Kohler K-34-39 leaks

SOURCE: Leak at water supply entry into tank - Kohler Santa Rosa

Tighten the nut a quarter turn.  If that doesn't do it then shut off the water supply. Unscrew the nut and get you a new rubber washer to replace the old one.  If that doesn't do it, then go to the blue or orange box store and get you a new 12" stainless steel flex line for toilets.  Bring your old supply line in to correctly match up the size so you don't have to make 2 trips if you buy the wrong one.

SOURCE: kohler one-piece lowboy..rialto? leaks from suply below tank

No, tsolder is absolutly right about everything he says. I am not as daring as he is so I will be paying big $$ for the parts..

SOURCE: After flushing my Kohler 3386

sometimes removing the 3 or 4 screws that hold the top of assemble and separating the assemble will dislodge debri..and adjust the seat so that the water comes out of the small tube into the overflow tube like it should.

SOURCE: Kohler santa rosa fills, shuts off, a little water leaks from tank, toilet refills and repeats the leakage into the drain.

There is a rubber seal at the bottom of the flush valve that covers the openning at the bottom of the tank. If this rubber seal has perished slightly then it will leak water into the toilet bowl. This rubber seal need to be replaced to form a proper seal to prevent water leak.

SOURCE: kohler one piece toilet. it is leaking around the bottom of the toilet but if I put the water in the back of the tank myself, it doesn't leak

if its leaking from bottom of toilet on the floor. its the wax ring that may be bad, if it does this when flushing it is either cracked or the wax ring under toilet is bad.