PONTIAC 300.GM2S59 Core Engine Stuck Bonnevill 8-389 1238475

( Model: BONNEVILL ), ( Part Type: Engine ), ( Conditions Options: Core, 389, For Rebuild, Core, Stuck ), ( Genuine Oem: Yes ), ( Ipn: 300.gm2s59 ), ( Designation: For Parts Not Working )

Review PONTIAC Core Engine Assembly Stuck Fits fits BONNEVILLE 300 1959

The Pontiac Bonneville, introduced in 1959 as a full-size luxury car from General Motors, featured the impressive and powerful 300.gm2s59 core engine. This V8 engine was a workhorse of its time and is still sought after by collectors and enthusiasts for its unique character and performance.

The 308 cubic inch (5.9 liter) engine was designed to deliver power and torque, making it an ideal choice for cruising and highway driving. It boasts a cast iron block and aluminum heads, which not only contribute to its durability but also help in keeping the engine light. The engine has a bore and stroke measurement of 4.13 inches x 3.50 inches, respectively.

The 300.gm2s59 engine is equipped with a single 4-barrel carburetor, which allows for a more efficient air-fuel mixture to enter the combustion chamber. The engine generates a gross horsepower of 345 hp at 4600 rpm and a torque of 454 lb-ft at 2800 rpm. These impressive power figures make for an enjoyable driving experience, especially when paired with the classic automatic transmission of the era.

Despite being over six decades old, the 300.gm2s59 engine remains a favorite among automotive enthusiasts for its distinctive sound and powerful performance. However, like all engines, it can develop issues over time. One common problem that may arise in this engine is sticking valves, which can result in a decrease in engine performance and fuel efficiency.

A stuck 300.gm2s59 engine valve occurs when the valve does not close or open properly due to the buildup of carbon deposits or other impurities. The valve sticking can lead to incomplete combustion, which can cause a drop in power and fuel efficiency, as well as potential engine damage.

To address this issue, it is recommended to consult a professional mechanic or engine specialist for a thorough diagnosis and repair. The repair process may involve using specialized tools to remove the valves, cleaning and reconditioning them, or even replacing them if they are beyond repair.

In summary, the Pontiac Bonneville's 300.gm2s59 core engine is an iconic and powerful V8 engine from the 1950s. Its impressive specifications, including its 5.9 liter displacement, cast iron block, and aluminum heads, make it a favorite among collectors and enthusiasts. However, like all engines, it can develop issues, such as sticking valves, which may require professional repair to restore its performance and ensure safe operation.

Buying a Pontiac 300 GM2S59 Core Engine for a 1959 Bonneville: Pros, Cons, and Recommendation

The Pontiac 300 GM2S59 core engine is a popular choice among car enthusiasts for restoring or building custom projects based on the 1959 Bonneville. In this analysis, we will discuss the pros and cons of purchasing this engine to help you make an informed decision.

1. Authenticity and Performance: The Pontiac 300 GM2S59 engine is an original and authentic engine for 1959 Bonneville models, delivering the classic performance and sound that enthusiasts desire.

2. Availability: The engine is widely available from various sources, including salvage yards, rebuilders, and online marketplaces, which makes it relatively accessible for many buyers.

3. Affordability: Given its wide availability, the engine is often more affordable compared to purchasing a new or rebuilt engine from the manufacturer.

4. Customizability: Since the engine is being used for a custom project, buyers can take advantage of the availability of aftermarket parts to personalize their engine and enhance its performance.

1. Potential Issues: As with any used engine, there is a risk of encountering hidden issues or defects that may require additional repairs or expenses.

2. Compatibility: The Pontiac 300 GM2S59 engine may not be a perfect fit for every 1959 Bonneville, requiring potential modifications or adapters to ensure proper installation.

3. Performance Variability: Depending on the condition of the engine before purchase, buyers may encounter varying degrees of performance, ranging from excellent to subpar.

4. Time and Effort: Restoring or installing a used engine can be a time-consuming and labor-intensive process, requiring the expertise of skilled mechanics or extensive DIY knowledge.

The decision to purchase a Pontiac 300 GM2S59 core engine for a 1959 Bonneville project depends on individual preferences, resources, and priorities. While there are potential risks and challenges, the benefits of authenticity, affordability, and customizability make it an attractive option for many enthusiasts. Ultimately, thorough research, careful consideration, and a solid understanding of the project requirements are essential to making an informed decision.

1. Thoroughly inspect the engine before purchase, either personally or through a trusted mechanic.

2. Verify the engine's compatibility with the specific 1959 Bonneville model.

3. Budget for potential repairs or modifications.

4. Consider purchasing the engine from a reputable seller or rebuilder to increase the likelihood of a quality product.

5. Be prepared for the time and effort required to restore or install the engine.

Details:

No expedited shipping is available. Lack of these convenience items does not warrant a return. Axles Assemblies: Axle assemblies will not include any brake hardware: Calipers/Rotors/Shoes/Pads/Hoses/Brake Lines. For example, when installing a transmission, the torque converter needs to be seated properly on input shaft.

What is covered. Said convenience items are not covered under the 90-day warranty. 3531 County Road 3 NW. Full warranty not available for items listed as CORE.

Any bulbs or wiring still attached to the,Tail Light,assemblies are not warranted part of the listing in any way. If a return is accepted, please ship the item to address below. Avondale, MN 55302. Covered under warranty: An engine block is found to be cracked and NOT rebuild able would covered the 90-day warranty.

Items listed as CORE are only guaranteed rebuild able. Warranty does NOT cover labor, diagnostics, towing costs, rental car, or any other expenses related to an item being defective/damaged. Steering Columns: All steering columns sold will come without airbags.

Bumper assemblies DO NOT come with Upper Grilles unless stated. Check the Q A section for Business Support. Transmissions: Transmissions will come with the torque converter and all sensors.

part #: bonnevill prices

• $27.07-$839.57

specifications grokengines:

• for models: 300, Bonneville
• for makes: Pontiac
• for years: 1959
• model: Bonnevill
• part type: Engine
• conditions options: Core, 389, For Rebuild, Core, Stuck
• genuine oem: Yes
• ipn: 300.gm2s59
• designation: For Parts Not Working

shipping grokengines:

• service: Standard
• class: Standard
• transit: 4-9 Days
• type: Fixed
• cost: $335.00

payments grokengines:

• other
• credit card: Diners-club
• wallet: Paypal

offer grokengines:

• started: June 29, 2025
• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1

general grokengines:

• condition: For parts or not working
• Car Truck Parts Accessories > Engines Engine Parts > Engines

seller grokengines:

• # reviews: 36250
• rating: 99.3%
• city: Annandale, Minnesota

returns grokengines:

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

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