[JSeery]

As the valve and lifter expand it is going to decrease the clearance. No idea what the real number is, but using the same numbers posted in this thread if the clearance was set at .010 on the intake cold and hot it expanded .002 the clearance would now be .008. As the valve and lifter expand the clearance decreases.

On an OHV engine it is a totally different thing. You have a lifter, a push rod, a rocker arm and then a valve stem. All of these components are going to expand and it is going to be more expansion than just a lifter and a valve stem in a flathead. OHV procedures are not going to transfer well to flatheads in the valve train area.

"Sorry to bring up an old thread but I'm trying to set my valve lash and it calls for 10-12 hot."

Now why would anyone provide flathead cam numbers in Hot vs Cold? Where is the cam from and why hot valve lash number??