99458MNKK DORMAN Somerset Expansion Plug Rear Buick

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

Dorman 99458MNKK Expansion Plug Rear for 1986-1987 Buick Somerset

The Dorman 99458MNKK Expansion Plug Rear is a crucial component designed specifically for the cooling system of 1986 and 1987 Buick Somerset vehicles. This expansion plug is engineered to meet or exceed the original equipment (OE) performance, ensuring reliable and efficient cooling system operation.

The expansion plug is responsible for connecting the coolant expansion tank to the engine cooling system. It features a sturdy, corrosion-resistant design, making it suitable for withstanding the harsh conditions of an automotive environment. The plug's sealing surface is engineered to provide a tight, leak-free seal, preventing coolant loss and maintaining the optimal cooling system pressure.

The expansion plug's unique design includes a large, visible coolant level indicator, allowing drivers to easily check their coolant level without having to open the radiator cap. This feature not only simplifies the maintenance process but also helps prevent potential overheating issues.

The Dorman 99458MNKK Expansion Plug Rear is manufactured to meet or exceed OE specifications, ensuring a precise fit and reliable performance. It undergoes rigorous testing to ensure that it meets the highest standards for durability, leaks, and function.

Installing the Dorman 99458MNKK Expansion Plug Rear is a straightforward process. It comes with clear installation instructions to guide you through the process. By choosing this Dorman product, you can enjoy the peace of mind that comes with knowing you've used a high-quality, reliable replacement part for your 1986-1987 Buick Somerset.

The Dorman 99458MNKK is a rear expansion plug for Buick Somerset models from 1986 and 1987. This part is essential for maintaining the cooling system's efficiency. Let's explore the potential advantages and disadvantages of purchasing this Dorman part.

1. OEM Equivalence: The Dorman 99458MNKK is engineered to meet or exceed the performance specifications of the original equipment (OE) expansion plug.

2. Affordable: Compared to purchasing an original equipment manufacturer (OEM) part from a dealership, the Dorman part is generally more affordable.

3. Availability: Dorman parts are widely available at auto parts stores and online retailers.

4. Quality: Dorman is a reputable manufacturer known for producing high-quality aftermarket parts.

5. Time-saving: By purchasing the Dorman part instead of waiting for an OEM part order from a dealership, the vehicle owner can save time on repair.

1. Potential Fitment Issues: Although Dorman parts are designed to fit most applications, there is a possibility of minor fitment issues. However, these issues are usually minor and can be resolved through proper installation.

2. No Warranty Through Dealer: Since the Dorman part is purchased from an aftermarket supplier rather than a dealership, the vehicle owner may not receive the same warranty coverage as they would with an OEM part.

The Dorman 99458MNKK expansion plug is a cost-effective, high-quality alternative to an OEM part for repairing the cooling system on a 1986 or 1987 Buick Somerset. Although there is a slight risk of minor fitment issues, the pros of affordability, availability, and OEM equivalence outweigh the cons. Ultimately, the decision to purchase this part depends on the vehicle owner's budget, time constraints, and personal preference.

Details:

Position: rear. Durable construction - this part is made from quality materials to ensure reliable performance and long service life. Ideal solution - this plug is a reliable replacement for an original part that missing or has failed due to fatigue. 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: 99458mnkk
• part type: Plug
• placement on vehicle: Rear
• manufacturer warranty: 12 Month Warranty
• notes: Engine Core Plug Rear; 1-7/8 2
• years: 1986 1987
• application: Buick Somerset Expansion Plug
• product name 2: Engine Core Plug
• cs-sku: 400

seller engineblocksam:

• city: orlando, florida
• # reviews: 328940
• rating: 98.8%

returns engineblocksam:

• time: 30 days
• paid by: seller
• policy: returns accepted

payments engineblocksam:

• wallet: google-pay
• other
• credit card: discover

offer engineblocksam:

• options: ship-to-home
• availability: in stock
• started: april 18, 2026
• price: $19.17
• item condition: New
• sold #: 9
• in stock #: 1

general engineblocksam:

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

shipping engineblocksam:

• carrier: fedex
• transit: 4-9 days
• service: fedex ground / fedex home delivery
• type: fixed
• class: standard