Toilets, Sinks, Showers, Tubs and Disposals - Yet another broken toilet flange question

My toilet was very wobbly, and when I removed it I discovered the old plastic flange was cracked on both sides where the bolts slide in. It feeds into a PVC pipe.

I picked up a metal flange replacement, that theoretically would fit over the old one.

Problem is that I can't remove the bolts on the old one. Of the four, one just spins, one won't budge, and two are so gunk covered (from the wax ring?) I can't even find the heads.

Am I going to need to call a plumber out for this?

I did a search on this forum, and I didn't come across anything exact.
Any help would be appreciated......

thx

The slots for the toilet bolts are usually slotted so you have some play with them. Spin the new flange slightly, making sure the bolts will still line up with the center of the flange, and drill some new holes through the plastic flange where the new flange lines up. Then install new screws.

The slots for the toilet bolts are usually slotted so you have some play with them. Spin the new flange slightly, making sure the bolts will still line up with the center of the flange, and drill some new holes through the plastic flange where the new flange lines up. Then install new screws.

Thanks! Excuse my additional non-handyman questions...

So I can just drill new holes into the old flange? Is there a standard size screw I should pick up (I always have trouble with that).

What are those screws anchored into underneath?

A stainless would be the best, but you can use just about any screw. Unless there is a leak, it will take a long time for it to rot.
I usually just use sheet rock screws, but if you have something a little larger, that would be OK also. A flay head screw is best and about 2" long would be good. Look into the pipe and be careful screwing in the direction of the pipe flow. Use a shorter screw there.