LEXUS 1110159145 Cylinder Head

( Manufacturer Part Number: 1110159145 ), ( Conditions Options: One Single Head ), ( Items Included: Bolts ), ( Genuine Oem: Yes ), ( Material: Aluminum ), ( Vintage Part: No ), ( Type: Cylinder Head ), ( Year: 1995 ), ( Finish: Unfinished )

Review LEXUS Oem Cylinder Head fits LS400 1990–1997

The **Lexus 1110159145 cylinder head** for the **1990 1997 LS400** (based on the Toyota 1UZ-FE engine) is a meticulously engineered component designed to deliver exceptional performance, reliability, and durability in one of the most iconic luxury V8 powertrains ever produced. This cast aluminum cylinder head, forged from high-grade 319 aluminum alloy, features a sophisticated dual overhead camshaft (DOHC) design with four valves per cylinder (two intake and two exhaust), allowing for optimized airflow and enhanced combustion efficiency. The head incorporates precision-machined combustion chambers and a high-lift camshaft profile, enabling the LS400 s legendary 3.3-liter displacement to produce a smooth yet powerful output of up to **270 horsepower** (depending on the year and tuning modifications). The intake ports are generously sized to facilitate unrestricted airflow, while the exhaust ports are strategically contoured to maximize scavenging and reduce backpressure, contributing to the engine s signature deep, resonant exhaust note. This cylinder head also features **hydraulic valve lifters**, eliminating the need for frequent valve adjustment, and is equipped with **titanium valve springs** to prevent valve float at high RPMs, ensuring consistent performance across the entire rev range. Forged from a single casting, it is reinforced with **ribbed structural reinforcements** to maintain rigidity under high cylinder pressures, while the **intake and exhaust valve seats** are precision-hardened to withstand the extreme heat generated by high-performance applications. Whether used in stock form, as part of a restored classic, or in a heavily modified high-performance setup, this cylinder head remains a cornerstone of the LS400 s legendary reputation for smoothness, torque, and longevity. Its compatibility with aftermarket upgrades such as high-flow headers, larger valves, or performance camshafts further solidifies its status as a versatile and high-quality component for enthusiasts seeking to preserve or enhance the iconic character of this legendary engine.

**Pros and Cons of Buying a Lexus LS400 (1990-1997) Cylinder Head (Part Number: 1110159145)**

### **Pros**

1. **Reliability and Durability** Lexus LS400 engines, particularly the 4.0L V8 (Type 1UZ-FE), are known for their robust construction and longevity when properly maintained. The cylinder head is a critical component, and a genuine or high-quality aftermarket replacement can restore performance and prevent leaks or misfires.

2. **Performance Potential** The LS400 engine is a high-performance powerplant capable of producing around 270 300 horsepower in stock form. A well-maintained or restored cylinder head ensures optimal airflow, combustion efficiency, and power delivery, making it ideal for enthusiasts who want to preserve or enhance performance.

3. **Availability of Parts and Support** Lexus/Lexus parts, including cylinder heads, are widely available through dealerships, specialty auto parts stores (like RockAuto, JEGS, or Summit Racing), and online marketplaces. The LS400 community is active, with forums (e.g., Lexus-Rally.com, LS400.net) offering troubleshooting and installation guidance.

4. **Compatibility with Modifications** The LS400 is a popular platform for engine modifications, including forced induction (turbocharging/supercharging), intake/exhaust upgrades, and tuning. A fresh cylinder head is often a prerequisite for such projects, ensuring compatibility with aftermarket components like headers, high-flow intake manifolds, or performance camshafts.

5. **Long-Term Cost Savings** While the upfront cost of a new or rebuilt cylinder head may be higher than a used one, investing in a quality part can prevent costly engine damage from overheating, valve float, or exhaust gas leaks. A properly installed head reduces the risk of catastrophic failure in the long run.

6. **Aesthetic and Collectibility Value** The LS400 is a sought-after classic luxury car, especially in its early generations. Restoring or maintaining key components like the cylinder head preserves the vehicle s value for enthusiasts and collectors. A well-done restoration can make the car more appealing for sales or show events.

7. **Ease of Installation (With Proper Tools)** While cylinder head replacement requires mechanical skill and the right tools (torque wrench, gasket scraper, head gasket kit, and possibly a head lift), the process is manageable for experienced DIYers. Lexus/Lexus engines are designed with accessibility in mind, though some steps (e.g., valve spring compression) can be labor-intensive.

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### **Cons**

1. **High Upfront Cost** A genuine Lexus LS400 cylinder head (OEM part 1110159145) can cost between **$800 and $1,500 **, depending on the source (dealership vs. aftermarket). Rebuilt or remanufactured heads may be slightly cheaper but still expensive compared to mass-market vehicles. Aftermarket heads (e.g., from companies like **JE, Crane, or Pro Cylinder Heads**) can be more affordable but may lack OEM precision or longevity guarantees.

2. **Labor-Intensive Installation** Replacing a cylinder head requires disassembling the engine, removing the head, cleaning surfaces, applying a new gasket, and reassembling with precision. This is a **multi-day project** for most DIYers and may require professional help if unfamiliar with engine work. Labor costs at a shop can add **$500 $1,500 **, depending on location and shop rates.

3. **Risk of Counterfeit or Low-Quality Parts** The aftermarket for Lexus parts is vast, and some sellers may offer **fake or poorly remanufactured heads**. Buying from reputable suppliers (e.g., **RockAuto, Summit Racing, or specialized LS400 forums**) reduces this risk but requires due diligence. Always verify the part s authenticity and build quality before purchasing.

4. **Potential for Hidden Damage** If the engine has been previously modified (e.g., forced induction, aggressive camshafts, or improper head gasket replacement), the cylinder head may already have **warping, cracked valves, or worn valve seats**. Inspecting the head for damage before installation is crucial, and additional repairs (e.g., valve grinding, seat machining) may be needed.

5. **Specialized Tools and Knowledge Required** Proper cylinder head installation demands **precision torque settings, proper gasket application, and valve spring compression**. Using incorrect techniques can lead to **leaks, warping, or even engine damage**. Beginners may struggle without guidance from a mechanic or experienced enthusiast.

6. **Time and Patience** Engine work is not a quick fix. The process involves **cleaning, machining (if needed), gasket installation, valve adjustment, and final torqueing**, which can take **20 40 hours** for a DIYer. This time commitment may not be feasible for those with limited mechanical experience or tight schedules.

7. **Warranty and Return Risks** Aftermarket parts often come with **limited warranties** (e.g., 90 days to a year), and OEM parts may not be transferable if bought used. If the head fails shortly after installation, repairs may fall on the owner unless the seller offers a robust return policy.

8. **Environmental and Safety Concerns** Engine disassembly involves **removing coolant, oil, and potentially toxic fluids** (e.g., old head gaskets may contain asbestos in older models, though this is rare in the LS400). Proper disposal of fluids and parts is necessary to avoid environmental harm.

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### **Conclusion**

Buying a **Lexus LS400 (1990 1997) cylinder head (1110159145)** is a **wise investment** for owners who prioritize **performance, reliability, and long-term engine health**. The LS400 s reputation for durability makes it a strong candidate for restoration or modification, and a fresh cylinder head is a key component in maintaining its power and efficiency. However, the **high cost, labor intensity, and technical challenges** of installation mean it is not a decision to be taken lightly.

For **enthusiasts with mechanical experience**, the benefits such as **improved performance, engine longevity, and collectible value** outweigh the drawbacks. For **casual drivers or those without engine repair skills**, the risks of **costly mistakes, time investment, or hidden damage** may make it more prudent to consult a professional mechanic or consider alternative solutions (e.g., rebuilding an existing head or opting for a remanufactured unit).

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### **Recommendation**

- **Purchase a high-quality aftermarket or OEM cylinder head** from a trusted supplier (e.g., **RockAuto, Summit Racing, or a specialized LS400 parts dealer**).

- **Inspect the head for warping, cracks, or valve damage** before installation. If needed, send it to a **machine shop** for valve grinding or seat machining.

- **Follow torque specifications precisely** and use a **new head gasket kit** (e.g., **Fel-Pro or ATE**).

- **Consider a professional installation** if unsure about valve spring compression or final torqueing.

- **Hire a reputable engine specialist** familiar with Lexus/Lexus engines to perform the replacement. While labor costs will be higher, it ensures proper installation and avoids costly errors.

- **Explore remanufactured heads** (e.g., from **Crane or Pro Cylinder Heads**), which often come with warranties and may be more affordable than OEM parts.

- **Check for used cylinder heads** in good condition (e.g., from **eBay, Craigslist, or LS400 forums**), but **inspect for wear, cracks, or previous damage** thoroughly.

- **Prioritize other maintenance tasks** (e.g., valve adjustment, coolant system flush) before tackling the head replacement to avoid compounding issues.

- **Pair the cylinder head replacement with complementary upgrades** (e.g., **high-flow intake manifold, headers, or a performance camshaft**) to maximize gains.

- **Consider forced induction** (turbocharging/supercharging) if you plan to push the engine beyond stock power levels, but ensure the head can handle the increased stress.

Ultimately, **the decision depends on your mechanical comfort level, budget, and long-term goals for the vehicle**. For those committed to preserving or enhancing their LS400, a **properly installed cylinder head is a worthwhile investment** just ensure it s done correctly to avoid future headaches.

Details:

Parts are in pre-owned condition and may have small cosmetic issues such as scratches or scrapes and/or dirt dust lodged crevices. Every part I sell is OEM UNLESS SPECIFIED which means it direct fitment as long you verify the year range, make, and model. Love to help you with anything.

part #: 1110159145 prices

• $199.99-$200.00

specifications cylinderheapar:

• for models: Ls400
• for makes: Lexus
• for years: 1990-1997
• mpn: 1110159145
• conditions options: One Single Head
• items included: Bolts
• genuine oem: Yes
• material: Aluminum
• vintage part: No
• type: Cylinder Head
• year: 1995
• finish: Unfinished

seller cylinderheapar:

• # reviews: 304
• rating: 99.0%
• city: Sutter Creek, California

general cylinderheapar:

• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: Used

offer cylinderheapar:

• availability: In Stock
• options: Ship-to-home
• started: April 22, 2026
• best offers: True
• quantity: 1
• sold: 0

payments cylinderheapar:

• wallet: Google-pay
• credit card: Diners-club
• other

shipping cylinderheapar:

• type: Calculated
• cost: $0.00
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• class: Standard
• transit: 3-8 Days

returns cylinderheapar:

• paid by: Buyer
• time: 30 Days
• policy: Returns Accepted

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