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  3. GM 12855196

12855196 GM Engine Expansion Plug

12855196 GM Engine Expansion Plug
Product Aspects
BrandGM
Manufacturer Part Number12855196
Part TypeENGINE PLUG
Genuine OemYES
Manufacturer Warranty1 YEAR
Fitment TypeDIRECT REPLACEMENT
Fitment FootnotesDIESEL;LOCATION-ENGINE BLOCK;30MM;VENDOR;

Review GM Engine Expansion Plug

The GM 12855196 engine expansion plug is a critical component of an engine's cooling system, designed to prevent the engine from overheating during operation. This expansion plug is specifically engineered for use in certain GM vehicles, providing reliable performance and optimal engine protection.

The expansion plug is made of high-quality materials, including a durable ceramic insulator and a corrosion-resistant stainless steel housing. The insulator is designed to withstand the extreme temperatures generated by the engine, while the housing ensures a secure and leak-free installation.

The plug features a precise thermal expansion design, which allows it to expand and contract with the engine's cooling system, maintaining proper coolant flow and preventing coolant from entering the cylinder head. This is essential for maintaining the engine's optimal operating temperature and ensuring efficient engine performance.

The GM 12855196 engine expansion plug is easy to install, requiring no special tools or mechanical expertise. Simply remove the old expansion plug, clean the area, and install the new one according to the instructions provided. The plug comes complete with a new O-ring seal to ensure a proper seal and prevent coolant leaks.

The expansion plug is also covered by a manufacturer's warranty, providing peace of mind and protecting against any manufacturing defects. If you're looking for a reliable and effective solution to maintain the cooling system in your GM vehicle, the 12855196 engine expansion plug is an excellent choice.

With its high-quality materials, precise design, and easy installation, the GM 12855196 engine expansion plug is an essential component for any GM vehicle owner. By ensuring proper cooling system performance, you can help extend the life of your engine and maintain optimal performance on the road.

The GM 12855196 engine expansion plug, also known as an engine coolant thermostat, plays a crucial role in regulating the engine temperature. Here are some pros and cons of buying this part:

Pros:

1. Improved Engine Performance: A faulty engine expansion plug can lead to poor engine performance, including overheating, misfiring, and decreased fuel efficiency. Replacing the faulty expansion plug with a new one can help restore optimal engine performance.

2. Prevent Engine Damage: A damaged or faulty engine expansion plug can cause engine damage if left unaddressed. Replacing the part can help prevent costly repairs and potential engine damage.

3. Extended Engine Lifespan: Regularly replacing the engine expansion plug can help extend the lifespan of the engine by ensuring that it operates at the optimal temperature.

4. Cost-Effective: While the cost of a new engine expansion plug may seem expensive initially, it is generally a cost-effective solution compared to the potential cost of engine damage or repairs.

Cons:

1. Cost: The cost of a new engine expansion plug can be relatively high, especially for higher-end models or vehicles with complex cooling systems.

2. Installation Difficulty: Installing an engine expansion plug can be a complex process, requiring specialized tools and knowledge. It is recommended to have the part installed by a professional mechanic to ensure proper installation and function.

3. Potential for OEM vs Aftermarket: There may be a choice between OEM (original equipment manufacturer) and aftermarket engine expansion plugs. While aftermarket parts may be less expensive, they may not offer the same level of quality and performance as OEM parts.

Conclusion:

The decision to buy a GM 12855196 engine expansion plug ultimately depends on your specific circumstances, including the age and condition of your vehicle, your budget, and your level of mechanical expertise. While there are some drawbacks to consider, such as cost and installation difficulty, the benefits of improved engine performance, engine protection, and extended engine lifespan make it a worthwhile investment for many vehicle owners.

Recommendation:

If you are experiencing issues with your engine temperature or performance, it is recommended to consult with a professional mechanic to diagnose the issue and determine if replacing the engine expansion plug is the best course of action. They can provide you with a quote for the cost of the part and installation, as well as help you determine if an OEM or aftermarket part is the best option for your vehicle.

Details:

Changed my mind. High-value items are usually sent with signature-delivery requirements. Found a better price. See below for instructions.

12855196: Gm 12855196 engine expansion plug. Just didn't like it. If you do, our experts will hand-verify compatibility before shipping. Request a return.

Add details like I tried to install this part, and it didn't fit.

specifications engineblocksam:

  • brand: Gm
  • mpn: 12855196
  • part type: Engine Plug
  • genuine oem: Yes
  • manufacturer warranty: 1 Year
  • fitment type: Direct Replacement
  • fitment footnotes: Diesel;location-engine Block;30mm;vendor;

returns engineblocksam:

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

offer engineblocksam:

  • sold #: 22
  • options: ship-to-home
  • prices: $5.32–$31.73
  • item condition: New
  • in stock #: 5
  • started: march 12, 2025
  • availability: in stock

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

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  • type: fixed
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  • class: standard

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