?? Valve Lashing 273 ??
Gap actually grow as it gets hot.
If the gap grows as they get hot then you would be able to set them at zero, or near zero, cold.
Here is what my auto mechanics text says about valve clearance....
"This is necessary as engine heat will expand and lengthen the valve stem to such a degree that the valve would not close, with the further result that the combustible charge in the cylinder would not be compressed."
As to hydraulic lifters, it says....
"When valve linkage expands due to engine temperature increases, the plunger must move to a slightly lower position in the lifter body to assure full closing of the engine valve. Similarly, when engine temperature drops, the plunger must move to a slightly higher position."
