Has anybody experienced engine knock at start-up? It has happen three(3) times since purchasing the vehicle. Another iritation is the rocker arm noise at start-up, which eventually goes away once oil is adequately distributed to this area of the engine.

I've owned 2, 4 cylinder Nissan's and a V8 Titan and they all do it. Doesn't matter what time of year or what oil you use it's just one of those things that you do finally get use to.

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I haven't noticed the engine knock as yet....but, I did find that what I originally
thought was rocker arm noise at startup, was really the normal sequence of several
relays being activated in the first couple of seconds that the ignition switch is first
turned on.

I found that when I first turned the ignition switch to the "on" position without turning
the motor over, and just waited a couple seconds to allow these relays to activate,
then, when I actually started the motor, this "rocker arm noise" never happened.

..call me crazy, but this is my experience....I grew up in the muscle car days, tuned up
alot of cars in my day....so I do know what rocker arm noise sounds like...maybe I'm just
not hearing what you're hearing?? Whatchathink?

I Had The Same Noise, Sounds Like Dry Start Everytime The Car Sit For 15-20 Minutes. I Took It To The Dealer And The Service Writer Heard The Noise And He Was Going To Research It (check Tsb Or Recalls).

Yes, I get the rocker noise at start up. Which like you said goes away after a few 10-20 seconds. I have not been through a winter yet and hope it doesn't get real load as it gets colder (and older). My Rogue only has 5K miles and it's done this from day one. It's one of those things I guess I'll live with ?