Re: 1948 288 expansion /freeze plugs

Posted by Owen_Dyneto On 2009/9/9 9:22:55

Your core or welch (freeze-out plugs is really a misnomer) aren't copper, they are plated steel, of the cup type (not the disc type) and should be easily found at a good auto parts store. Sorry I don't recall the size but we picked them up last year for a 288 engine off the shelf at a local store.

BTW, if your indications of overheating are based on the temperature gauge in the car, have you checked it against a good quality thermometer?

EDIT - the 48-54 parts book lists the expansion plug as 2 inches.