Today, in my infinite wisdom and against all prudent judgement, I decided to replace injector number 3 this afternoon. This exercise is nothing new to me. I've done this two more times already.
So I get busy and then I managed to snap the ASA bolt that holds the injector bracket:
I as able to make 2 complete turns of the bolt before it snapped off.
So this is a pretty messed up situation right now as cylinders 3 and 4 will have no compression at all. This means I can't drive the car.
My suspicion is that in the cold weather (4 degrees Centigrade) there was enough difference in contraction between the aluminium head and the steel ASA bolt. The bolt probably decided to dig in the head and carve a new thread in it. Then it got stuck and then I snapped it off.
Suggestions, opinions and ideas are highly appreciated at this point.