Are those guys the 'fast bleed down' type? If they are, what you hear might be 'normal'...... Rhoades lifters did that as well.

 

I don't really know. I thought they were a fairly standard type, figured Mopar branded would be a safe bet as the other set i found were the same price. How would I tell and why would anyone want a faster bleed down?

 

I always wondered that as well...... I *think* it was for folks that ran really lumpy cams, so at idle it would give as much lift. (lower oil pressure..)

One would think the mopar fellers would be good.... Might be tempted to check pushrod length, or readjust the valves again.

 

Mine seemed really loud to, to me, before I put in the roller rockers and that made it a ton quieter. You reminded me of that when you described the sound coming from the whole valve train. That's how I remember it, just everywhere under the valve covers.

But it seems like mine also gets a little louder during cold starts whenever I've tried anything other than the exact recommended oil viscosity.

 

I don't think roller rockers are in my trucks future $$$ wise, I feel like those would more mask the symptoms than actually being the issue. I noticed a slight improvement going from 10-30 to 5-30 but probably shouldn't go any thinner.

 

Google has lot of answers, like this: