rebuilt 2.3 valvetrain knock

[jkl1q]

I have just finished rebuilding a 87 2.3l, new piston rings and all bearings. I just put it and and it fired up first try. The only problem is there is a knock sound from the valve train. Its not very loud but its noticable. Any ideas what this could be from?? Thanks

 

[RangerFabWorks]

maybe the lifters are outta adjustment?

 

[scotts90ranger]

they are hydraulic lifters, so if they weren't replaced, one could be collapsed

they are like $7 a piece, so it's not a bad thing to replace, not particularly hard either once you figure it out...

 

[jkl1q]

there are no adjustments in the valves or lifters... it turns out i had low oil pressure as the pump must not have primed... i got oil pressure now and the knocking stoped. Thanks for the input tho