[twinturbo]

Engineers steel ruler is the way to check for head warping, however it would still have to be quite bad for POURING water. The water is under atmospheric pressure and gravity, it is not being pushed past any obstical.

You may have some luck if you take the cam cover off and Identify the oil gallery that returns from the head to the block (the one used during filling) Stick a torch over it ( or use a long swab ) and see if you can see water flowing or water residue.

I think, that unless you can find something obvious, the head will have to come off to Identify the route the leak. is taking. and then reversing the direction to see the source.

TT