It is belt 3.1 TD isuzu MU
the engine works not so smooth lacks power and knocks a bit. I wanted to try and adjust timing a bit.
After I loosened three bolts that hold the pump in place I couldn't turn the pump at all. It seized rock solid to the mount and won't move. I've tried WD40 and some other penetrating lubes and still no movement...?!
I thought there should be some sort of adjustment bolt to adjust timing but can't figure out which one is it. Am I missing something?