The dreaded Iowa tractor that was stuck...So when I bought the tractor the po told me that he thought it had a stuck valve..after it was delivered I again spoke to him and he said a mechanic said burnt valve..tractor is lacking power..however not as much after turning the distributor. But so more pressing issues...seems to have a slight knock somewhere..now it had a loader on it and the loader pulley wobbles. I do remember when I was pulling on the fan belt that it appeared to just graze the timing cover. Could this be the source of the knock? Knock increases with speed. Not a loud knock. 2nd..after running it awhile yesterday (ran like crap) I noticed oil seeping out #2 and #3 spark plug holes...with the plugs in and the engine running. I have not done a compression test on it nor have I removed the valve covers...It also took a bit to run on all 4 cylinders and maybe it didn't continue to run on all 4 causing it to sound like crap. Will sticking valves cause the oil issue? It holds 20lbs pressure hot. Im running #'s through my head to determine what to do with the engine.