29-08-2020, 08:03 PM
(This post was last modified: 29-08-2020, 08:04 PM by Tony Griffiths.)
Just had a couple of cylinder head core plugs start to leak badly which, considering they looked to be original, is hardly surprising. Here's what one looked like - wafer-thin and almost rusted through - against a new example. Of course, the replacements I had were too large, but earlier I'd been looking at a cylinder head where somebody had made their own, as brass plugs, rather crudely bashed-in. So, nothing to lose, I fired up the lathe and made a couple myself. Quite tricky to get the diameter right, but with a bit of fiddling - by putting the discs in the freezer for a couple of hours and running the engine to heat the head - the Goldilocks moment was achieved and both were driven in good and tight.