Unscrewed and removed 3 injectors in 15 minutes and the last screw on the fourth injector decided to hang on to its dear life, tried leaving it for an hour with WD40, but in the end it just sheared itself.

What are my options please ?

 

Sorry, by sheared i mean stripped, this is what it looks like

 

Has the head sheared itself off or has the + in the top of the screw rounded?

If the head is gone you will have to drill out the thread and then use an insert like a helicoil for a new thread for another screw to go into.

 

So you have the screw out then? I can't really tell from the picture but looks like head of the screw is just mashed... ?

 

Sorry for not explaining this properly, let me try this again -

The screw is still in.

The head of the screw is intact, but the inside + has been rounded off, it looks like in the picture above, but the picture is not of my actual screw.

 

Can i take the fuel rail off with the injector still inside it for the ease of drilling ?