FWIW, I had this happen on a new engine also. An oil change revealed the
internals of the oil filter had collapsed.The lifter noise has not
returned since.
Ken

On Sun, February 3, 2013 12:08 pm, John Goubeaux wrote:
> Howdy Folks,
>
> I've  got a 2.2 GoWesty engine that has roughly 6K miles on it. It's
> running fine -but because I am not driving it a lot, it can sit for a
> week or more before I fire it up and drive it, the valve lifters have
> clacked on several occasions while the engine is cold. After several
> miles and higher RPMs the noise eventually goes away. I've seen this on
> older Waterboxer engines I have had ( with lots of miles on them), BUT
> the question is: Is this something to worry about at all given it's a
> new engine OR b/c it often sits for longer periods IS this normal ?
>
> -john
>
>