Engines and Components› Oiling Systems

Melling

Expansion Plug

$0.45

SKU: M00L MPC-212A

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Overview

The Melling MPC-212A is a steel engine expansion plug designed to seal casting core holes in engine blocks and heads. It helps protect against cracks caused by frozen coolant and ensures vital fluids remain in the engine. This plug is made in the USA and meets or exceeds original equipment specifications.
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Part #: MPC-212A

Made In USA. Melling expansion & freeze plugs provide an economical way to supply plug requirements to complete your engine rebuilds. Melling offers boxes of 10 plugs or 25 plugs for engine builders who require specific plugs in large quantities. Each bulk pack contains high quality expansion/freeze plugs needed in specific dimensions to complete the job. Melling expansion/freeze plug are available in either steel or brass depending on engine usage and customer preference.

Features:

  • Precision engineered for optimum fit and function
  • Manufactured from high quality materials for consistent durable wear
  • Designed for long-life and worry-free performance
  • Meets or exceeds original equipment specifications

Stock Replacement Expansion Plug

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandMelling
Part NumberM00L MPC-212A

Videos

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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