I have 2 of 5 glow plugs working and the bad three have swollen ends and won't come out. I can back them out past the threads but the tips are to fat to pull thru. My plan is to get started , heat up engine.. And bad plugs, then try getting bad plugs out when they are hot. Good plan?. The trouble is I can't get engine started. It hits and fires a little but just won't run . should I be able to start with 2 glow plugs?, any ideas how to get those other cylinders going? Mike