Pushrod oiling - do I need it?

rmchrgr said

I looked down the cylinder head bolt hole next to the rocker shaft stand with the oil feed and I see the two holes in the stud bore. I did not realize that bolt hole was exposed to pressurized oil from the gallery, my apologies.

Regardless - what exactly does the trough do? Is it just to allow a little extra oil? It's not a lot of oil but does it affect pressure? What happens when the engine is not running, that little bit of extra oil has to go somewhere?

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The recess cut into the stud lines up with the oil holes in the block and head. That is the reason for indexing the stud then marking it for the recess. When reinstalling the stud the recess should be put in the correct location.

If the stud is 1/2 inch in Diameter and the hole is 1/2 inch in Diameter , There is not room for oil to travel up to the head for rocker shaft oiling between the stud and the hole. And " No " the stud does not weaken with the recess,

We over torqued it when first doing this and no torque issues or stretching were seen. Oil at the rockers was greatly improved. Make sure you do this recess with a Ball end mill on a mill so not to deform the stud while keeping a consistent depth, width, and transition

My son builds a lot of LA small blocks and this is done to everyone he assembles with head studs