not strictly just for the boxer engines, but thought that might get it through the net and stay on here
most of you guys will know how to change a core plug, others may not and view it as more trouble than it's worth.
it's a pretty straight forward process with the engine block sat on the workbench, access can be an issue if still on the car.
that's why i always change them whenever the chance presents itself. for the sake of a few quid it does away with a potential leak in the future
1st pic is the basic tools that you will need, nothing more fancy than a hammer, screwdriver (well used one, not your best) a parallel punch & a pair of molegrips.
a parallel punch MUST be used, not a dot punch, as will become clear
2nd pic shows the parallel punch lined up in the centre of the old core plug, give a few sharp taps with the hammer to dent in the centre until it just moves slightly down
3rd pic shows the dent in the core plug and the breaks in the outer edges where the sides have been pulled in. it's vital that the parallel punch is used as it then pulls in the sides of the plug releasing it from the block.
4th pic shows the next step of tapping one side of the core plug to twist it in the opening, should go round pretty easily.
next steps to follow..........