03-01-2021, 11:05 PM
What Tony said.
Cracks around there are very common though they are usually just visible as hairlines, I wonder how tight that stud was done up.
They seem to have already progressed as far as they are able to.
Where exactly was the water coming from? Sounds like your head is also not flat.
I'm not a big fan of skimming but I'd certainly check it and if necessary lap it flat and only skim it if that's not enough.
With alloy heads it's important not only to follow the correct nut tightening sequence / torque but also to re-tighten them (COLD) after the engine has first run up to temperature.
Cracks around there are very common though they are usually just visible as hairlines, I wonder how tight that stud was done up.
They seem to have already progressed as far as they are able to.
Where exactly was the water coming from? Sounds like your head is also not flat.
I'm not a big fan of skimming but I'd certainly check it and if necessary lap it flat and only skim it if that's not enough.
With alloy heads it's important not only to follow the correct nut tightening sequence / torque but also to re-tighten them (COLD) after the engine has first run up to temperature.