On your 98 NA motor you have one plastic coolant elbow entering the LIM. If this is leaking you should be able to see it.
The lower elbow is metal and part of the tensioner assembly. If this is leaking it should appear as a leak above and left of the water pump.
The bolts that hold the timing cover on, only go into the block. They do penetrate the cooling jacket. Just block though, not heads. If your leak is coming from under the water pump pulley area, that'* almost positively a water pump. Holler if you need a how to on doing it. The bracket can be fun.
Timing cover. Hole to left is where the lower coolant elbow enters. Hole under WP is the weep hole