Finally, got my 5.9 Dart to the track. It went well, then it went to hell.

I was just about to post that it could be a tight guide... then I saw how old the thread was.my black dodge truck did the same thing and that's what it was...poped one push rod out but didn't bend it.

I hit the valve a few times with a soft hammer,put it all back together and it never did it again.it was a roller la 318 with a .525 cam.

that dart was a kick *** car btw.