There's nothing left to grab looks like only the electrode..ism wondering maybe I can weld a nut on some metal? If enough leftI would spray some lube on each one for several running cycles the hot and cooling might let the lube work in a little better. I think also it might be a pain trying to work on a hot engine but I think I would try right after a shut down. use a never sieze compound when installing the new ones. 300 hours and it is out of warranty??? and the glow plugs are rotted too?????????? but I have read some where that water drains over them on the new holland and causes this.