BUICK 300.GM4W63 Core Engine Stuckft Riviera 401 V8 1351293

( Model: RIVIERA ), ( Part Type: Engine ), ( Conditions Options: Core, 401, For Rebuild, Stuck, Note ), ( Genuine Oem: Yes ), ( Ipn: 300.gm4w63 ), ( Designation: For Parts Not Working )

Review BUICK Core 401 V8 Engine Stuckft Fits Riviera fits 300 1963

Introducing the Buick 300.gm4w63 core 401 V8 engine, a iconic powertrain that graced the 1963 Buick Riviera with unrivaled performance and sophistication. This engine is a testament to Buick's engineering excellence during the golden era of automobile design.

The 401 cubic inch V8 engine, also known as the "Nailhead" engine due to its unique shape, is a marvel of engineering that delivers both power and efficiency. It boasts a displacement of 6,677cc and features a cast iron block with aluminum heads, which is a combination that provides excellent heat dissipation and responsiveness.

The engine is equipped with a single barrel carburetor that ensures smooth and consistent fuel delivery to each cylinder. This 4-bolt main, overhead valve design features a compression ratio of 10.2:1, which generates an impressive 325 horsepower at 4,800 RPM and 445 lb-ft of torque at 3,200 RPM.

The engine's cylinder heads have large, exposed valves that are operated by a hydraulic lifter system, providing quiet and maintenance-free operation. The intake and exhaust ports are designed with a unique cross-flow layout, which optimizes the flow of air and fuel into the cylinders and the exhaust gases out, resulting in improved engine performance and fuel economy.

The Buick 300.gm4w63 core 401 V8 engine is not only powerful but also visually striking. Its polished aluminum intake manifold and chrome valve covers add to the engine's aesthetic appeal, making it a true showpiece under the hood of the 1963 Buick Riviera.

This engine is a must-have for collectors, restorers, and enthusiasts who appreciate the rich history and engineering achievements of the past. It is a reliable and high-performing engine that will surely bring joy to any classic car enthusiast and turn heads wherever it goes.

When it comes to maintenance, the 401 V8 engine is relatively easy to work on due to its accessible design and straightforward components. Replacement parts are readily available, ensuring that this engine remains in top condition for years to come.

In summary, the Buick 300.gm4w63 core 401 V8 engine is a masterpiece of automotive engineering, delivering impressive power, unmatched style, and timeless appeal. It is a true icon of the classic car era and a must-have for any serious collector or enthusiast.

Buying a used Buick 401 V8 engine from a 1963 Riviera with a stuck cylinder head (GM part number: 300.gm4w63) comes with its own set of pros and cons that can help potential buyers make an informed decision.

1. Availability: Buick 401 V8 engines are relatively common and can be found in various markets, including salvage yards and online marketplaces.

2. Power: The 401 cubic inch V8 engine was a high-performance option for its time, delivering impressive power and torque for the Riviera.

3. Value: Compared to buying a new engine or a rebuilt engine from a dealership, a used engine can be a cost-effective solution for those on a budget.

4. Potential for restoration: For enthusiasts or collectors, a used engine with issues can be an opportunity to restore it to its former glory.

1. Unknown condition: When purchasing a used engine, it's impossible to know its exact condition without a thorough inspection. In this case, the engine has a known issue with a stuck cylinder head.

2. Repair costs: Depending on the extent of the damage to the engine, repair costs can be substantial. Replacing the cylinder head or other affected components may be necessary.

3. Compatibility: Ensure that the engine is compatible with the specific 1963 Riviera model and any modifications or upgrades that have been made.

4. Quality: Used engines, especially those with known issues, may not meet the same quality standards as new or rebuilt engines.

Buying a used Buick 300.gm4w63 401 V8 engine for a 1963 Riviera with a stuck cylinder head can be a cost-effective solution for those on a budget. However, potential buyers should be aware of the risks, including unknown condition, repair costs, compatibility, and potential for lower quality. Before making a purchase, it's essential to thoroughly research the engine's history, inspect it in person if possible, and consider the costs and benefits of repairing or replacing it.

If the decision is to move forward with purchasing the used engine, it's highly recommended to have it inspected by a qualified mechanic. This inspection will provide valuable information about the engine's condition and any necessary repairs. Additionally, considering purchasing the engine from a reputable seller with good customer reviews and a solid return policy can help minimize potential risks.

Details:

No expedited shipping is available. Dispute Resolution. CORE,401,FOR REBUILD, STUCK ,NOTE. The part has not been installed.

Check the Q A section for Business Support. Bumper assemblies DO NOT come with Upper Grilles unless stated. All parts sold as is except expressly provided below.

The part has not been altered, modified, disassembled, overheated or damaged. Axles Assemblies: Axle assemblies will not include any brake hardware: Calipers/Rotors/Shoes/Pads/Hoses/Brake Lines. Labor and Related Costs: This limited warranty does not cover labor, diagnostics, towing, rental car costs, or any other expenses related to the installation, testing, removal, replacement of a part. Brokered/non-stocked parts ordered specifically for your request.

Steering Columns: All steering columns sold will come without airbags. Transmissions: Transmissions will come with the torque converter and all sensors. Scope: This limited warranty covers defects in the purchased part that render it inoperable or defective within 90-day period

Please remember you are purchasing OEM Original Equipment Manufacturer USED parts. Exclusions from Limited Warranty. The part is not a special order. Normal wear and tear from the previous use is expected.

Sensors, valve covers, timing covers attached to core short/long blocks are not covered. Convenience Items: Items attached to or included with the part, such as wiring, bulbs, sockets, sensors, coils, distributor caps, spark plugs, water pumps, filters, brake parts, backing plates, hoses, vacuum lines, u-joints, timing belts/components, similar items, are considered convenience items and not covered by this limited warranty. Limited Warranty Coverage. Bolt-on items

Any bulbs or wiring still attached to the,Tail Light,assemblies are not warranted part of the listing in any way. The part is not a custom body cut.

part #: 300.gm4w63 price

• $500.00

specifications grokengines:

• for makes: Buick
• for years: 1963
• model: Riviera
• part type: Engine
• conditions options: Core, 401, For Rebuild, Stuck, Note
• genuine oem: Yes
• ipn: 300.gm4w63
• designation: For Parts Not Working

seller grokengines:

• city: Annandale, Minnesota
• # reviews: 46348
• rating: 99.7%

offer grokengines:

• quantity: 1
• started: May 1, 2026
• options: Ship-to-home
• availability: In Stock
• sold: 0

returns grokengines:

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

shipping grokengines:

• class: Standard
• cost: $390.00
• transit: 3-5 Days
• type: Fixed
• service: Standard

general grokengines:

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

payments grokengines:

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

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