Yeah dude, get a new helmet. If you're playing contact hockey this is a no brainer, but even if you arn't, you never know when something unfortunate is going to happen, and you need that helmet to be able to absorb a potentially catastrophic impact.
I wear a NBH 4500. Love it, and it saved me from serious injury a few times.
Skated over the blue line, toe dragged around one defender, cut through him and tried to go outside in on the next defender. Got through him ok, but he lost his balance (and his jock strap to the rafters) and his skate caught me in the ankle and I did a whole pirouette and smacked my head on the ice.
I felt fine but the referee would not let me back on the ice until I took some time to rest on the bench.
I realize every bit make be the difference in an extreme case, but somehow I truely believe that the fact they are adjustable makes them inheritantly not very solid to start with.
I am a true believer in protection in hockey. But hockey helmets... except a few one piece designs, they are all a bit flimsy.
As for motocycle and autoracing helmets, now those are made solid. But you would be kinda out of place on the ice with those.
Not too mention they are quite a bit heavier than a hockey helmet. That would be a lot to lug around on the ice
A crack renders the CSA certification void, and depending on whether or not your league is sanctioned, a cracked helmet is illegal to wear. If you're playing sanctioned hockey, a referee cannot let you play with it if he or his linesmen sees the crack.
Do I need to buy a new one? I've got these cracks on both sides of the helmet.
I actually have the same cracks on mine. Just noticed it during the last game of this past season. I was trying to think of where I might have cracked it, and it turns out that there was a hit from the season prior where I took an elbow from a player who towered over me(he was about 6'4-6'6 off skates and I'm 5'7 on a good day) who was cutting in towards the net. I thought he was gonna stay outside but he made his move inside and caught me right above the temple as he went around me.
If it's not from that, then I don't know what it's from.