Posts Tagged 'COOLING SYSTEM – Welsh plugs'

COOLING SYSTEM – Welsh plugs

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PURPOSE
Welsh plugs are part of the engine block and the head.  When the engine block and head are manufactured, part of the casting process is that these parts have the welsh plugs fitted where the machines are able to enter and then when the casting is finished a welsh plug is fitted to seal off the cooling or oil system.

THINGS TO LOOK FOR
Welsh plugs can leak at normal operating temperature.  When this happens, stop the engine and get ...

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