I don't know where to start, could someone tell me some procedures?
thank you!

 

Start with "22RE valve adjust" (or 3VZE) in the search field

That should yield a few results

 

thanks [:

 

or at least remind us which engine you are working on.

 

sorry ! im working on the 22R-E [x

 

you need to download the FSM or factory service manual and that will give you some info. do a search for it on hear or google it. i think the valve check info is in the tune up section. it's an easy job: valve cover comes off, rotate #1 to TDC, check valves, rotate #4 to TDC, check valves.