Originally Posted by ap72
Not enough preload, if you set the prelaod with a cold enigne it reduces when the engine warms up- hence the difference between hot and cold lash on a solid tappet engine.
I would have thought that the preload would increase on warm up due to expansion of push rods an other connected components? The noise I am experiencing actually decreases when I set the rockers 1/4 turn past zero rather than 3/4 or 1 full turn. Just me thinking out loud but if the XE cams ramp rate is such that it is setting down the valves very quickly as well as opening them quickly then on closing with less preload the hyd lifter would have a better chance of providing some cushioning. That is why my chatter decreases with less preload?