[gtofreek]

Originally Posted by i82much

i have the new comps on the OF cam. it did not take long for my top end to see oil the first time i primed the engine, and my lifters are not noisy. perhaps the ia2 galleys are in a different place?

on the other hand, it seems like you might be able to get enough oil in the lifter even if the band does not see the oil galley on the base circle. you still get oil in the way up and in the way down, the question is can you meter it so that is enough to keep the lifter from collapsing?


what kind of spring pressure are you running?

This is not the case. When the lifter is opening the valve, the oil is slowly bleeding out of it. When the lifter rests on the base circle, this is when it has to refill, but there is not enough volume getting between the lifter body, and the lifter bore to completely refill it before it takes another hit. This is why the oil band has to be exposed to the oil hole on the base circle. It's the only way it can get enough volume.

When you are just cranking the engine with the starter, it is turning over slow enough that the lifters fill, and are quiet when first started. But as it runs, it slowly bleeds the oil out of it, but can't refill it fast enough so they get noisier and noisier, until after a minute or two, they are really noisy. Shut it off, and crank it over again, and its' quite again for a minute or so.