- freeze plug
- A removable plug on the block which can pop out should the coolant in the block freezes and expands. See expansion plug. The British term is "core plug."
Dictionary of automotive terms. 2015.
freeze plug
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Freeze plug — is a misnomer for core plug or expansion plug, and is commonly referred to as a frost plug. They are a subset of the plugs on a car engine cylinder block or cylinder head. The traditional plug is a thin, domed, disc of metal which fits into a… … Wikipedia
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Core plug — A core plug that has been corroded from improper engine maintenance. Core plugs, sometimes wrongly called freeze plugs or frost plugs, are plugs that fill the core holes found on water cooled internal combustion engines. The sand casting cores… … Wikipedia
core hole plug — See core plug freeze plug … Dictionary of automotive terms
expansion plug — A steel plug, slightly dished or cup shaped. When driven into place it flattens to fit tightly in its seat. In an engine block, expansion plugs (also called freeze plugs or core hole plugs) are inserted into the holes in the casting through which … Dictionary of automotive terms
core plug — A metal plug located in the sides of the engine block which can pop out because of excessive pressure or freezing and prevent the engine block from cracking. These plugs are located in the water jacket and can sometimes leak and should then be… … Dictionary of automotive terms
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