Just for the hell of it I called my local nissan dealers
(3 of them ) 2 said it was normal, probably due to the oil
not coming up from the pan as quick, the third told me to just
watch it for awhile and if it continues to bring it in and
they'll take a look at it, saying it might be a lifter sticking???(doubt it )
but none seemed to concerned about it and they haven't
heard of any problems like this before.......
I would say that if any of us get any results from anyone
we can just post them........
Found the Maxima.org thread:
"Many may have noticed a metal clank coming from the engine at cold start. Nissan is aware and says it is the timing chain before the tensioner takes up slack and before the upper 1/2 of the assembly becomes lubricated. They say it causes no harm.....I don't believe them. They have already offered to extend my powertrain warranty sight unseen. This is an interesting situation b/c this engine is used on the new 3.5 altima, the I-35, QX4, and Pathfinder. Nissan could have a problem with this engine."