I did a search but didn't find anything...
I'm new to the group and to the charms of the Xterra and was wondering if it's normal on cold/cool startup to hear a slight "clatter" for about 2-3 seconds?? Thanks in advance for any feedback..

Yes; the Xterra has hydraulic lifters and it takes a second or two for oil to get pumped up to them on cold starts.

If you search the problems and annoyances section...you will find more than you need on that subject.
-cbx

Thanks for the responses..should have dug a little deeper.

My other car is a 97 Miata and their engine is famous for this kind of valve train noise on startup and sometimes after a really hard, high rpm flogging.

There have been a million different answers for this passed around, but in my experience there are a few tricks that should apply to the Nissan as well.

1. Use an OEM oil filter with an anti-drain back valve and when changing it, pre fill the filter with oil.

2. Use a high quality oil, I normal use M1 synth in mine.

3. Do an engine flush every 3 or 4 oil changes. I have been using Gunk brand, but I have heard good things about Marvel Mystery Oil as well. You will be amazed at how nasty your oil will look after doing this.

If I follow the above, I never get valve clatter except when starting the car after it has sat for a week or so and it is only for 1-2 seconds. Looking at my oil pressure gauge, the second it comes up to good pressure, the lifters become quiet.

Hope this helps,
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