587628 - Core Plug

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Core Plug for the engine casting. Core plugs seal the core holes left in the cylinder block after the casting sand is removed during manufacture. Once fitted, the plug closes the p assage against the water jacket. It also acts as a frost plug, intended to be pushed out by the expansion of freezing coolant to relieve pressure and help protect the block from freeze damage. Diameter: 1 3/4 inch (44.5 mm). Show more