Kohler single knob bath faucet repair
 

Trying to fix a leaky Kohler single knob bath faucet. Took everything apart and replaced the four o-rings I found but still hear water running sounds and little bit of water coming from the spout. Is anyone familiar with this type of repair?

Appreciate any feedback.

Thanks,

Replace the whole cartridge
 

Is it a mixing valve cartridge model?
Went through the same thing last week with my DELTA single handle shower valve. The $3 fix is what you did in replacing o rings and seals. If it still leaks, then it is time for the $40 fix and replace the whole inner cartridge.
I found my DELTA cartridge at the local hardware, surely you can find what you need there for your KOHLER.

Best if you have the model number with you, LOWES has a catalogue on site where you can match part numbers. Try this web URL.
Kohler: mixing valve : Search results

Good luck.