Quote:
Originally Posted by Hotfingrs
It's been a long time since I used iron heads, but if I remember it's the opposite of aluminum heads. Lash gets smaller with iron heads when they heat up. In either case you don't want zero lash when hot.
|
Iron/iron combos don't change much at all.
But the point is, on a solid cam, you don't want the operating lash at zero. Keep in mind that I said operating lash, because there are some special conditions (all aluminum stuff with tight lash cams, or hydraulic roller cams running solid roller lifters , etc.) where you have to set the cold lash at zero or near zero. When you get to that point, sometimes you have to preheat the engine before firing.