I noticed a weeping spot on the coolant passage through the J10 Timing cover. Pressing lightly with a screwdriver popped a hole..
This happened before on the opposite passage. Like before,I don' t want to change the whole timing cover assembly yet, so I used a piece of aluminium sheet, small nut and bolt and epoxy resin. The first repair has been there for a couple of years now, so I'm quite confident the new repair will last until I find time to change the engine(whenever).