Do i have a big problem???

LowDart said
That's it Rumblefish,it's the tab that broke, and take the timing cover out to weld is something i don't want to do now .Do you think i can drive for one month (short distance) every day with that car without have problems ?I'm trying to find another timing cover.
Yes I do. Just lay a thick beed of sealent around the outside of the cover after you tighten it down.

Replace as soon as possible. No sense pushing the limits to found broken down on the road.