The balance chain tensioner has a ratchet inside so as long as you cant push it in to far you should be fine, have a look at my thread
failed balance chain tensioner
Theres 2 videos on there , 1 shows it not working and 1 brand new working great.
I think you push on the timing chain tensioner on a hard surface untill it clicks and engages. But im not 100% sure. Have a look on the forum(its got to be here somewhere hahah)