The Core Plugs

So I took the time to remove a couple of the core plugs today, just for a bit of a look see and it is now clear why they are leaking. If you look carefully at the pictures you will be able to see that the holes are no longer round and the seating face has deteriorated, probably as a result of having to coolant in. I will have to get these machined round to the next size up and have some new plugs fitted.