25331TGHH DORMAN Somerset Expansion Plug Rear Buick

Review DORMAN For Buick Somerset Expansion Plug Rear for BUICK 1986–1987

The Dorman 25331TGHH Expansion Plug Rear is a crucial component for the heating and cooling system in select 1986 and 1987 Buick Somerset models. This high-quality replacement part is engineered to fit and function identically to the original equipment, ensuring optimal system performance.

Measuring approximately 3.5 inches in length and 1.5 inches in diameter, this expansion plug is designed with a durable, heat-resistant housing that can withstand the extreme temperatures found within the cooling system. The housing is sealed with an O-ring to prevent coolant leakage and ensure a tight seal.

At the business end of the expansion plug is a multi-lobed seal that expands and contracts with the cooling system as it operates. This seal is critical for maintaining the proper pressure within the cooling system, which in turn ensures consistent engine temperature and protection against overheating.

The Dorman 25331TGHH Expansion Plug Rear is manufactured to meet or exceed OEM specifications, ensuring a reliable and long-lasting repair. This plug is an excellent choice for DIY enthusiasts or professional technicians seeking to restore the cooling system to its original condition.

The package includes one expansion plug, making it a convenient and cost-effective solution for replacing a worn or failed plug. Installation is typically straightforward and can be completed in a relatively short amount of time using common hand tools.

In summary, the Dorman 25331TGHH Expansion Plug Rear is a vital component for the heating and cooling system in select 1986 and 1987 Buick Somerset models. Engineered for a perfect fit and function, this expansion plug is designed for durability and reliability, making it an excellent choice for those seeking to restore their vehicle's cooling system to its original performance.

Dorman 25331TGHH Expansion Plug for 1986-1987 Buick Somerset: A Comprehensive Analysis

The Dorman 25331TGHH expansion plug is designed to fit the rear of 1986-1987 Buick Somerset engines. This part is essential for maintaining the cooling system's efficiency. In this analysis, we will discuss the potential advantages and disadvantages of purchasing this expansion plug to help you make an informed decision.

1. OEM Equivalency: The Dorman 25331TGHH expansion plug is an exact match to the original equipment manufactured (OEM) part, ensuring proper engine performance and cooling system effectiveness.

2. Improved Cooling: A faulty or worn-out expansion plug can lead to poor cooling system performance, which may result in engine overheating. Replacing the expansion plug with a new one, like the Dorman 25331TGHH, can help restore the cooling system's efficiency.

3. Cost-Effective: Buying an aftermarket part like the Dorman 25331TGHH can save you money compared to purchasing a new OEM part from the dealership.

4. Easy Installation: The expansion plug is typically an easy-to-replace component, and installing the Dorman 25331TGHH should not require extensive mechanical knowledge or skills.

1. Quality Concerns: While the Dorman 25331TGHH expansion plug is designed to be an OEM equivalent, some users have reported issues with the part's quality, such as leaks or poor sealing.

2. Potential for Incorrect Part: If you are not entirely confident in your ability to identify the correct part number for your specific application, there is a risk of purchasing and installing the incorrect expansion plug, which may not function properly or even cause damage to the engine.

3. No Warranty: Aftermarket parts, including the Dorman 25331TGHH expansion plug, often do not come with the same level of warranty coverage as OEM parts.

The Dorman 25331TGHH expansion plug is an affordable and effective solution for replacing a faulty or worn-out expansion plug in the rear of a 1986-1987 Buick Somerset engine. While there are some potential disadvantages, such as quality concerns and the lack of a warranty, the advantages, including OEM equivalency, improved cooling, and cost savings, generally outweigh the disadvantages for most users.

If you require an expansion plug for your 1986-1987 Buick Somerset and are looking for a cost-effective solution, the Dorman 25331TGHH expansion plug is a suitable choice. However, be sure to double-check the part number to ensure compatibility with your specific application and consider purchasing from a reputable supplier to minimize the risk of receiving a low-quality part.

Details:

Ideal solution - this plug is a reliable replacement for an original part that missing or has failed due to fatigue. Position: rear. Durable construction - this part is made from quality materials to ensure reliable performance and long service life. Trustworthy quality - backed by team of product experts in the USA and more than a century automotive experience.

specifications engineblocksam:

• for makes: Buick
• for years: 1986–1987
• brand: Dorman
• mpn: 25331tghh
• part type: Plug
• placement on vehicle: Rear
• manufacturer warranty: 12 Month Warranty
• notes: Engine Core Plug Rear; 49.58mm Brass Cup
• years: 1986 1987
• application: Buick Somerset Expansion Plug
• product name 2: Engine Core Plug
• cs-sku: 400

shipping engineblocksam:

• class: standard
• type: fixed
• service: fedex ground / fedex home delivery
• transit: 4-7 days
• carrier: fedex

offer engineblocksam:

• availability: in stock
• in stock #: 1
• options: ship-to-home
• sold #: 9
• started: april 18, 2026
• price: $51.94
• item condition: New

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• category: Auto Parts > Car Truck Accessories > Engines > Blocks

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• # reviews: 329080
• city: somerset, massachusetts
• rating: 98.8%

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• policy: returns accepted
• paid by: seller