OLDSMOBILE 306-01798R Cylinder Head Aurora 40L

( Model: AURORA ), ( Part Type: Cylinder Head ), ( Conditions Options: 4.0l ), ( Genuine Oem: Yes ), ( Ipn: 306-01798r ), ( Partout Id: A-111844179 )

Review OLDSMOBILE Cylinder Head 40l Aurora fits 2001–2002

The **Oldsmobile 306-01798R cylinder head** is a meticulously crafted, high-performance component designed specifically for the **4.0L Vortec V6 engine** found in the **2001 2002 Oldsmobile Aurora**, as well as select models from the **Alero, Aurora, and Pontiac Grand Prix** platforms. This cast aluminum head, identified by its unique **306-01798R part number**, features a robust and precision-engineered design optimized for reliability and power output. The head incorporates **four valves per cylinder** (two intake and two exhaust) arranged in a **DOHC (Dual Overhead Camshaft)** configuration, allowing for superior airflow and combustion efficiency. The intake ports are generously sized to maximize volumetric efficiency, ensuring a strong charge of air-fuel mixture enters the combustion chamber, while the exhaust ports are contoured to minimize backpressure and enhance scavenging. The **hydraulic valve lifters** and **solid roller rocker arms** work in tandem with the **cast iron camshafts** to deliver smooth, responsive valve operation, reducing wear and extending the lifespan of the entire valve train.

This cylinder head is engineered with **high-strength aluminum** to balance weight savings with structural integrity, reducing overall engine weight while maintaining rigidity to prevent warping under high heat and load conditions. The **combustion chambers** are precisely shaped to optimize flame propagation and combustion efficiency, contributing to improved fuel economy and reduced emissions. The head is equipped with **separate intake and exhaust camshafts**, each driven by a **timing chain** (or belt, depending on the application) for precise timing control, ensuring optimal valve timing throughout the engine s RPM range. The **spark plug bores** are strategically positioned for even combustion distribution, while the **oil control rings** and **valve seals** are designed to minimize oil consumption and blow-by, maintaining engine cleanliness and performance over time.

For durability and sealing, the **306-01798R head** features **high-quality gaskets** (including intake and exhaust gaskets) that are engineered to withstand the thermal cycling and pressure fluctuations inherent in high-performance applications. The **spark plug threads** are precision-machined to ensure a secure, leak-free fit, while the **camshaft bearings** and **journal surfaces** are designed to handle the stresses of aggressive driving and extended engine life. This head is fully compatible with **E85 ethanol blends** when used with the appropriate fuel system modifications, making it a versatile choice for both stock and modified applications. Whether restoring a classic Aurora to its original glory or upgrading an existing engine for enhanced performance, the **306-01798R cylinder head** delivers the reliability, precision, and power potential that Oldsmobile s legendary V6 engines are known for. Proper installation, including correct torque specifications and gasket application, is essential to ensure optimal performance and longevity.

**Pros and Cons of Buying an Oldsmobile 306-01798R Cylinder Head for a 40L 01-02 Aurora**

1. **Compatibility and Fit:** The 306-01798R cylinder head is designed specifically for the 4.0L Aurora engine (L36/L37), ensuring a proper fit and alignment with the block, intake manifold, and exhaust ports. This reduces the risk of leaks, improper sealing, or performance issues that can arise with aftermarket or mismatched parts.

2. **Performance Potential:** A well-maintained or restored cylinder head can improve engine performance by optimizing airflow, combustion efficiency, and cooling. If the head is in good condition, it may allow for better throttle response, power output, and reliability compared to a worn or damaged original head.

3. **Cost-Effective Replacement:** Compared to a full engine rebuild or replacement, purchasing a used or rebuilt cylinder head is significantly cheaper. This makes it a practical option for restoring power or fixing leaks without a major investment.

4. **Availability of Parts:** Since the Aurora is a relatively common vehicle from the early 2000s, finding compatible gaskets, bolts, seals, and other small parts is easier than for rare or discontinued models. This simplifies the installation process.

5. **Potential for Customization:** If you re looking to modify the engine (e.g., porting, polishing, or installing a high-flow intake/exhaust), a fresh cylinder head provides a clean slate. Some owners also opt for aftermarket heads designed for the 4.0L, but a GM OEM part ensures reliability.

6. **Warranty or Guarantee (if new/rebuilt):** If you purchase a new or professionally rebuilt head, some sellers offer warranties or guarantees, reducing the risk of immediate failure after installation.

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1. **Condition and Wear:** Used cylinder heads may have hidden damage, such as cracked valves, warped decks, or worn valve seats. Without a thorough inspection (or a reputable seller s certification), you risk installing a faulty part that leads to leaks, misfires, or catastrophic failure.

2. **Age and Rust:** The 01-02 Aurora was produced during a period when rust and corrosion were common in older GM vehicles, especially in regions with harsh winters. A used head may have internal rust, which can cause sticking valves, worn guides, or head gasket failure.

3. **Cost of Rebuilding:** Even if the head is structurally sound, it may require a rebuild (valve grinding, seat machining, or deck surface resurfacing). This adds to the overall cost and time investment, potentially negating some of the savings from buying used.

4. **Limited Longevity:** Like all mechanical components, cylinder heads wear out over time. If the engine sees heavy use (e.g., towing, high RPMs, or frequent overheating), the head may not last as long as you d like, requiring future replacement.

5. **Installation Complexity:** Replacing a cylinder head is a labor-intensive job that requires removing the engine from the vehicle, swapping components, and ensuring proper torque specifications. If you re not experienced with engine work, this may necessitate hiring a mechanic, adding to costs.

6. **Compatibility with Modifications:** If you ve already modified the engine (e.g., turbocharging, forced induction, or aggressive tuning), a stock cylinder head may not handle the increased stress. You might need a stronger aftermarket head or additional reinforcement.

7. **Seller Reliability:** Buying from private sellers (e.g., Facebook Marketplace, Craigslist) carries risks of misrepresented condition or fraud. Without a clear history or inspection, you could end up with a part that doesn t meet your expectations.

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Buying a 306-01798R cylinder head for your 01-02 Aurora can be a **smart, cost-effective solution** if you prioritize compatibility, performance, and long-term reliability. It s particularly advantageous if you re restoring a project car, fixing leaks, or seeking a budget-friendly upgrade. However, the **condition of the part, potential hidden damage, and installation challenges** are critical factors that can turn this into a costly mistake if not addressed properly.

- If buying used, inspect it for cracks, warping, or rust. Look for signs of past repairs (e.g., welded areas, uneven surfaces).

- Request documentation (e.g., rebuild records, photos of the head before purchase) or have a mechanic inspect it.

- Consider purchasing from a reputable parts dealer or salvage yard that offers warranties or certifications.

- Account for gaskets, bolts, seals, and any necessary rebuild work (e.g., valve adjustment, deck machining).

- If the head is worn, factor in the cost of professional rebuilding or porting for performance gains.

- If you re not experienced with engine work, hire a trusted mechanic to install the head. Improper torque or sealing can lead to leaks or damage.

- Ensure all related components (e.g., intake manifold, exhaust headers, cooling system) are in good condition to complement the new head.

- If the head is beyond repair, weigh the cost of a rebuild against other options, such as a used engine swap or a full engine rebuild.

- For performance applications, research aftermarket cylinder heads (e.g., from companies like **JE, Edelbrock, or Crane**) that offer improved airflow and durability.

- After installation, monitor the engine for leaks, overheating, or performance issues. Regularly check coolant levels, valve clearance, and head gasket integrity.

- If you plan to keep the car long-term, consider upgrading to a more robust head or engine in the future to avoid repeated replacements.

**Final Verdict:** The 306-01798R cylinder head is a **viable and practical purchase** for Aurora owners who need a reliable, OEM-replacement part. However, success depends on **due diligence in sourcing, inspection, and installation**. If you re willing to invest time in verifying the part s condition and ensuring proper setup, it can significantly improve your engine s performance and longevity. If you re unsure about the head s quality or lack mechanical experience, it may be worth exploring other options or consulting a professional before committing.

Details:

Please verify identification numbers, wheelbase measurements, and ID codes. The pre-installation maintenance items are as follows: Drain and replace engine oils to manufacturers suggested levels. Replace Oil Filter, Valve Cover Gaskets, Pan Gasket Rear Main Seal, Inspect and replace, if needed, timing gears, chains or belts gaskets, thermostat gasket, Flush cooling system refill with antifreeze to appropriate level, Install New Spark Plugs, Belts Hoses. Oversize charges are implemented for items over using the same formula and if its 130 an $100.00 charge is applied.

A Home-based business, or a farm, do not qualify as business/commercial address for logistical purposes. That is not the way this system was designed. A business/commercial delivery address is required for the stated shipping price. We ask that you verify the actual condition versus what are expecting to prevent any issues later.

Residential Limited Access fees range from $50-$100. This system was designed as a benchmark with certain understandings. Orders placed after 10:00 am CST cannot be guaranteed shipping that day if option applies to your listing. The difficulty as you can see is placing exact charges on each listing when so many variables are present.

Buyers must be willing to answer their calls and discuss the delivery of item with carrier. Common used part visual blemishes most likely present. Visual flaws still may be present as the item is used. Specific item information and warranty is posted on the listing.

Lift gate Fees range from $50-$100. As well charges are based on dimensional weight, not actual weight. Most carriers do not allow hand unloading. Not allowing an item to be delivered is the same as refusing it.

A condition does not mean new or perfect it means the item is in great used. This may vary during heavy traffic time periods and buyers would be notified of any anticipated delay. If an RMA# is not provided there may be a delay in processing the return. We prefer it, its faster and it provides a written record for your protection ours.

They are not reflective of the actual part or condition being sold. Are NOT included with this listing. Essentially this means that the item may be in better or worse condition than stated. A telephone number is required.

part #: 306-01798r prices

• $160.00-$220.45

specifications cylinderheapar:

• for makes: Oldsmobile
• for years: 2001-2002
• model: Aurora
• part type: Cylinder Head
• conditions options: 4.0l
• genuine oem: Yes
• ipn: 306-01798r
• partout id: A-111844179

offer cylinderheapar:

• best offers: True
• sold: 0
• options: Ship-to-home
• started: February 10, 2026
• quantity: 1
• availability: In Stock

seller cylinderheapar:

• city: Arena, Wisconsin
• # reviews: 9611
• rating: 99.9%

payments cylinderheapar:

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

general cylinderheapar:

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

shipping cylinderheapar:

• service: FedEx Ground / FedEx Home Delivery
• type: Calculated
• carrier: FedEx
• transit: 3-8 Days
• cost: $107.49
• class: Standard

returns cylinderheapar:

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

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