1957 955 injector

Pre-combustion chamber has come apart at seam (happens occasionally). About the only way I know of getting the remaining piece out is to weld something to the remainder that will withstand the 200 + ft-lb torque to get it out.

Its broken off just above the thread so there won't be any torque on it and in theory should be loose, but corrosion will be holing it in, try and clean round the area and give it a dose of your favourite penetrating fluid, using a flat end punch, give it a couple of blows with a 2lb hammer, being careful not to get too close to the thread, then carefully try and 'easy out' stud extractor to remove it,. You may have to weld something on it but I'm not sure how to do it in such a small space.

I was able to get one out of a D2 with a big easy out.

Ok, looking again it does seem broken at the thread neck, not the chamber joint. If an extractor doesn't work, plug the hole and weld a nut (inside nut thread) to the remainder. Half the help comes from the heating and cooling of the weld.

Couple of heat and cool cycles with the gas torch will shrink it and greatly assist with the extraction

Pre-combustion chamber has come apart at seam (happens occasionally). About the only way I know of getting the remaining piece out is to weld something to the remainder that will withstand the 200 + ft-lb torque to get it out.

So once I can this out I will need to buy a pre combustion chamber, do you think I should replace anything else in this area while I'm in there. Thanks to all for the replys, will be alittle while before I will be able to work on it. spun the engine over by hand to clean water out of cylinder. did spray some wd 40 down in to it.

I'd squirt some engine oil down there and not let it set to long without rolling the engine over.

Pre-combustion chamber has come apart at seam (happens occasionally). About the only way I know of getting the remaining piece out is to weld something to the remainder that will withstand the 200 + ft-lb torque to get it out.