What has the mechanic already tried to do so far? Did he double check that all the replacement freeze plugs had the correct part numbers? Clean the area real well and look closely at the engine plug hole to be sure there are no small cracks. JB Weld would likely correct any of these. If all looks smooth you could try putting the Ultra-Copper gasket sealer on the edge of the new core plug: not much, just a light coating, and let it set up a day before adding antifreeze. Gary H. -----Original Message----- >Need some help, folks: Mechanic rebuilding my wife's 1964 Dodge 318 >engine is having some problems getting one of the engine block freeze >plugs to stop leaking. Any ideas? ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.