How do I get the old toilet seat fastener bolts out of the holes? I have a replacement seat but I can not figure how to get the old bolts out of the toilet. There is no access to the bottom side of the bolt where a nut should be.

There has to be either a nut and washer under the toilet, or if its reversed a bolt head with a washer under it holding it down. To remove it you can either use a hacksaw blade between the bowl and the bottom of the seat. Or use a dremel tool to slowly cut away the metal rod, etc., from the top. If using hacksaw put down some masking tape on the bowl so you don't scar up the enamel surfacr of the bowl. Work slowly and you will eventulaly cut through it.

If you are trying to install a standard toilet seat on a special "smooth sides" toilet, it likely will not work. Most hidden bolt toilets come with a special seat because you cannot get to anything from below. This special seat has a set of expanding style bolts that are attached to the screw that is part of the seat. The plastic expanding bolt goes into the hole(s) on the toilet, and as you tighten the screw on the toilet seat bolts, they expand the plastic part in the hole of the ceramic toilet.

Never heard of such a thing. You'd better contact Kohler on this one, bro. . .

I just had the same problem.I can not believe that kohler would design such a flaw. I have four of these toilets in my house,and it would be ridiculously expensive to replace, especially for a seat. To fix it I went to OSH and got some 1/4-20 T nuts, went home cut the bolts off the seat (multi master dremel) with metal cutting blade. With a screw driver tapped the bolt and the small area around the bolt down into the toilet area. Now you have just a porcelain hole. Clean area with solvent (lacquer thinner),get some gel type super glue from hobby shop and put it on inside and top edge of the hole on the toilet. Put some glue around the shaft and under side of the T nut and slip it into the hole.Then put a SMALL bead of glue around where the T nut makes contact with toilet and let it dry aprox 1/2 hour. Now you have a permanent fix.To prevent a problem getting the bolt out in the future,put some anti seize (auto part store) on the threads of the new bolts. Hope this helps.
Good luck
Max

These bolt covers usually come with the seats as one piece. You can also purchase generic bolt covers at your local hardware shop but it will look a little different.

the flaps covering the bolts?? if they are broken, just use a little dab of superglue. make sure the toilet bolts are tight before glueing.

don't go crazy with the glue, just a little dab on each side to hold down the flap

Whether the bolts are nylon or brass, they all come loose after a while. The culprit is oversize holes in the china bowl. To solve the problem, go to the auto parts store and buy a short length of fuel hose, just large enough to slip over the toilet seat bolt. Cut two short pieces of hose off -- about 1/4 inch each -- with a sharp bread knife or utility knife. Fit the pieces of hose into the toilet seat mounting holes in the bowl. If the hose is too large, snip a small segment out of it to make it into a "C" shape, just large enough that the cut ends touch when inserted into the mounting holes. Install the seat as usual and snug up the nuts.

Once movement of the seat is prevented, the bolts tend to stay tight. I've performed this trick on a number of my own and friends' toilet seats and they've stayed put for 8-10 years with no signs of loosening, yet can be removed easily for maintenance and cleaning.

Use fuel hose, as it is durable and does not deteriorate with exposure to air. This trick won't work with electrical tape, duct tape or masking tape, as those materials are too soft and the adhesive cold-flows under pressure.

I have the same low boy where the bolts are inside the hollow body of the toilet. I called Kohler customer service and was told to use brute force to yank the toilet seat out. My husband suggested using a saw to cut the bolt but he hasn't done it yet. He wants to replace all our Kohler low boys which constantly leak becos of poor design of handle and flapper. The handle pulls the flapper slightly to the side when you flush. And the flapper lip being a tiny bit too small, if it doesn't sit just right, the toilet leaks. We've replaced one already with a Toto and love it. Too bad that Kohler isn't trying to fix the problem as I see many many online posts with the same problem and recommendation to replace the Kohler with Toto or somethng else.

If your problem is like mine your toilet seat is loose and swivels when you sit on it. If you try to tighten down the screw it won't tighten. Use instructions above to remove old hardware.

To fix with new hardware

Purchase Hilti brand 3/16" x 2-1/2" Toggler Brand Toggle Bolt (Home Depot sells the kit). Kit comes with 10. You will only need 2. My last repair lasted about 8 years (with new kit = 40 years left or the purchase of a new toilet - whichever comes first). Set comes with 3/16 flat head screws. I recommend purchasing 3/16" 2" round head screws with matching flat washers. Sink Metal Toggler into hole with toggler pointing straight up (it's attached by long plastic legs). As it goes in the hole it opens up. Pull up on the plastic pull rings as tight as you can until the toggler is tight up against the inner porcelain of the bowl (similar to tightening cable ties). Line the seat up with the holes and it's new plastic adapter (that won't slip into the hole courtesy of Hilti). Slide washer underneath round head screw but on top of toilet seat assembly and screw directly into the newly installed toggler which is sunk in bowl/abyss receptacle. Repair should take around 5 minutes.