Is there an adjustment for hood heigth (at the front)?
My old camry had a rubber thingy on each side that screwed up and down.
My 99 I30 does not seem to have the same - hood looks a little low compared to the fender and when I push on the center of the hood I get a rattle.

How to tighten it up?

 

Take out the bolts and put in washers to increase the height. I got longer bolts and used a 3/4" nut as a washer to lift mine up to allow more air in the engine compartment. They actually sell a kit to do this but I am too cheap.

 

So it cools your engine compartment? Intereasting, never heard of that b4.