That was done at the time the heads were received by my engine builder. The weird thing is if you fill the combustion chamber with alcohol the valves do not leak a drop. I am worried that the valve seats are leaking under pressure. I am baffled by the valves leaking and the cylinder to head loint leaking when everything is square, flat and parallel. I may wind up buying a set of LE200 heads and waiting until March to get them.