Hello all
I have been Re-doing the lifters preload and after researching the zero lash, i have found a couple of lifters which show resistance when i going to add the 1/2 turn preload.
On the others,the adjusting screw turns very loose when i,m adding the preload.

The cam and lifters are new(Lunati).
I,m using the up and down pushrod method for the zero lash and adjusting the intake when exhaust starts to open and exhaust when intake is fully open.

Is it usual that some lifters keep the pressure?The engine has not been running for a couple of weeks..