MM-12561663 MICHIGAN MOTORSPORTS Coolant Port Plug Ls Engine

Review MICHIGAN MOTORSPORTS Motorsportsmm 12561663 Coolant Port Plug For Ls Engine Blocks 28mm Thread 17mm Replaces 12561663

Introducing the Michigan MM-12561663 Coolant Port Plug, specifically designed for LS engine blocks with a 28mm thread and a 17mm diameter. This coolant port plug is an essential component for maintaining the proper sealing of your engine cooling system.

Crafted from high-quality materials, this coolant port plug is built to withstand the rigors of high-performance applications. Its robust construction ensures a secure and reliable seal, preventing coolant leakage and helping to preserve the overall health of your engine.

The 28mm threaded design of this coolant port plug is a direct fit for LS engine blocks, ensuring easy and hassle-free installation. Once installed, the 17mm diameter plug seals the coolant port, preventing coolant from escaping and maintaining the optimal cooling system pressure.

In the event that you need to remove this coolant port plug for maintenance or engine work, it can be easily unscrewed using standard tools. However, the secure fit ensures that the plug remains in place even during the most demanding driving conditions.

The Michigan MM-12561663 Coolant Port Plug is an essential accessory for any LS engine builder or enthusiast. Whether you're working on a restoration project or building a high-performance engine, this coolant port plug is a must-have component to ensure the proper function and longevity of your cooling system.

In conclusion, the Michigan MM-12561663 Coolant Port Plug is a high-quality, reliable, and easy-to-install component that is essential for maintaining the cooling system of LS engine blocks. Its robust construction, precise fit, and secure seal make it an indispensable addition to any LS engine project.

The Michigan MM-12561663 coolant port plug is a component used in LS engine blocks to seal coolant passages with a 28mm thread and a 17mm opening. Here are some potential pros and cons of purchasing this part:

1. OEM Quality: This coolant port plug is manufactured by Michigan, a well-known automotive parts supplier. It is designed to be a direct replacement for the original equipment used in LS engine blocks.

2. Sealing Capability: The plug effectively seals the coolant port passage to prevent coolant leakage, ensuring optimal engine performance and cooling system efficiency.

3. Easy to Install: The plug is straightforward to install, making it a convenient option for DIY enthusiasts or professional mechanics.

1. Single Use: Coolant port plugs are typically considered single-use components, as they come in contact with coolant during engine operation. Over time, they may wear down, corrode, or develop leaks, necessitating replacement.

2. Cost: While the Michigan MM-12561663 coolant port plug is not excessively priced, it is still an additional expense for vehicle owners. It may be more cost-effective to replace a leaking plug only when it is no longer sealing effectively, rather than proactively replacing it.

In conclusion, the Michigan MM-12561663 coolant port plug is a reliable and effective solution for sealing coolant port passages in LS engine blocks. Its OEM quality and ease of installation are significant advantages. However, its single-use nature and cost could be considered potential drawbacks. Ultimately, the decision to purchase this part depends on the individual's specific needs, budget, and engine performance requirements.

If you require a high-performance or competition engine that demands optimal cooling system efficiency, it may be beneficial to proactively replace the coolant port plugs during routine engine maintenance. For standard use, it is generally more cost-effective to replace the plug only when it starts leaking or no longer seals effectively. In either case, the Michigan MM-12561663 coolant port plug is a proven and reliable option for LS engine blocks.

Details:

Commonly used when removing block heaters or oil coolers, to replace your original plug that has corroded. This bronze plug seals off the large opening coolant drain port on ls engines blocks. Replaces gm # 12561663. Fits 1997 -newer ls based engines 4.8l 5.3l 5.7l 6.0l 6.2l.

28mm x 1.25 thread, 17mm hex size. Applications include gasoline v8 model's.

specifications engineblocksam:

• brand: Michigan Motorsports
• mpn: Mm-12561663
• type: Coolant Block Plug

seller engineblocksam:

• rating: 99.7%
• city: niles, Michigan
• # reviews: 27210

payments engineblocksam:

• credit card: diners-club
• other
• wallet: paypal

shipping engineblocksam:

• carrier: usps
• type: fixed
• service: usps ground advantage, expedited
• transit: 2-6 days
• class: standard, expedited

general engineblocksam:

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

returns engineblocksam:

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

offer engineblocksam:

• started: november 12, 2025
• options: ship-to-home
• price: $16.99
• item condition: New
• sold #: 16
• availability: in stock