Okay, so I've been planning a cross-country road trip for several months. I know just kind of basic car repair things, definitely not a mechanic.
I got the car looked at, had brakes replaced, front right axle shaft replaced, tires balanced, oil changed.
I took a break after about 3 hours of driving. When I started the car again, I noticed a clicking noise. Popped the hood and it seemed to be coming from the engine. It got rapidly faster if I hit the accelerator. Oil level was fine and looked fine - there was oil kind of spread on top of the engine, which I was worried about at first, but mechanic later guessed that they just spilled a little when they changed it. This was yesterday in New England, so outside temps were above 90.
Took it to a shop - as I went faster, the clicking went away. They said it could be a variety of things inside the engine, but it might take 5 hours of digging into it to find out, and then it may be that there's nothing to be done, or it might just be something minor.
I drive home 3 hours, checking everything about halfway home. When I bring the car to a stop, no clicking, but when I start it up again, the clicking starts, but again, it goes away as I reach driving speed. Oil levels looked fine halfway home and all the way home.
They did suggest maybe a motor flush, to see if there's something gunking up the engine, something that could be done without getting in there and spending a bunch of money. I've read through some Nissan versa forums, and it seems like sometimes the clicking is no big deal, and people drive for 100K, and sometimes it gets louder and you're screwed.
So that's the deal with that issue - thanks for any insight on how to deal with that, if it's fine, or if i really just have to pony up and get someone to dig around in the engine.
edit - I just shot some video of the engine - no clicking, but this is what it currently sounds like:
Nissan Versa Engine Sound
Here's a different recording, I think the first one had some noise reduction: