Motor back together - strange noise????

[drudis]

Originally posted by DZEE'S LX

What's really strange is that the noise goes away as soon as I bring it up from 750 idle. I think I can hear the same type of noise coming from the passenger side at idle but I have to listen really close.

The noise seems to be loudest when the idle surges into it's "lumpiest" zone. In other words, roughest idle - loudest noise.
Dan

Sounds like roller lifter something...

At low rpm, the oil pressure is low. So you could have a roller hydraulic lifter not pumping up, and giving valve lash chatter.
Or it could be a _bad_ lifter not pumping up.
Or it could be the lash was not adjusted right in the first place.

Something in that area is my educated guess.
Does it go away (and STAY away) at 2000 rpm steady state?