Quote:
Originally posted by Kaiser:
It's lifter noise. This just happens with some of these motors. There is a TSB about it for my model year.

The guys at Nissan gave me the same line about the check valve in Nissan filters - but switching to them didn't make any difference. My current tactic is to ignore it.
I thought the same thing and after I changed it out myself I didnt really believe it. Just one solution of many. And no it may not be the cure all for the problem.