Originally Posted by
Andy
i did this....
Knocked a + shape in centre,got a crap +screwdriver to indent the centre,then blasted it with a centre punch,removed then to fit....
Clean up with emery paper,then blue seal the new core plug then press by hand into the hole.Tap in a + shape(ie top,bottom,left,right around it,NOT in the face of it!) with a mallet then fit a 24/28mm impact socket over it (ie to mate with the diameter face) and hit it home with a hammer til its flush with the face of the block.Done.