Re: V8 Cylinder head questions

Posted by Jack Vines On 2014/9/25 11:34:31

The hydraulic lifters have .250" travel, so they won't usually be the the problem.

As mentioned, if the seats are cut and the valves are refaced, then the net assembled result can be too little spring pressure. The spring height measurement is just a way for the guy on the assembly bench to make sure he's putting back in enough spring pressure.

If several shims are required, then sometimes it's necessary to grind the valve tip to get stem height correct. But that doesn't take into account if the camshaft lobes and/or rocker tips have been reground, block and/or heads decked. It's a multi-variable regression analysis.

jack vines