper Timing Belt Cover Bolts 4
fits model: T100, Tacoma, Tundra, 4runner. make: Toyota. year: 1996–2004.
( Manufacturer Part Number: 90080-10089 ), ( Item Diameter: 10mm ), ( Items Included: Bolts ), ( Item Length: 1.0 ), ( Vintage Part: No ), ( Placement On Vehicle: Front, Rear ), ( Transmission Type: Manual ), ( Type: Belt Cover ), ( Manufacturer Warranty: 1 Month ), ( Country Of Origin: Japan )
Review TOYOTA Truck Upper Timing Belt Cover Bolts fits TACOMA TUNDRA 4RUNNER T100 1996–2004
The **Toyota 90080-10089 Upper Timing Belt Cover Bolt Set** is a precision-engineered, high-quality replacement part designed exclusively for Toyota s 4.7L V8 engines found in select models from 1996 to 2004, including the **Tacoma (T100), 4Runner, and Tundra** (pre-2004). These bolts are critical components of the upper timing belt cover assembly, ensuring proper alignment, sealing, and structural integrity of the timing system a vital area that directly impacts engine performance, longevity, and reliability. Crafted from **high-strength, heat-treated steel**, these bolts are engineered to withstand the demanding conditions of Toyota s high-performance V8 engines, which operate under significant torque and thermal stress. Each bolt is **OEM-specified**, meaning they meet Toyota s exact dimensional and material standards, guaranteeing a seamless fit with the factory timing belt cover, gaskets, and mounting points. The set includes all necessary bolts typically featuring **fine-threaded, hex-head designs** that secure the upper cover in place, preventing leaks, misalignment, or cover warping, which could lead to catastrophic timing belt failure or oil contamination. Beyond their functional role, these bolts also play a key role in maintaining proper engine timing, which is essential for optimal fuel efficiency, power delivery, and overall engine health. Whether you're performing a **timing belt replacement, cover refresh, or routine maintenance**, this bolt set ensures a professional-grade installation, reducing the risk of leaks, rattles, or premature wear. Ideal for mechanics, DIY enthusiasts, and fleet managers working on these iconic Toyota trucks, this part is a must-have for anyone seeking **durability, compatibility, and peace of mind** in their engine rebuild or service project.
### **Pros and Cons of Buying Toyota 90080-10089 (1996-2004 Tacoma, 4Runner, T100, Tundra) Upper Timing Belt Cover Bolts**
#### **Pros:**1. **Direct Fitment** These bolts are designed specifically for the 2002 2004 4.7L V8 engines (Tacoma, 4Runner, Tundra) and the 1996 2004 4.0L V6 engines (T100, early 4Runner/Tacoma). They replace the stock bolts, which are known to stretch or break over time, leading to timing belt cover leaks or misalignment.
2. **Prevents Leaks and Misalignment** The stock bolts are often too soft and can stretch, causing the timing belt cover to warp or leak oil. These aftermarket bolts are made from stronger materials (typically 7075-T6 aluminum or steel) and are torqued to the correct specification, ensuring a secure seal.
3. **Easy Installation** They come pre-packed and are straightforward to install, requiring no special tools beyond a socket set and torque wrench. No machining or modification is needed.
4. **Cost-Effective Solution** Compared to a full timing belt cover replacement (which may require machining or a new cover), these bolts are a budget-friendly fix for a common issue.
5. **Widely Available** These bolts are sold by multiple reputable brands (e.g., ECS, JEGS, RockAuto) and are easy to find online or at auto parts stores.
6. **Prevents Further Damage** If the timing belt cover is leaking, oil can contaminate the timing belt, leading to premature failure. Replacing the bolts stops this issue before it escalates.
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#### **Cons:**1. **Not a Permanent Fix for a Warped Cover** If the timing belt cover itself is already warped or cracked, replacing just the bolts may not fully resolve the leak. In such cases, a new cover or machining may be necessary.
2. **Requires Proper Torquing** These bolts must be torqued to the correct specification (typically **10 12 ft-lbs** for aluminum bolts or **25 30 ft-lbs** for steel bolts) to avoid overtightening or loosening. Over-torquing can strip threads or damage the cover.
3. **Potential for Counterfeit Parts** Some aftermarket bolts may be low-quality or counterfeit, especially if purchased from untrusted sellers. Always buy from reputable brands or sellers with good reviews.
4. **Limited to Specific Applications** These bolts are **not** universal they are **only for the 2002 2004 4.7L V8 (Tacoma, 4Runner, Tundra) and 1996 2004 4.0L V6 (T100, early 4Runner/Tacoma)**. Mixing them with other engines can lead to improper fitment.
5. **May Still Require Additional Sealing** In some cases, even with new bolts, the gasket between the cover and engine may degrade. If oil continues to leak, the gasket may need replacement.
6. **Not a Long-Term Guarantee** While these bolts last much longer than stock ones, they are not indestructible. Under extreme conditions (high RPM, aggressive driving, or poor maintenance), they could still fail over time.
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### **Conclusion:**The **Toyota 90080-10089 upper timing belt cover bolts** are a **highly recommended and cost-effective solution** for preventing leaks and misalignment in the specified Toyota trucks. They are far superior to stock bolts and are widely trusted by mechanics and DIY enthusiasts. However, they are **not a universal fix** if the timing belt cover is already damaged, additional work may be needed.
If your vehicle is experiencing **oil leaks from the timing belt cover** or you re performing a **timing belt replacement**, these bolts are an essential upgrade. Always **torque them correctly** and **inspect the gasket** for wear. For best results, pair them with a **new timing belt cover gasket** if the old one is compromised.
### **Recommendation:**- **Buy from a reputable seller** (e.g., JEGS, RockAuto, Amazon with verified reviews).
- **Torque the bolts to specification** (check Toyota s service manual for exact specs).
- **Inspect the timing belt cover gasket** replace if cracked or degraded.
- **Consider a full timing belt cover replacement** if leaks persist after bolt installation.
- **Perform regular maintenance** to extend the life of the bolts and prevent future issues.
This upgrade is **worth the investment** for anyone dealing with timing belt cover leaks in these Toyota models.
Details:
96-04 Toyota Tacoma Truck 4Runner T100 Tundra Upper Timing Belt COVER BOLTS bolt, 0526 C36 Quantity 4.
part #: 9008010089 prices
- $14.40-$29.50
specifications universajoin:
- for models: T100, Tacoma, Tundra, 4runner
- for makes: Toyota
- for years: 1996-2004
- mpn: 90080-10089
- item diameter: 10mm
- items included: Bolts
- item length: 1.0
- vintage part: No
- placement on vehicle: Front, Rear
- transmission type: Manual
- type: Belt Cover
- manufacturer warranty: 1 Month
- country of origin: Japan
offer universajoin:
- sold: 0
- started: May 12, 2026
- quantity: 1
- options: Ship-to-home
- availability: In Stock
shipping universajoin:
- transit: 6-9 Days
- type: Fixed
- service: USPS Ground Advantage
- cost: $6.00
- carrier: USPS
- class: Standard
seller universajoin:
- city: Fremont, California
- rating: 100.0%
- # reviews: 1018
payments universajoin:
- money order
- credit card: Discover
- other
- wallet: Apple-pay
returns universajoin:
- policy: Returns Accepted
- paid by: Buyer
- time: 30 Days
general universajoin:
- condition: Used
- Transmission Drivetrain > Driveshafts Parts > Driveshafts
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