Six cold-callers. Nice table.

Flop:
Reflexively, I would have led in this situation, but, after thinking about it I think given your (bad) position and this board (4 outs to the nut str8) I think a check is the right play. I need to turn into a "thinking" player instead of "reflex" player.

The Turn:
Check/ raise??
Actually the King here is a mixed bag. Sure you have top pair but now your nut straight draw is cheapened and you are against 6 other players in bad position. Given all of the cold calling by loose players KJ, KT, AQ are all real possiblities. MP3 (since your have no read) could have a lot of hands including AA, KK, QQ, JJ, TT, JT (even if some like AA and KK are only remotely possible, you are against unknowns). I think you are still behind here. I don't even like your draws. A queen here likely splits the pot, a K loses to AQ, of course, but it turns KJ and KT into monsters, your best chances are with one of three Aces hitting and even that loses to some donk hanging on to something like QT, QJ, Q9. Still the pot is fairly large so I think you have to plan to either check/ call one bet and check /fold to two.

Still you did manage to knock out two players with the check/ raise. I think that is a good thing??

The River.
Bet?
With your unimproved top pair, I am not sure you have a value bet here. Even 89 beats you now. If you won this one I need to borrow some of your luck.

Am I weak-tight or what??