CADILLAC 3547969 Cylinder Head 306-01592 4.6L

( Manufacturer Part Number: 3547969 ), ( Type: Cylinder Head Assembly ), ( Manufacturer Warranty: 1 Month ), ( Ipn: 306-01592 ), ( Id: E7de9f7f-9afe-4bd9-8593-a355a758164b ), ( Interchange: 306-1592 ), ( Year: 97 )

Review CADILLAC 4.6l Cylinder Head fits DEVILLE SEVILLE 1995–1999

The **1995 1999 Cadillac DeVille/Seville 4.6L Northstar V8 cylinder head** (part number **3547969**) is a meticulously engineered component designed to deliver the hallmark performance, reliability, and luxury synonymous with Cadillac s legendary Northstar engine family. This forged aluminum cylinder head is a masterpiece of automotive engineering, featuring a **dual overhead camshaft (DOHC) design** with **four valves per cylinder (2 intake, 2 exhaust)**, optimized for precise airflow and superior combustion efficiency. The head is crafted from high-strength **7075-T6 aluminum alloy**, ensuring an ideal balance of weight reduction and structural integrity, which contributes to the Northstar s signature smooth power delivery and refined operation. Each valve is operated by **hydraulic lifters**, eliminating the need for manual adjustment and ensuring consistent performance throughout the engine s lifespan. The head incorporates **individual throttle bodies (ITBs)** for each cylinder, allowing for precise fuel-air mixture control and enhancing throttle response, a hallmark of the Northstar s signature "instant-on" power. The **intake ports** are generously sized and sculpted to maximize airflow, while the **exhaust ports** are designed to efficiently expel combustion gases, reducing backpressure and improving exhaust scavenging. The head also features **integrated camshaft covers** with **oil passages** for the camshaft bearings, streamlining the design and reducing potential leak points. Additionally, the **valve cover** is a precision-machined aluminum component, often featuring the iconic Northstar logo, and is sealed with **high-temperature silicone gaskets** to prevent oil leaks and maintain optimal engine bay cleanliness. This cylinder head is a critical component in the **4.6L Northstar V8**, which produces **290 300 horsepower** (depending on the year and model) and **280 290 lb-ft of torque**, delivering a blend of power, refinement, and durability that has made the DeVille and Seville legendary in the luxury automotive world. Whether restoring a classic Cadillac or maintaining a modern classic, this cylinder head is essential for preserving the engine s performance, reliability, and the unmistakable Northstar sound and feel.

### **Pros and Cons of Buying a 1995 1999 Cadillac DeVille/Seville with a 4.6L Northstar Engine (Cylinder Head: CAD3547969)**

#### **Pros**

1. **Powerful Engine (4.6L Northstar V8)**

- The Northstar engine is one of the most reliable and smooth-running V8s of its era, known for its balanced design and high performance.

- Produces **290 300 horsepower** (depending on year and modifications), making it capable of handling highway speeds and towing light loads with ease.

- Excellent throttle response and smooth power delivery, which enhances driving enjoyment.

2. **Luxury and Comfort**

- Cadillac s full-size luxury sedans from this era offer **spacious interiors**, high-quality materials (for the time), and a refined ride.

- Features like **power seats, heated/ventilated seats, leather upholstery, and advanced climate control** make long drives comfortable.

- The **Seville** (two-door coupe) is particularly stylish, while the **DeVille** (four-door sedan) provides more practicality.

3. **Durability of the Northstar Engine**

- The **4.6L Northstar** is known for its **long lifespan** when properly maintained, often exceeding **200,000 300,000 miles** with regular upkeep.

- The **aluminum block and cylinder heads** reduce weight and improve heat dissipation, reducing the risk of overheating compared to iron-block engines.

- **No major reliability disasters** like some other V8s of the era (e.g., early GM 5.0L or Ford 5.0L).

4. **Classic Cadillac Appeal**

- The **1995 1999 DeVille/Seville** is a well-regarded era in Cadillac s history, blending **American luxury with performance**.

- The **Northstar engine** is highly sought after by enthusiasts, meaning parts and aftermarket support are widely available.

- A well-maintained example can be a **fun, reliable daily driver or a weekend cruiser** with strong resale value among Cadillac fans.

5. **Modification Potential**

- The Northstar is **easily tunable**, with aftermarket support for **ECU remapping, forced induction (turbo/supercharger), and performance upgrades**.

- **Headers, exhaust, and suspension upgrades** can significantly improve throttle response and handling.

- **Stock or lightly modified**, it remains a **daily-driver-friendly** performance car.

6. **Reliability Compared to Contemporaries**

- While not as bulletproof as a modern car, the **Northstar is far more reliable than many V8s from the same era** (e.g., early GM 5.0L, Ford 5.0L, or even some Chrysler engines).

- **No known catastrophic failures** if maintained properly (oil changes, cooling system checks, timing belt replacement if applicable).

---

#### **Cons**

1. **Maintenance Costs and Complexity**

- **High-quality parts are expensive** Cadillac is no longer producing these engines, so **OEM parts (especially for the Northstar) can be costly**.

- **Specialized labor** may be needed for **timing belt (if applicable), valve seals, or head gasket replacements** (though head gaskets are less of an issue than in iron-block engines).

- **Cooling system maintenance** is critical **thermostats, water pumps, and radiators** wear out and must be replaced proactively.

2. **Electrical and Computer Issues**

- **1990s electronics can be finicky** **fuse boxes, sensors, and wiring harnesses** may require occasional repairs.

- **ECU (Engine Control Unit) failures** can occur, especially if the car has been modified or driven hard.

- **Window regulators, door locks, and climate control systems** can fail and are often **expensive to repair**.

3. **Fuel Economy**

- The **4.6L Northstar is not fuel-efficient** by modern standards, averaging **14 16 MPG city / 20 22 MPG highway** (worse if modified).

- **Gasoline prices** make long-distance driving more expensive than in a modern sedan.

4. **Safety and Modern Standards**

- **Lack of modern safety features** no **stability control, advanced airbag systems, or collision avoidance tech**.

- **Rust** can be an issue, especially in **frame rails, subframes, and body panels**, particularly in snowy or coastal climates.

- **NHTSA crash test ratings** are **not as strong as modern vehicles**, making it less safe in a severe collision.

5. **Depreciation and Market Value**

- While **well-maintained Northstars hold value**, the **overall Cadillac market is not as strong as luxury brands like Lexus or BMW**.

- **Parts availability declines over time** older mechanics may not be familiar with the Northstar, increasing repair costs.

6. **Potential Hidden Issues**

- **Timing belt (if equipped)** Some early Northstars used a **timing belt** (not a chain), which must be replaced **every 60,000 100,000 miles** to avoid catastrophic engine failure.

- **Water pump failure** The **thermostat housing and water pump** can fail, leading to **overheating and coolant leaks**.

- **Transmission issues** The **4T60-E automatic transmission** (common in these years) can develop **slippage or rough shifting** if not maintained.

- **Suspension wear** **Shocks, struts, and bushings** degrade over time, leading to **rough rides and poor handling**.

7. **Insurance Costs**

- **Classic luxury cars can be expensive to insure**, especially if modified or driven frequently.

- **Agreed-value policies** (for classic cars) may be necessary to avoid underinsurance risks.

---

### **Conclusion and Recommendation**

#### **Who Should Buy This Car?**

- You **prioritize driving enjoyment and luxury** over modern safety and efficiency.

- You **plan to maintain it properly** (regular oil changes, cooling system checks, transmission fluid changes).

- You **enjoy classic American muscle** and don t mind higher maintenance costs.

- You **find a well-documented example** with **low mileage (under 100,000 miles) and a clean service history**.

- You **intend to keep it as a daily driver or weekend project** rather than a long-term investment.

- You **need a reliable, low-maintenance daily driver** modern sedans are far more practical.

- You **can t afford unexpected repairs** (electrical, cooling, transmission).

- You **live in a harsh climate** (salt, extreme heat/cold can accelerate rust and wear).

- You **don t enjoy working on cars** some repairs (e.g., head gasket, timing belt) require mechanical skill.

- You **prioritize fuel efficiency and modern safety** over classic appeal.

#### **Final Recommendation**

- **Want a smooth, powerful, and luxurious classic car** that still drives well today.

- **Are prepared for maintenance** (oil changes, cooling system upkeep, occasional electrical fixes).

- **Find a well-maintained example** with **no major engine or transmission issues**.

- **Get a pre-purchase inspection** (focus on **engine compression, cooling system, transmission, and electricals**).

- **Check for rust** (especially in the **frame, subframe, and wheel wells**).

- **Verify service records** (oil changes, timing belt/water pump replacements if applicable).

- **Budget for future repairs** expect **$1,000 $3,000/year** in maintenance if not already done.

**If you love the Northstar s character, performance, and luxury, it s a rewarding buy.** If you need a **no-nonsense, low-maintenance vehicle**, a modern sedan or truck would be a better choice.

Details:

CADILLAC DEVILLE 80 UP 95 LH 8-279 4.6L. CADILLAC DEVILLE 80 UP 95 RH 8-279 4.6L. In some cases the Transmission Control Computer module is internal and incorporated with valve body, which may require body to be replaced. Some external sensors or solenoids may need to be replaced.

Quick shipping. Picture in the listing may not be of actual item sold; it a stock picture only. Buyer pays return shipping if wrong color ordered. CADILLAC SEVILLE 95-99 RH.

Transfer cases will not be included with transmissions from 4x4 or All Wheel Drive vehicles. Axle seals, front and drive shaft seals will also need to be replaced. Depending on the age of vehicle and other circumstances they will rust show signs corrosion. Free shipping, if offered, applies only to commercial addresses with proper equipment dock and forklift unload.

Transmission lines will need flushed, along with the transmission oil cooler needs replaced if equipped, this to be done so contaminants from bad not ruin your replacement. Engines must be shipped to a commercial address with dock and forklift or the closest shipping terminal. Warranty period begins the day after delivery. Most items are shipped the same-day as purchase.

Transmissions must be shipped to a commercial address with dock and forklift or the closest shipping terminal. Buyer will need to replace the transmission oil filter, put a new pan gasket on, flush and add manufacturer specific fluids.

part #: 3547969 prices

• $224.99-$560.03

specifications cylinderheapar:

• for models: Deville, Seville
• for makes: Cadillac
• for years: 1995-1999
• mpn: 3547969
• type: Cylinder Head Assembly
• manufacturer warranty: 1 Month
• ipn: 306-01592
• id: E7de9f7f-9afe-4bd9-8593-a355a758164b
• interchange: 306-1592
• year: 97

shipping cylinderheapar:

• type: Fixed
• service: Standard
• transit: 3-7 Days
• cost: $0.00
• class: Standard

payments cylinderheapar:

• credit card: Mastercard
• wallet: Apple-pay
• other

seller cylinderheapar:

• # reviews: 27471
• rating: 99.7%
• city: Erie, Pennsylvania

returns cylinderheapar:

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

offer cylinderheapar:

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

general cylinderheapar:

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

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