2001 model, brief knocking when accelerating, is it normal??

[gabrielg74]

Hello, I am new in these forums and have a question I could not find an aswer for doing search.I have a Pathfinder 2001(early) LE with the 3.5 engine, and sometimes when I accelerate I can hear an engine knock briefly, does this in D and Reverse, but only sometimes, and specially when accelerating hard.What I found interesting is that in the manual it says this is NORMAL!!!Actually it is hard for me to believe, so I wanted to confirm with you if I am crazy and the manual is right???I believe any kind of knocking is harmful for the engine.

Any light you can shed on this topic will be greatly appreciated.

TIA,

Gabriel

[SVTCOBRA]

What octane are you feeding it? I noticed our 2003 LE knocked with 87, so we always ran the middle grade in it and it quit. I run middle grade in my 2001 SE and don't hear anything. If I did, I would switch to prem.I don't like ANY knocking, but that's just me.